Texas Instruments TPS7201QD, TPS7201QDR, TPS7248QD, TPS7233QPWR, TPS7233QPWLE Datasheet

...
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
D
Available in 5-V, 4.85-V, 3.3-V, 3.0-V, 2.75-V§, and 2.5-V Fixed-Output and Adjustable Versions
D
Dropout Voltage <85 mV Max at I
= 100 mA (TPS7250)
O
D
Low Quiescent Current, Independent of
SENSE†/FB
RESET/PG
D, P, OR PW PACKAGE
(TOP VIEW)
GND
EN
1 2 3 4
8 7 6 5
OUT OUT IN IN
Load, 180 µA Typ
D
8-Pin SOIC and 8-Pin TSSOP Package
D
Output Regulated to ±2% Over Full Operating Range for Fixed-Output Versions
D
Extremely Low Sleep-State Current,
0.5 µA Max
D
Power-Good (PG) Status Output
description
The TPS72xx family of low-dropout (LDO) voltage regulators offers the benefits of low-dropout
SENSE – Fixed voltage options only (TPS7225, TPS7228 TPS7248, and TPS7250)
FB – Adjustable version only (TPS7201)
600
TA = 25°C
500
400
§
, TPS7230, TPS7233,
TPS7225
TPS7230
voltage, micropower operation, and miniaturized packaging. These regulators feature extremely
300
low dropout voltages and quiescent currents compared to conventional LDO regulators. Offered in small-outline integrated-circuit (SOIC) packages and 8-terminal thin shrink small-outline (TSSOP), the TPS72xx series devices are ideal for cost-sensitive designs and for designs where board space is at a premium.
A combination of new circuit design and process innovation has enabled the usual pnp pass
200
– Dropout Voltage – mV
DO
V
100
0
0 50 100 150
IO – Output Current – mA
TPS7250
TPS7248
transistor to be replaced by a PMOS device. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low
Figure 1. Typical Dropout Voltage Versus
Output Current
– maximum of 85 mV at 100 mA of load current (TPS7250) – and is directly proportional to the load current (see Figure 1). Since the PMOS pass element is a voltage-driven device, the quiescent current is very low (300 µA maximum) and is stable over the entire range of output load current (0 mA to 250 mA). Intended for use in portable systems such as laptops and cellular phones, the low-dropout voltage and micropower operation result in a significant increase in system battery operating life.
TPS7233
200 250
The TPS72xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current to 0.5 µA maximum at T
= 25°C. Other features include a power-good function that reports low output voltage
J
and may be used to implement a power-on reset or a low-battery indicator. The TPS72xx is offered in 2.5-V , 2.75-V
§
, 3-V , 3.3-V , 4.85-V, and 5-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.2 V to 9.75 V). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges (3% for adjustable version).
§
This device is in the product preview stage of development. Please contact the local TI sales office for availability.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
This document contains information on products in more than one phase of development. The status of each device is indicated on the page(s) specifying its electrical characteristics.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 1998, Texas Instruments Incorporated
1
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
T
–55 C to 150 C
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
AVAILABLE OPTIONS
OUTPUT VOLTAGE
J
°
The D package is available taped and reeled. Add R suffix to device type (e.g., TPS7250QDR). The PW package is only available left-end taped and reeled. The TPS7201Q is programmable using an external resistor divider (see application information). The chip form is tested at 25°C.
°
(V)
MIN TYP MAX
4.9 5 5.1 TPS7250QD TPS7250QP TPS7250QPWR TPS7250Y
4.75 4.85 4.95 TPS7248QD TPS7248QP TPS7248QPWR TPS7248Y
3.23 3.3 3.37 TPS7233QD TPS7233QP TPS7233QPWR TPS7233Y
2.94 3 3.06 TPS7230QD TPS7230QP TPS7230QPWR TPS7230Y
2.69 2.75 2.81 TPS7228QD
2.45 2.5 2.55 TPS7225QD TPS7225QP TPS7225QPWR TPS7225Y Adjustable
1.2 V to 9.75 V
SMALL OUTLINE
(D)
TPS7201QD TPS7201QP TPS7201QPWR TPS7201Y
PACKAGED DEVICES
TPS72xx
TPS7228QP
PDIP
(P)
TSSOP
(PW)
TPS7228QPWR
CHIP FORM
(Y)
TPS7228Y
V
I
0.1 µF
TPS7225Q, TPS7228Q (fixed-voltage options)
NOTE A: Capacitor selection is nontrivial. See application information section
for details.
5
IN
6
IN
SENSE
4
EN
GND
3
, TPS7230Q, TPS7233Q, TPS7248Q, TPS7250Q
PG
OUT OUT
2 1 7 8
PG
250 k
V
O
C
O
(see Note A)
+
10 µF
CSR = 1
Figure 2. Typical Application Configuration
This device is in the product preview stage of development. Please contact the local TI sales office for availability.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS72xx chip information
These chips, when properly assembled, display characteristics similar to the TPS72xxQ. Thermal compression or ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with conductive epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
7
(7)
57
1
(1)
(2)
(6)
6
2
functional block diagram
(5) 5
69
(4)
4
(5)
(3)
IN
(2)
EN
CHIP THICKNESS: 15 MILS TYPICAL BONDING PADS: 4 × 4 MILS MINIMUM TJmax = 150°C TOLERANCES ARE ±10%. ALL DIMENSIONS ARE IN MILS.
Fixed-voltage options only (TPS7225, TPS7228#,
3
(3)
TPS7230, TPS7233, TPS7248, and TPS7250)
Adjustable version only (TPS7201)
NOTE A. For most applications, OUT and SENSE should
be tied together as close as possible to the device; for other implementations, refer to the SENSE-pin connection discussion in the application information section of this data sheet.
TPS72xx
(1)
GND
(6) (4) (7)
SENSE
ĕ
FB OUT PG
Ĕ
IN
_ +
§
1.12 V
GND
low (active).
+ _
EN
V
= 1.188 V
ref
§
Switch positions are shown with EN
For most applications, SENSE should be externally connected to OUT as close as possible to the device. For other implementations, refer to the SENSE-pin connection discussion in application information section.
#
This device is in the product preview stage of development. Please contact the local TI sales office for availability.
§§
PG
OUT
SENSE¶/FB
R1
R2
RESISTOR DIVIDER OPTIONS
DEVICE
TPS7201 TPS7225
TPS7228
TPS7230 TPS7233 TPS7248 TPS7250
NOTE A: Resistors are nominal values only.
#
0 257 306 357 420 726 756
COMPONENT COUNT
MOS transistors Bilpolar transistors Diodes Capacitors Resistors
233 233 233 233 233 233
UNITR1 R2
k k k k k k
108
41
4 15 75
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
3
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PACKAGE
A
PPW1175 mW
8.74 mW/°C
782 mW
650 mW
301 mW
PACKAGE
C
PPW2738 mW
20.49 mW/°C
1816 mW
1508 mW
689 mW
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
ĕ
Input voltage range Output current, I
Continuous total power dissipation See Dissipation Rating Tables 1 and 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual junction temperature range, T Storage temperature range, T
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltage values are with respect to network ground terminal.
D
D
NOTE 1: Dissipation rating tables and figures are provided for maintenance of junction temperature at or below absolute
maximum of 150°C. For guidelines on maintaining junction temperature within the recommended operating range, see application information section.
, VI, PG, SENSE, EN –0.3 V to 11 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
–55°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERA TURE (see Note 1 and Figure 3)
T
25°C DERATING FACTOR T
POWER RATING ABOVE TA = 25°CAPOWER RATINGAPOWER RATINGAPOWER RATING
725 mW
525 mW
DISSIPATION RATING TABLE 2 – CASE TEMPERA TURE (see Note 1 and Figure 4)
T
25°C DERATING FACTOR T
POWER RATING ABOVE TC = 25°CCPOWER RATINGCPOWER RATINGCPOWER RATING
2063 mW
2900 mW
5.8 mW/°C
4.2 mW/°C
16.5 mW/°C
23.2 mW/°C
J
= 70°C T
464 mW
°
336 mW
= 70°C T
1320 mW
°
1856 mW
= 85°C T
377 mW
273 mW
= 85°C T
1073 mW
1508 mW
= 125°C
145 mW
105 mW
= 125°C
413 mW
580 mW
Ĕ
MAXIMUM CONTINUOUS DISSIPATION
vs
FREE-AIR TEMPERATURE
1200
1100
1000
900 800 700 600 500 400 300 200
– Maximum Continuous Dissipation – mW
D
100
P
0
25 50 75 100
P Package R
= 114.4°C/W
θJA
D Package R
PW Package
R
= 238°C/W
θJA
TA – Free-Air Temperature – ° C
θJA
Figure 3
= 172°C/W
125 150
MAXIMUM CONTINUOUS DISSIPATION
vs
CASE TEMPERATURE
3000
2500
2000
1500
1000
500
– Maximum Continuous Dissipation – mW
D
P
0
25 50 75 100
P Package R
= 48.8°C/W
θJC
PW Package R
= 43.1°C/W
θJC
D Package
R
= 60.6°C/W
θJC
TC – Case Temperature – °C
Figure 4
125 150
4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
recommended operating conditions
MIN MAX UNIT
TPS7201Q 3 10 TPS7225Q 3.65 10 TPS7228Q
Input voltage, V
High-level input voltage at EN, V Low-level input voltage at EN, V Output current, I Operating virtual junction temperature, T
Minimum input voltage defined in the recommended operating conditions is the maximum specified output voltage plus dropout voltage at the maximum specified load range. Since dropout voltage is a function of output current, the usable range can be extended for lighter loads. To calculate the minimum input voltage for the maximum load current used in a given application, use the following equation:
V
Because the TPS7201 is programmable, r calculating VDO from r lower limit for the recommended input-voltage range for the TPS7201.
This device is in the product preview stage of development. Please contact the local TI sales office for availability.
I(min)
+
I
O
V
O(max)
DS(on)
IH
IL
J
)
V
DO(max load)
is given in Note 3 under the TPS7201 electrical characteristics table. The minimum value of 3 V is the absolute
DS(on)
TPS7230Q 3.96 10 TPS7233Q 3.98 10 TPS7248Q 5.24 10 TPS7250Q 5.41 10
should be used to calculate VDO before applying the above equation. The equation for
TBD 10
V
2 V
0.5 V
0 250 mA
–40 125 °C
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
5
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
T
UNIT
,
,
Ground current (active mode)
EN 0.5 V,
V
I
V
O
V,
A
Input current (standby mode)
EN
V
3 V ≤ V
V
A
Output current limit threshold
V
V
V
V
A
g
EN
V
3 V ≤ V
V
A
PG leak
t
V
Normal operation
A
EN logic high (standb
)
40°C to 125°C
V
EN logic l
)
3 V ≤ V
V
V
EN i
t
0 V ≤ V
V
A
Minimum V
for active pass element
V
Minimum V
for valid PG
I
300 µA
V
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
electrical characteristics, IO = 10 mA, EN = 0 V , CO = 4.7 µF (CSR† = 1 ), SENSE/FB shorted to OUT (unless otherwise noted)
J
EN 0.5 V 0 mA IO 250 mA
p
p
Pass-element leakage current in standby mode
age curren
Output voltage temperature coefficient –40°C to 125°C 31 75 ppm/°C Thermal shutdown junction temperature 165 °C
y mode
ow (active mode
EN hysteresis voltage 25°C 50 mV
nput curren
I
I
CSR(compensation series resistance) refers to the total series resistance, including the equivalent series resistance (ESR) of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
p
=
,
I
= 0
O
=
,
I
= 10 V,
PG
3 V VI 6 V 6 V VI 10 V
≤ 10
I
≤ 10
I
=
PG
V
= V
= 10
I
+ 1 V
+ 1
≤ 10
I
≤ 10
I
p
25°C 180 225
–40°C to 125°C 325
25°C 0.5
–40°C to 125°C 1
25°C 0.6 1
–40°C to 125°C 1.5
25°C 0.5
–40°C to 125°C 1
25°C 0.5
–40°C to 125°C 0.5
°
–40°C to 125°C 0.5
–40°C to 125°C –0.5 0.5
–40°C to 125°C 2.5
–40°C to 125°C 1.9
°
25°C 0.5
25°C –0.5 0.5
25°C 1.9 2.5
25°C 1.1 1.5
TPS72xxQ
MIN TYP MAX
µ
µ
µ
µ
2
2.7
µ
6
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
T
UNIT
g(
V
50 µA ≤ I
250 mA
Input regulation
I
,
µ
O
,
mV
O
,
I
,
Output regulation
mV
O
µ ,
I
,
I
A
Ripple rejection
f
120 H
dB
O
,
CSR
PG
I
400 µA
V
2.13 V
V
FB input current
nA
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7201Q electrical characteristics, IO = 10 mA, V
= 3.5 V, EN = 0 V, CO = 4.7 µF (CSR† = 1 ), FB
I
shorted to OUT at device leads (unless otherwise noted)
J
Reference voltage (measured at FB with OUT connected to FB)
Reference voltage temperature coefficient
Pass-element series resistance (see Note 3)
p
p
pp
Output noise spectral density f = 120 Hz 25°C 2
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
output low voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
§
This voltage is not recommended.
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).
NOTES: 2. When VI < 2.9 V and IO > 100 mA simultaneously, pass element r
dropout voltage prevents the regulator from maintaining the specified tolerance range.
3. To calculate dropout voltage, use equation:
r
DS(on)
5.9 V , which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V , 4 V, and 6 V , respectively. For other programmed values, refer to Figures 10 and 11.
VDO = IO
is a function of both output current and input voltage. The parametric table lists r
VI = 3.5 V, IO = 10 mA 25°C 1.188 V 3 V VI 10 V,
See Note 2
VI = 2.4 V, VI = 2.4 V,
I
VI = 3.9 V, 50 µA IO 250 mA 25°C 1 VI = 5.9 V, 50 µA IO 250 mA 25°C 0.8
V See Note 2
I See Note 2
I See Note 2
=
10 Hz f 100 kHz,
VFB voltage decreasing from above V Measured at V
PG
r
DS(on)
§
§
= 2.9 V,
= 3 V to 10 V, 50 µA I
= 5 mA to 250 mA, 3 V V
= 50 µA to 250 mA, 3 V V
z
= 1
FB
=
,
5 mA IO 250 mA,
50 µA IO 100 mA 25°C 2.1 100 mA IO 200 mA 25°C 2.9
O
250 mA,
10 V,
10 V,
= 50 µ
O
I
= 250 mA,
See Note 2
CO = 4.7 µF 25°C 235 CO = 10 µF 25°C 190 CO = 100 µF 25°C 125
PG
=
I
–40°C to 125°C 1.152 1.224 V
–40°C to 125°C 31 75 ppm/°C
25°C 1.6 2.7
–40°C to 125°C 4.5
25°C 23
–40°C to 125°C 36
25°C 15 25
–40°C to 125°C 36
25°C 17 27
–40°C to 125°C 43
25°C 49 60
–40°C to 125°C 32
25°C 45 50
–40°C to 125°C 30
–40°C to 125°C
25°C 12 mV 25°C 0.1 0.4
–40°C to 125°C 0.4
25°C –10 0.1 10
–40°C to 125°C –20 20
increases (see Figure 10) to a point such that the resulting
DS(on)
TPS7201Q
MIN TYP MAX
0.95 ×
V
FB(nom)
for VI = 2.4 V, 2.9 V, 3.9 V, and
DS(on)
µV/Hz
µVrms
V
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
7
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
T
UNIT
Output voltage
V
D
I
250 mA
V
V
Pass-element series resistance
(
O)O
,
I
,
Input regulation
V
50 µA ≤ I
250 mA
mV
I
250 mA
V
V
Output regulation
mV
I
250 mA
V
V
I
A
Ripple rejection
f
120 H
dB
I
250 mA
CSR
PG output low voltage
I
1.2 mA
V
2.13 V
V
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7225Q electrical characteristics, IO = 10 mA, V
= 3.5 V , EN = 0 V , CO = 4.7 µF (CSR† = 1 ), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral density f = 120 Hz 25°C 2
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 3.5 V, IO = 10 mA 25°C 2.5
3.5 V VI 10 V, 5 mA IO 250 mA –40°C to 125°C 2.45 2.55
=
O
(2.97 V – V IO = 250 mA
= 3.5 V to 10 V,
I
= 5 mA to
O
= 50 µA to
O
=
10 Hz f 100 kHz,
VO voltage decreasing from above V
=
PG
= 1
=
,
)/I
, V
z
,
= 2.97
I
= 2.97 V,
,3.5 V ≤
,3.5 V ≤
= 50 µ
O
=
O
CO = 4.7 µF CO = 10 µF CO = 100 µF
=
I
O
I
I
≤ 10
≤ 10
PG
25°C 560 850 mV
–40°C to 125°C 1.1 V
25°C 2.24 3.4
–40°C to 125°C 3.84
25°C 9 27
–40°C to 125°C 33
25°C 28 36
–40°C to 125°C 60
25°C 24 41
–40°C to 125°C 73
25°C 47 58
–40°C to 125°C 45
25°C 40 46
–40°C to 125°C 38
25°C 248 25°C 200 25°C 130
–40°C to 125°C
25°C 50 mV 25°C 0.3 0.44
–40°C to 125°C 0.5
TPS7225Q
MIN TYP MAX
0.95 ×
V
O(nom)
µV/Hz
µVrms
V
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
T
UNIT
Output voltage
V
I
V
V
D
I
100 mA
V
V
mV
I
250 mA
V
V
Pass-element series resistance
(
O)O
,
I
,
Input regulation
V
50 µA ≤ I
250 mA
mV
I
250 mA
V
V
Output regulation
mV
I
250 mA
V
V
I
50 µA
Ripple rejection
f
120 H
dB
I
250 mA
CSR
PG output low voltage
I
V
V
V
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7228Q electrical characteristics, IO = 10 mA, V
= 3.75 V, EN = 0 V, CO = 4.7 µF (CSR† = 1 ),
I
SENSE shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral density f = 120 Hz 25°C TBD µV/Hz
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 3.75 V, IO = 10 mA 25°C 2.75
3.75 V VI 10 V, 5 mA IO 250 mA –40°C to 125° C 2.69 2.81
= 10 mA,
O
=
O
=
O
(2.69 V – V IO = 250 mA
= 3.75 V to 10 V,
I
= 5 mA to
O
= 50 µA to
O
=
10 Hz f 100 kHz,
VO voltage decreasing from above V
= 1.2 mA,
PG
= 1
=
z
,
,
)/I
, V
= 2.69
I
= 2.69
I
= 2.69
I
= 2.69 V,
,3.75 V ≤
,3.75 V ≤
=
O
=
O
CO = 4.7 µF CO = 10 µF CO = 100 µF
= 2.34
I
O
≤ 10
I
≤ 10
I
PG
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD
–40°C to 125°C TBD
25°C TBD 25°C TBD 25°C TBD
–40°C to 125°C TBD V
25°C TBD mV 25°C TBD
–40°C to 125°C TBD
TPS7228Q
MIN TYP MAX
µVrms
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
9
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
T
UNIT
Output voltage
V
I
100 mA
V
V
D
mV
I
250 mA
V
V
Pass-element series resistance
(
O)O
,
I
,
Input regulation
V
50 µA ≤ I
250 mA
mV
I
250 mA
V
V
Output regulation
mV
I
250 mA
V
V
I
A
Ripple rejection
f
120 H
dB
I
250 mA
CSR
PG output low voltage
I
V
V
V
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7230Q electrical characteristics, IO = 10 mA, V
= 4 V , EN = 0 V , CO = 4.7 µF (CSR† = 1 ), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral density f = 120 Hz 25°C 2 µV/Hz
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 4 V, IO = 10 mA 25°C 3 4 V VI 10 V, 5 mA IO 250 mA –40°C to 125° C 2.94 3.06
=
O
=
O
(2.97 V – V IO = 250 mA
= 4 V to 10 V,
I
= 5 mA to
O
= 50 µA to
O
=
10 Hz f 100 kHz,
VO voltage decreasing from above V
= 1.2 mA,
PG
= 1
=
z
,
,
)/I
, V
,4 V ≤
,4 V ≤
= 2.97
I
= 2.97
I
= 2.97 V,
O
≤ 10
I
≤ 10
I
= 50 µ
O
=
O
CO = 4.7 µF CO = 10 µF CO = 100 µF
= 2.55
I
PG
25°C 145 185
–40°C to 125°C 270
25°C 390 502
–40°C to 125°C 900
25°C 1.56 2.01
–40°C to 125°C 3.6
25°C 9 27
–40°C to 125°C 33
25°C 34 45
–40°C to 125°C 74
25°C 42 60
–40°C to 125°C 98
25°C 45 56
–40°C to 125°C 44
25°C 40 45
–40°C to 125°C 38
25°C 256 25°C 206 25°C 132
–40°C to 125°C
25°C 50 mV 25°C 0.25 0.44
–40°C to 125°C 0.44
TPS7230Q
MIN TYP MAX
0.95 ×
V
O(nom)
µVrms
V
10
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
T
UNIT
Output voltage
V
I
V
V
D
I
100 mA
V
V
mV
I
250 mA
V
V
Pass-element series resistance
(
O)O
,
I
,
Input regulation
V
50 µA ≤ I
250 mA
mV
I
250 mA
V
V
Output regulation
mV
I
250 mA
V
V
I
50 µA
Ripple rejection
f
120 H
dB
I
250 mA
CSR
PG output low voltage
I
V
V
V
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7233Q electrical characteristics, IO = 10 mA, V
= 4.3 V , EN = 0 V , CO = 4.7 µF (CSR† = 1 ), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral density f = 120 Hz 25°C 2
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 4.3 V, IO = 10 mA 25°C 3.3
4.3 V VI 10 V, 5 mA IO 250 mA –40°C to 125° C 3.23 3.37
= 10 mA,
O
=
O
=
O
(3.23 V – V IO = 250 mA
= 4.3 V to 10 V,
I
= 5 mA to
O
= 50 µA to
O
=
10 Hz f 100 kHz,
VO voltage decreasing from above V
= 1.2 mA,
PG
= 1
,
,
)/I
, V
z
=
= 3.23
I
= 3.23
I
= 3.23
I
= 3.23 V,
,4.3 V ≤
,4.3 V ≤
=
O
=
O
CO = 4.7 µF CO = 10 µF CO = 100 µF
= 2.8
I
O
I
I
≤ 10
≤ 10
PG
25°C 14 20
–40°C to 125°C 30
25°C 140 180
–40°C to 125°C 232
25°C 360 460
–40°C to 125°C 610
25°C 1.5 1.84
–40°C to 125°C 2.5
25°C 8 25
–40°C to 125°C 33
25°C 32 42
–40°C to 125°C 71
25°C 41 55
–40°C to 125°C 98
25°C 40 52
–40°C to 125°C 38
25°C 35 44
–40°C to 125°C 33
25°C 265 25°C 212 25°C 135
–40°C to 125°C
25°C 32 mV 25°C 0.22 0.4
–40°C to 125°C 0.4
TPS7233Q
MIN TYP MAX
0.95 ×
V
O(nom)
µV/Hz
µVrms
V
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
11
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
T
UNIT
Output voltage
V
I
V
V
D
I
100 mA
V
V
mV
I
250 mA
V
V
Pass-element series resistance
(
O)O
,
I
,
Input regulation
V
50 µA ≤ I
250 mA
mV
I
250 mA
V
V
Output regulation
mV
I
250 mA
V
V
I
50 µA
Ripple rejection
f
120 H
dB
I
250 mA
CSR
PG output low voltage
I
V
V
V
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7248Q electrical characteristics, IO = 10 mA, V
= 5.85 V, EN = 0 V, CO = 4.7 µF (CSR† = 1 ),
I
SENSE shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral density f = 120 Hz 25°C 2 µV/Hz
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 5.85 V, IO = 10 mA 25°C 4.85
5.85 V VI 10 V, 5 mA IO 250 mA –40°C to 125° C 4.75 4.95
= 10 mA,
O
=
O
=
O
(4.75 V – V IO = 250 mA
= 5.85 V to 10 V,
I
= 5 mA to
O
= 50 µA to
O
=
10 Hz f 100 kHz,
VO voltage decreasing from above V
= 1.2 mA,
PG
= 1
=
z
,
,
)/I
, V
= 4.75
I
= 4.75
I
= 4.75
I
= 4.75 V,
,5.85 V ≤
,5.85 V ≤
=
O
=
O
CO = 4.7 µF CO = 10 µF CO = 100 µF
= 4.12
I
O
≤ 10
I
≤ 10
I
PG
25°C 10 19
–40°C to 125°C 30
25°C 90 100
–40°C to 125°C 150
25°C 216 250
–40°C to 125°C 285
25°C 0.8 1
–40°C to 125°C 1.4
25°C 34
–40°C to 125°C 50
25°C 43 55
–40°C to 125°C 95
25°C 55 75
–40°C to 125°C 135
25°C 42 53
–40°C to 125°C 36
25°C 36 46
–40°C to 125°C 34
25°C 370 25°C 290 25°C 168
–40°C to 125°C
25°C 50 mV 25°C 0.2 0.4
–40°C to 125°C 0.4
TPS7248Q
MIN TYP MAX
0.95 ×
V
O(nom)
µVrms
V
12
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
T
UNIT
Output voltage
V
I
V
V
D
I
100 mA
V
V
mV
I
250 mA
V
V
Pass-element series resistance
(
O)O
,
I
,
Input regulation
V
50 µA ≤ I
250 mA
mV
I
250 mA
V
V
Output regulation
mV
I
250 mA
V
V
I
50 µA
Ripple rejection
f
120 H
dB
I
250 mA
CSR
PG output low voltage
I
V
V
V
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TPS7250Q electrical characteristics, IO = 10 mA, V
= 6 V , EN = 0 V , CO = 4.7 µF (CSR† = 1 ), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral density f = 120 Hz 25°C 2
Output noise voltage
PG trip-threshold voltage PG hysteresis voltage
p
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally , and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 6 V, IO = 10 mA 25°C 5 6 V VI 10 V, 5 mA IO 250 mA –40°C to 125° C 4.9 5.1
= 10 mA,
O
=
O
=
O
(4.88 V – V IO = 250 mA
= 6 V to 10 V,
I
= 5 mA to
O
= 50 µA to
O
=
10 Hz f 100 kHz,
VO voltage decreasing from above V
= 1.2 mA,
PG
=
= 1
,
,
)/I
, V
z
= 4.88
I
= 4.88
I
= 4.88
I
= 4.88 V,
,6 V ≤
,6 V ≤
=
O
=
O
CO = 4.7 µF CO = 10 µF CO = 100 µF
= 4.25
I
O
≤ 10
I
≤ 10
I
PG
25°C 8 12
–40°C to 125°C 30
25°C 76 85
–40°C to 125°C 136
25°C 190 206
–40°C to 125°C 312
25°C 0.76 0.825
–40°C to 125°C 1.25
25°C 28
–40°C to 125°C 35
25°C 46 61
–40°C to 125°C 100
25°C 59 79
–40°C to 125°C 150
25°C 41 52
–40°C to 125°C 37
25°C 36 46
–40°C to 125°C 32
25°C 390 25°C 300 25°C 175
–40°C to 125°C
25°C 50 mV 25°C 0.19 0.4
–40°C to 125°C 0.4
TPS7250Q
MIN TYP MAX
0.95 ×
V
O(nom)
µV/Hz
µVrms
V
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
13
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
UNIT
PARAMETER
TEST CONDITIONS
UNIT
Output regulation
mV
V V
I
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
electrical characteristics, IO = 10 mA, EN = 0 V, CO = 4.7 µF (CSR† = 1 ), TJ = 25°C, SENSE/FB shorted to OUT (unless otherwise noted)
TPS72xxY
MIN TYP MAX
Ground current (active mode) Output current limit threshold VO = 0 V, VI = 10 V 0.6 A
Thermal shutdown junction temperature 165 °C EN hysteresis voltage 50 mV Minimum VI for active pass element 1.9 V Minimum VI for valid PG IPG = 300 µA 1.1 V
EN 0.5 V, 0 mA IO 250 mA
electrical characteristics, IO = 10 mA, EN = 0 V, CO = 4.7 µF (CSR† = 1 ), TJ = 25°C, FB shorted to OUT at device leads (unless otherwise noted)
Reference voltage (measured at FB with OUT connected to FB)
Pass-element series resistance (see Note 3)
p
Ripple rejection
Output noise spectral density VI = 3.5 V, f = 120 Hz 2
Output noise voltage
PG hysteresis voltage PG output low voltage FB input current
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
§
This voltage is not recommended.
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).
NOTES: 2 When VI < 2.9 V and IO > 100 mA simultaneously, pass element r
dropout voltage prevents the regulator from maintaining the specified tolerance range.
3 To calculate dropout voltage, use equation:
r
5.9 V , which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V , 4 V, and 6 V , respectively. For other programmed values, refer to Figures 10 and 11.
VDO = IO
DS(on)
r
is a function of both output current and input voltage. The parametric table lists r
DS(on)
VI = 3.5 V, IO = 10 mA 1.188 V
= 3.5 V,
=
= 3.5 V,
§
§
DS(on)
VI = 2.4 V, VI = 2.4 V, VI = 2.9 V, 50 µA IO 250 mA 1.6 VI = 3.9 V, 50 µA IO 250 mA 1 VI = 5.9 V, 50 µA IO 250 mA 0.8 3 V VI 10 V,
See Note 2 3 V VI 10 V,
See Note 2
I
f = 120 Hz
10 Hz f 100 kHz, CSR† = 1
VI = 3.5 V, Measured at V VI = 2.13 V, IPG = 400 µA 0.1 V VI = 3.5 V
VI = VO + 1 V,
MIN TYP MAX
50 µA IO 100 mA 2.1 100 mA IO 200 mA 2.9
IO = 5 mA to 250 mA,
IO = 50 µA to 250 mA,
IO = 50 µA 60 IO = 250 mA,
See Note 2
CO = 4.7 µF 235 CO = 10 µF 190 CO = 100 µF 125
FB
increases (see Figure 10) to a point such that the resulting
DS(on)
180 µA
TPS7201Y
15
17
50
µV/Hz
12 mV
0.1 nA
for VI = 2.4 V, 2.9 V, 3.9 V, and
dB
µVrms
14
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
UNIT
Output regulation
mV
Ripple rejection
I
,
dB
V
I
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
electrical characteristics, IO = 10 mA, EN = 0 V, CO = 4.7 µF (CSR† = 1 ), TJ = 25°C, FB shorted to OUT at device leads (unless otherwise noted)
TPS7225Y
MIN TYP MAX
Output voltage VI = 3.5 V, IO = 10 mA 2.5 V Dropout voltage
Pass-element series resistance Input regulation VI = 3.5 V to 10 V, 50 µA IO 250 mA 9 mV
p
pp
Output noise spectral density VI = 3.5 V, f = 120 Hz 2 µV/Hz
Output noise voltage
PG hysteresis voltage VI = 3.5 V PG output low voltage
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 2.97 V, IO = 250 mA 560 mV (2.97 V – VO)/IO,
IO = 250 mA
3.5 V VI 10 V IO = 5 mA to 250 mA 28
3.5 V VI 10 V IO = 50 µA to 250 mA 24 V
= 3.5 V,
f = 120 Hz
=
= 3.5 V, 10 Hz f 100 kHz, CSR† = 1
VI = 2.13 V IPG = 1.2 mA 0.3 V
VI = 2.97 V,
IO = 50 µA 58 IO = 250 mA 46
CO = 4.7 µF CO = 10 µF CO = 100 µF
2.24
248 200 130
50 mV
µVrms
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
15
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
UNIT
Output regulation
mV
Ripple rejection
I
,
dB
V
I
PARAMETER
TEST CONDITIONS
UNIT
D
mV
Output regulation
mV
Ripple rejection
I
,
dB
V
I
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
electrical characteristics, IO = 10 mA, EN = 0 V , CO = 4.7 µF (CSR† = 1 ), TJ = 25°C, SENSE shorted to OUT (unless otherwise noted) (continued)
TPS7228Y
MIN TYP MAX
Output voltage VI = 3.75 V, IO = 10 mA 2.75 V
VI = 2.97 V, IO = 10 mA TBD
Dropout voltage
Pass-element series resistance Input regulation VI = 3.75 V to 10 V, 50 µA IO 250 mA TBD mV
p
pp
Output noise spectral density VI = 3.75 V, f = 120 Hz TBD
Output noise voltage
PG hysteresis voltage VI = 3.75 V PG output low voltage
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 2.97 V, IO = 100 mA TBD VI = 2.97 V, IO = 250 mA TBD (2.97 V – VO)/IO,
IO = 250 mA
3.75 V VI 10 V, IO = 5 mA to 250 mA TBD
3.75 V VI 10 V, IO = 50 µA to 250 mA TBD V
= 3.75 V,
f = 120 Hz
=
= 3.75 V, 10 Hz f 100 kHz, CSR† = 1
VI = 2.34 V, IPG = 1.2 mA TBD V
VI = 2.97 V,
IO = 50 µA TBD IO = 250 mA TBD
CO = 4.7 µF CO = 10 µF CO = 100 µF
TBD
TBD TBD TBD TBD mV
mV
µV/Hz
µVrms
TPS7230Y
MIN TYP MAX
Output voltage VI = 4 V, IO = 10 mA 3 V
ropout voltage
Pass-element series resistance Input regulation VI = 4 V to 10 V, 50 µA IO 250 mA 9 mV
p
pp
Output noise spectral density VI = 4 V, f = 120 Hz 2 µV/Hz
Output noise voltage
PG hysteresis voltage VI = 4 V PG output low voltage
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 2.97 V, IO = 100 mA 145 VI = 2.97 V, IO = 250 mA 390 (2.97 V – VO)/IO,
IO = 250 mA
4 V VI 10 V IO = 5 mA to 250 mA 34 4 V VI 10 V IO = 50 µA to 250 mA 41
V
= 4 V,
f = 120 Hz
=
= 4 V, 10 Hz f 100 kHz, CSR† = 1
VI = 2.55 V IPG = 1.2 mA 0.25 V
VI = 2.97 V,
IO = 50 µA 56 IO = 250 mA 45
CO = 4.7 µF CO = 10 µF CO = 100 µF
1.56
256 206 132
50 mV
µVrms
16
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
UNIT
Output regulation
mV
Ripple rejection
I
,
dB
V
I
PARAMETER
TEST CONDITIONS
UNIT
Output regulation
mV
Ripple rejection
I
,
dB
V
I
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
electrical characteristics, IO = 10 mA, EN = 0 V , CO = 4.7 µF (CSR† = 1 ), TJ = 25°C, SENSE shorted to OUT (unless otherwise noted) (continued)
TPS7233Y
MIN TYP MAX
Output voltage VI = 4.3 V, IO = 10 mA 3.3 V
VI = 3.23 V, IO = 10 mA 14
Dropout voltage
Pass-element series resistance Input regulation VI = 4.3 V to 10 V, 50 µA IO 250 mA 8 mV
p
pp
Output noise spectral density VI = 4.3 V, f = 120 Hz 2
Output noise voltage
PG hysteresis voltage VI = 4.3 V PG output low voltage
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 3.23 V, IO = 100 mA 140 VI = 3.23 V, IO = 250 mA 360 (3.23 V – VO)/IO,
IO = 250 mA
4.3 V VI 10 V, IO = 5 mA to 250 mA 32
4.3 V VI 10 V, IO = 50 µA to 250 mA 41 V
= 4.3 V,
f = 120 Hz
=
= 4.3 V, 10 Hz f 100 kHz, CSR† = 1
VI = 2.8 V, IPG = 1.2 mA 0.22 V
VI = 3.23 V,
IO = 50 µA 52 IO = 250 mA 44
CO = 4.7 µF CO = 10 µF CO = 100 µF
1.5
265 212 135
32 mV
mV
µV/Hz
µVrms
TPS7248Y
MIN TYP MAX
Output voltage VI = 5.85 V, IO = 10 mA 4.85 V
VI = 4.75 V, IO = 10 mA 10
Dropout voltage
Pass-element series resistance
p
pp
Output noise spectral density VI = 5.85 V, f = 120 Hz 2 µV/Hz
Output noise voltage
PG hysteresis voltage VI = 5.85 V PG output low voltage
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 4.75 V, IO = 100 mA 90 VI = 4.75 V, IO = 250 mA 216 (4.75 V – VO)/IO,
IO = 250 mA
5.85 V VI 10 V IO = 5 mA to 250 mA 43
5.85 V VI 10 V IO = 50 µA to 250 mA 55 V
= 5.85 V,
f = 120 Hz
=
= 5.85 V, 10 Hz f 100 kHz, CSR† = 1
VI = 4.12 V IPG = 1.2 mA 0.2 V
VI = 4.75 V,
IO = 50 µA 53 IO = 250 mA 46
CO = 4.7 µF CO = 10 µF CO = 100 µF
0.8
370 290 168
50 mV
mV
µVrms
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
17
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
UNIT
Output regulation
mV
Ripple rejection
I
,
dB
V
I
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
electrical characteristics, IO = 10 mA, EN = 0 V , CO = 4.7 µF (CSR† = 1 ), TJ = 25°C, SENSE shorted to OUT (unless otherwise noted) (continued)
TPS7250Y
MIN TYP MAX
Output voltage VI = 6 V, IO = 10 mA 5 V
VI = 4.88 V IO = 10 mA 8
Dropout voltage
Pass-element series resistance Input regulation VI = 6 V to 10 V, 50 µA IO 250 mA mV
p
pp
Output noise spectral density VI = 6 V, f = 120 Hz 2
Output noise voltage
PG hysteresis voltage VI = 6 V PG output low voltage
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally , and PWB trace resistance to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately.
VI = 4.88 V IO = 100 mA 76 VI = 4.88 V, IO = 250 mA 190 (4.88 V – VO)/IO,
IO = 250 mA
6 V VI 10 V, IO = 5 mA to 250 mA 46 6 V VI 10 V, IO = 50 µA to 250 mA 59
V
= 6 V,
f = 120 Hz
=
= 6 V, 10 Hz f 100 kHz, CSR† = 1
VI = 4.25 V, IPG = 1.2 mA 0.19 V
VI = 4.88 V,
IO = 50 µA 52 IO = 250 mA 46
CO = 4.7 µF CO = 10 µF CO = 100 µF
0.76
390 300 175
50 mV
mV
µV/Hz
µVrms
18
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
IQQuiescent current
Compensation series resistance (CSR)
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
vs Output current 5 vs Input voltage 6
I
Q
V
DO
V
DO
V
DO
r
DS(on)
V
O
V
O
V
O(PG)
r
DS(on)PG
V
I
This symbol is not currently listed within EIA or JEDEC standards for semiconductor symbology.
Change in quiescent current vs Free-air temperature 7 Dropout voltage vs Output current 8 Change in dropout voltage vs Free-air temperature 9 Dropout voltage (TPS7201 only) vs Output current 10 Pass-element series resistance vs Input voltage 11 Change in output voltage vs Free-air temperature 12 Output voltage vs Input voltage 13 Line regulation vs Input voltage 14 Load regulation
(TPS7225, TPS7233, TPS7248, TPS7250) Power-good (PG) voltage vs Output voltage 16 Power-good (PG) on-resistance vs Input voltage 17 Minimum input voltage for valid PG vs Free-air temperature 18 Output voltage response from enable (EN) vs Time 19 Load transient response (TPS7201/TPS7233) vs Time 20 Load transient response (TPS7248/TPS7250) vs Time 21 Line transient response (TPS7201) vs Time 22 Line transient response (TPS7233) vs Time 23 Line transient response (TPS7248/TPS7250) vs Time 24 Ripple rejection vs Frequency 25 Output Spectral Noise Density vs Frequency 26
p
vs Input voltage 15
vs Output current (CO = 4.7 µF) 27 vs Added ceramic capacitance (CO = 4.7 µF) 28 vs Output current (CO = 10 µF) 29 vs Added ceramic capacitance (CO = 10 µF) 30
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
19
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
QUIESCENT CURRENT
OUTPUT CURRENT
230
TA = 25°C
220
Aµ
210
200
190
180
– Quiescent Current –
170
Q
I
160
150
0 50 100 150
IO – Output Current – mA
vs
Figure 5
TPS7248 VI = 10 V
TPS7233 VI = 10 V
TPS7250 VI = 10 V
TPS7248 VI = 5.85 V
TPS7250 VI = 6.0 V
TPS7233 VI = 4.3 V
200 250
QUIESCENT CURRENT
INPUT VOLTAGE
250
TA 25°C IO = 250 mA
200
Aµ
150
100
– Quiescent Current –
Q
I
50
0
0123456
TPS7250
VI – Input Voltage – V
Figure 6
vs
TPS7248
TPS7233
TPS7201 With VO Programmed to 2.5 V
78910
CHANGE IN QUIESCENT CURRENT
vs
FREE-AIR TEMPERATURE
50
IO = 10 mA VI = VO + 1 V
40
Aµ
30
20
10
0
–10
–20
– Change in Quiescent Current –
Q
–30
I
– 40
– 40 – 20 0 20 40 60 80 100 120 140
TA – Free-Air Temperature – ° C
Figure 7
DROPOUT VOLTAGE
OUTPUT CURRENT
600
TA = 25°C
500
400
300
200
– Dropout Voltage – mV
DO
V
100
0
0 50 100 150
IO – Output Current – mA
vs
TPS7225
TPS7230
TPS7233
TPS7248
TPS7250
200 250
Figure 8
20
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
TPS7201
DROPOUT VOLTAGE
vs
OUTPUT CURRENT
VI = 2.4 V
0.05
0.04
CHANGE IN DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
TPS7230
1.6
1.4
0.03
0.02
0.01
0
–0.01
– Change in Dropout Voltage – V∆V
–0.02
DO
–0.03
–0.04
–40 –20 0 20 40 60 80 100 120
TA – Free-Air Temperature – ° C
TPS7233
TPS7248/TPS7250
Figure 9
PASS ELEMENT SERIES RESISTANCE
vs
INPUT VOLTAGE
6
5
4
3
IO = 250 mA
TA = 25°C VFB = 1.12 V
140
1.2 VI = 2.9 V
1
0.8
0.6
– Dropout Voltage – VV
0.4
DO
0.2
0
0 50 100 150 200 250
This voltage is not recommended.
VI = 3.2 V VI = 3.9 V
VI = 5.9 V
VI = 9.65 V
IO – Output Current – mA
Figure 10
CHANGE IN OUTPUT VOLTAGE
FREE-AIR TEMPERATURE
15
10
5
0
–5
vs
VI = 2.6 V
IO = 10 mA VI = VO + 1 V
2
– Pass Element Series Resistance –
1
IO = 100 mA
DS(on)
r
0
234567
VI – Input Voltage – V
Figure 11
–10
–15
– Change in Output Voltage – mV∆V
O
–20
8910
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
–25
–40 –20 0 20 40 60 80 100 120 140
TA – Free-Air Temperature – ° C
Figure 12
21
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
5.5 TA = 25°C
5
IO = 250 mA
4.5
4
3.5
3
2.5
2
– Output Voltage – V
O
1.5
V
1
0.5
0
0123456
VI – Input Voltage – V
TPS7250
TPS7248
TPS7233
TPS7201 With VO Programmed to 2.5 V
78910
25
TA = 25°C
20
IO = 250 mA 15 10
5
TPS7233
0
–5
–10
– Change in Output Voltage – mV∆V
–15
O
–20 –25
4 4.5 5 6 6.5 7 7.5
LINE REGULATION
TPS7201 With
VO Programmed to 2.5 V
TPS7248
TPS7250
8 8.5 9.5 105.5 9
VI – Input Voltage – V
Figure 13
LOAD REGULATION
50
TA = 25°C
40
30 20 10
0 –10 –20
– Change in Output Voltage – mV∆V
–30
O
–40 –50
TPS7225
TPS7248
TPS7250
0 50 100 150 200 250
IO – Output Current – mA
Figure 15
TPS7233
POWER-GOOD (PG) VOLTAGE
6
TA = 25°C PG Pulled Up to VI With 5 kResistor
V
I
– Power-Good (PG) Voltage – V
GND
O(PG)
V
0
92 93 94 95
VO – Output Voltage – %
VO as a percent of VOnom.
Figure 14
vs
OUTPUT VOLTAGE
96 98
Figure 16
97
22
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
POWER-GOOD (PG) ON-RESISTANCE
vs
INPUT VOLTAGE
100
– Power-Good (PG) On-Resistance – k
DS(on)
r
TA = 25°C
10
1
0
1 1.5 2 2.5 3 3.5 4
VI – Input Voltage – V
Figure 17
MINIMUM INPUT VOLTAGE FOR VALID PG
1.3
1.125
1.12
1.115
1.11
1.105
– Minimum Input Voltage for Valid PG
1.1
I
V
1.095
4.5 5
–40 – 20 0 20 40 60 80 100 120 140
OUTPUT VOLTAGE RESPONSE FROM
ENABLE (EN)
TA = 25°C CI = 0 CO = 4.7 µF (CSR = 1 )
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – ° C
Figure 18
10
5
– EN Voltage – V
0
VO nom
(Values Vary With
– Output Voltage – V
Selection of Device)
O
V
0 50 100 150
t – Time – µs
Figure 19
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
I(EN)
V
23
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
TPS7201 (WITH VO PROGRAMMED TO 2.5 V), TPS7233
LOAD TRANSIENT RESPONSE
200
100
0
– Change in Output Voltage – mV∆V
O
– Change in Output Voltage – mV∆V
O
–100
–200
200
100
–100
–200
TA = 25°C VI = 6 V CI = 0 CO = 4.7 µF (CSR = 1 )
105
55
5
– Output Current – mA
O
0 100 200 300 400 500
t – Time – µs
I
Figure 20
TPS7248/TPS7250
LOAD TRANSIENT RESPONSE
0
TA = 25°C VI = 6 V CI = 0 CO = 4.7 µF (CSR = 1 )
105
24
0 100 200 300 400 500
t – Time – µs
Figure 21
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
55
5
– Output Current – mA
O
I
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
TPS7201 WITH VO PROGRAMMED TO 2.5 V
LINE TRANSIENT RESPONSE
100
50
0
– Change in Output Voltage – mV∆V
– Change in Output Voltage – mV∆V
O
O
–50
–100
200
100
–50
–100
TA = 25°C CI = 0 CO = 4.7 µF (CSR = 1 )
LINE TRANSIENT RESPONSE
0
0 100 200 300 400
t – Time – µs
Figure 22
TPS7233
TA = 25°C CI = 0 CO = 4.7 µF (CSR = 1 )
6.5
6.25
6
6.5
– Input Voltage – V
I
V
0 100 200 300 400 500
t – Time – µs
Figure 23
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
6.25
6
5.75
– Input Voltage – V
I
V
25
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
TPS7248/TPS7250
LINE TRANSIENT RESPONSE
100
50
0
–50
TA = 25°C CI = 0 CO = 4.7 µF (CSR = 1 )
t – Time – µs
– Change in Output Voltage – mV∆V
–100
O
0 100 200 300 400 500
6.5
6.25
6
– Input Voltage – V
I
V
RIPPLE REJECTION
vs
FREQUENCY
60
TPS7233
50
40
TPS7248/
TPS7250
30
20
Ripple Rejection – dB
10
0
10 100 1 K 10 K 100 K 1 M 10 M
TA = 25°C No Input Capacitance Added VI = VO + 1 V IO = 100 mA CO = 4.7 µF (CSR = 1 )
TPS7201 With VO Programmed to 2.5 V
f – Frequency – Hz
Figure 25
Figure 24
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
10
Hzµ V/
1
0.1
Output Spectral Noise Density –
CO = 100 µF (CSR = 1 )
0.01 10 100 1 k 10 k 100 k
TA = 25°C No Input Capacitance Added VI = VO + 1 V
CO = 4.7 µF (CSR = 1 )
CO = 10 µF (CSR = 1 )
f – Frequency – Hz
Figure 26
26
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
TYPICAL CHARACTERISTICS
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)
vs
OUTPUT CURRENT
100
Region of Instability
10
1
TA = 25°C
0.1
CSR – Compensation Series Resistance –
0.01
Region of Instability
0 50 100 150 200 250
VI = VO + 1 V CO = 4.7 µF No Added Ceramic Capacitance No Input Capacitance Added
IO – Output Current – mA
Figure 27
COMPENSATION SERIES RESISTANCE (CSR)
TYPICAL REGIONS OF STABILITY
vs
ADDED CERAMIC CAPACITANCE
100
Region of
Instability
10
1
0.1
CSR – Compensation Series Resistance –
0.01 0 0.1 0.2 0.3 0.4 0.5
Added Ceramic Capacitance – µF
TA = 25°C VI = VO + 1 V IO = 250 mA CO = 4.7 µF No Input Capacitor Added
Region of Instability
0.6 0.7 0.8 0.9 1
Figure 28
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)
COMPENSATION SERIES RESISTANCE (CSR)
vs
OUTPUT CURRENT
100
Region of Instability
10
TA = 25°C
1
0.1
CSR – Compensation Series Resistance –
0.01 0 50 100 150 200 250
VI = VO + 1 V CO = 10 µF No Added Ceramic Capacitance No Input Capacitor Added
Region of Instability
IO – Output Current – mA
100
10
1
0.1
CSR – Compensation Series Resistance –
0.01
Figure 29
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally , and PWB trace resistance to CO.
TYPICAL REGIONS OF STABILITY
vs
ADDED CERAMIC CAPACITANCE
Region of Instability
0 0.1 0.2 0.3 0.4 0.5
Added Ceramic Capacitance – µF
TA = 25°C VI = VO + 1 V IO = 250 mA CO = 10 µF No Input Capacitor Added
Region of Instability
0.6 0.7 0.8 0.9 1
Figure 30
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
27
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
APPLICATION INFORMATION
The design of the TPS72xx family of low-dropout (LDO) regulators is based on the higher-current TPS71xx family . These new families of regulators have been optimized for use in battery-operated equipment and feature extremely low dropout voltages, low supply currents that remain constant over the full-output-current range of the device, and an enable input to reduce supply currents to less than 0.5 µA when the regulator is turned off.
device operation
The TPS72xx uses a PMOS pass element to dramatically reduce both dropout voltage and supply current over more conventional PNP-pass-element LDO designs. The PMOS transistor is a voltage-controlled device that, unlike a PNP transistor, does not require increased drive current as output current increases. Supply current in the TPS72xx is essentially constant from no-load to maximum.
Current limiting and thermal protection prevent damage by excessive output current and/or power dissipation. The device switches into a constant-current mode at approximately 1 A; further load increases reduce the output voltage instead of increasing the output current. The thermal protection shuts the regulator off if the junction temperature rises above 165°C. Recovery is automatic when the junction temperature drops approximately 5°C below the high temperature trip point. The PMOS pass element includes a back diode that safely conducts reverse current when the input voltage level drops below the output voltage level.
A logic high on the enable input, EN EN
should be grounded in applications where the shutdown feature is not used.
Power good (PG) is an open-drain output signal used to indicate output-voltage status. A comparator circuit continuously monitors the output voltage. When the output drops to approximately 95% of its nominal regulated value, the comparator turns on and pulls PG low.
Transient loads or line pulses can also cause activation of PG if proper care is not taken in selecting the input and output capacitors. Load transients that are faster than 5 µs can cause a signal on PG if high-ESR output capacitors (greater than approximately 7 ) are used. A 1-µs transient causes a PG signal when using an output capacitor with greater than 3.5 of ESR. It is interesting to note that the output-voltage spike during the transient can drop well below the reset threshold and still not trip if the transient duration is short. A 1-µs transient must drop at least 500 mV below the threshold before tripping the PG circuit. A 2-µs transient trips PG at just 400 mV below the threshold. Lower-ESR output capacitors help by reducing the drop in output voltage during a transient and should be used when fast transients are expected.
A typical application circuit is shown in Figure 31.
, shuts off the output and reduces the supply current to less than 0.5 µA.
28
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
APPLICATION INFORMATION
TPS72xx
(see Note A)
V
I
C1
0.1 µF
NOTE A: TPS7225, TPS7228†, TPS7230, TPS7233, TPS7248,
TPS7250 (fixed-voltage options).
This device is in the product preview stage of development. Please contact the local TI sales office for availability.
5
IN
6
IN
SENSE
4
EN
GND
3
PG
OUT OUT
2 1 7 8
PG
250 k
V
O
+
10 µF
CSR = 1
Figure 31. Typical Application Circuit
external capacitor requirements
Although not required, a 0.047-µF to 0.1-µF ceramic bypass input capacitor , connected between IN and GND and located close to the TPS72xx, is recommended to improve transient response and noise rejection. A higher-value electrolytic input capacitor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches from the power source.
An output capacitor is required to stabilize the internal feedback loop. For most applications, a 10-µF to 15-µF solid-tantalum capacitor with a 0.5- resistor (see capacitor selection table) in series is sufficient. The maximum capacitor ESR should be limited to 1.3 to allow for ESR doubling at cold temperatures. Figure 32 shows the transient response of a 5-mA to 85-mA load using a 10-µF output capacitor with a total ESR of 1.7 .
A 4.7-µF solid-tantalum capacitor in series with a 1- resistor may also be used (see Figures 27 and 28) provided the ESR of the capacitor does not exceed 1 at room temperature and 2 over the full operating temperature range.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
29
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
APPLICATION INFORMATION
VI = VO + 1 V
1
V
O
IO = 85 mA
2
Ch1 50 mV 50 mA 100 µs/div
Ch 2
IO = 5 mA
Figure 32. Load Transient Response (CSR total = 1.7 ), TPS7248Q
A partial listing of surface-mount capacitors usable with the TPS72xx family is provided below. This information (along with the stability graphs, Figures 27 through 30) is included to assist the designer in selecting suitable capacitors.
CAP ACITOR SELECTION
PART NO. MFR. VALUE MAX ESR
SIZE (H × L × W)
592D156X0020R2T Sprague 15 µF, 20 V 1.1 1.2 × 7.2 × 6 595D156X0025C2T Sprague 15 µF, 25 V 1 2.5 × 7.1 × 3.2 595D106X0025C2T Sprague 10 µF, 25 V 1.2 2.5 × 7.1 × 3.2 695D106X0035G2T Sprague 10 µF, 35 V 1.3 2.5 × 7.6 × 2.5
Size is in mm. ESR is maximum resistance in ohms at 100 kHz and TA = 25°C. Listings are sorted by height.
sense-pin connection
SENSE must be connected to OUT for proper operation of the regulator. Normally this connection should be as short as possible; however, remote sense may be implemented in critical applications when proper care of the circuit path is exercised. SENSE internally connects to a high-impedance wide-bandwidth amplifier through a resistor-divider network, and any noise pickup on the PCB trace will feed through to the regulator output. SENSE must be routed to minimize noise pickup. Filtering SENSE using an RC network is not recommended because of the possibility of inducing regulator instability.
30
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
APPLICATION INFORMATION
output voltage programming
The output voltage of the TPS7201 adjustable regulator is programmed using an external resistor divider as shown in Figure 33. The output voltage is calculated using:
R1
VO+
V
@ǒ1
ref
Where
V
= 1.188 V typ (the internal reference voltage)
ref
Resistors R1 and R2 should be chosen for approximately 7-µA divider current. Lower value resistors can be used but offer no inherent advantage and waste more power. Higher values should be avoided as leakage currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 169 k to set the divider current at 7 µA and then calculate R1 using:
V
+
O
ǒ
*
V
ref
R1
)
R2
1Ǔ@R2
Ǔ
(1)
(2)
OUTPUT VOLTAGE
PROGRAMMING GUIDE
OUTPUT
VOLTAGE
(V)
2.5
3.3
3.6
6.4
1% values shown.
DIVIDER RESISTANCE
4 5
TPS7201
5
(k)
R1 R2
191 309 348 402 549 750
169 169 169 169 169 169
>2.7 V
V
I
0.1 µF
<0.4 V
IN
3
PG
OUT OUT
FB
2 8
7
1
6
IN
4
EN
GND
Figure 33. TPS7201 Adjustable LDO Regulator Programming
Power-Good Indicator
250 k
R1
R2
+
10 µF CSR = 1
V
O
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
31
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
APPLICATION INFORMATION
power dissipation and junction temperature
Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature allowable to avoid damaging the device is 150°C. These restrictions limit the power dissipation that the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, P to P
The maximum-power-dissipation limit is determined using the following equation:
D(max)
.
, and the actual dissipation, PD, which must be less than or equal
D(max)
P
D(max)
Where
T
max is the maximum allowable junction temperature, i.e.,150°C absolute maximum and 125°C
J
recommended operating temperature.
R
θJA
SOIC and 238°C/W for the 8-terminal TSSOP. T
is the ambient temperature.
A
The regulator dissipation is calculated using:
PD+
Power dissipation resulting from quiescent current is negligible.
TJmax*T
+
R
is the thermal resistance junction-to-ambient for the package, i.e., 172°C/W for the 8-terminal
ǒ
VI*
Ǔ
V
O
A
q
JA
@
I
O
regulator protection
The TPS72xx PMOS-pass transistor has a built-in back diode that safely conducts reverse currents when the input voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally limited. If extended reverse voltage is anticipated, external limiting might be appropriate.
The TPS72xx also features internal current limiting and thermal protection. During normal operation, the TPS72xx limits output current to approximately 1 A. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. If the temperature of the device exceeds 165°C, thermal-protection circuitry shuts it down. Once the device has cooled, regulator operation resumes.
32
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
MECHANICAL DATA
D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
0.050 (1,27)
14
1
0.069 (1,75) MAX
A
0.020 (0,51)
0.014 (0,35)
0.010 (0,25)
0.004 (0,10)
DIM
8
7
PINS **
0.010 (0,25)
0.157 (4,00)
0.150 (3,81)
M
0.244 (6,20)
0.228 (5,80)
Seating Plane
0.004 (0,10)
8
14
0.008 (0,20) NOM
0°–8°
16
Gage Plane
0.010 (0,25)
0.044 (1,12)
0.016 (0,40)
A MAX
A MIN
NOTES: B. All linear dimensions are in inches (millimeters).
C. This drawing is subject to change without notice. D. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). E. Falls within JEDEC MS-012
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
0.197
(5,00)
0.189
(4,80)
0.344
(8,75)
0.337
(8,55)
0.394
(10,00)
0.386
(9,80)
4040047/D 10/96
33
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
MECHANICAL DATA
P (R-PDIP-T8) PLASTIC DUAL-IN-LINE PACKAGE
0.400 (10,60)
0.355 (9,02)
58
0.260 (6,60)
0.240 (6,10)
41
0.070 (1,78) MAX
0.020 (0,51) MIN
0.200 (5,08) MAX
0.125 (3,18) MIN
0.100 (2,54)
0.021 (0,53)
0.015 (0,38)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001
0.010 (0,25)
M
0.310 (7,87)
0.290 (7,37)
Seating Plane
0°–15°
0.010 (0,25) NOM
4040082/B 03/95
34
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
MECHANICAL DATA
PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
0,65
14
1
1,20 MAX
0,30 0,19
8
6,60
4,50 4,30
6,20
7
A
0,15 0,05
M
0,10
Seating Plane
0,10
0,15 NOM
Gage Plane
0,25
0°–8°
0,75 0,50
PINS **
DIM
A MAX
A MIN
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion not to exceed 0,15. D. Falls within JEDEC MO-153
8
3,10
2,90
14
5,10
4,90
16
5,10
20
6,60
6,404,90
24
7,90
7,70
28
9,80
9,60
4040064/E 08/96
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
35
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