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
050100150
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
200250
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.
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 kΩ
V
O
C
O
(see Note A)
+
10 µF
CSR = 1 Ω
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
UNITR1R2
Ω
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
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.
DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERA TURE (see Note 1 and Figure 3)
T
≤ 25°CDERATING FACTORT
POWER RATINGABOVE 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°CDERATING FACTORT
POWER RATINGABOVE 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°CT
464 mW
°
336 mW
= 70°CT
1320 mW
°
1856 mW
= 85°CT
377 mW
273 mW
= 85°CT
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
255075100
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
125150
MAXIMUM CONTINUOUS DISSIPATION
vs
CASE TEMPERATURE
3000
2500
2000
1500
1000
500
– Maximum Continuous Dissipation – mW
D
P
0
255075100
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
125150
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
MINMAXUNIT
TPS7201Q310
TPS7225Q3.6510
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
should be used to calculate VDO before applying the above equation. The equation for
‡
TBD10
V
2V
0.5V
0250mA
–40125°C
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
PARAMETER
TEST CONDITIONS
‡
T
UNIT
,
,
Ground current (active mode)
EN≤0.5V,
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 Ω), 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°C3175 ppm/°C
Thermal shutdown junction temperature165°C
y mode
ow (active mode
EN hysteresis voltage25°C50mV
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°C180225
–40°C to 125°C325
25°C0.5
–40°C to 125°C1
25°C0.61
–40°C to 125°C1.5
25°C0.5
–40°C to 125°C1
25°C0.5
–40°C to 125°C0.5
°
–
–40°C to 125°C0.5
–40°C to 125°C–0.50.5
–40°C to 125°C2.5
–40°C to 125°C1.9
°
25°C0.5
25°C–0.50.5
25°C1.92.5
25°C1.11.5
TPS72xxQ
MINTYPMAX
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
Ω
Input regulation
I
,
µ
O
,
mV
O
,
I
,
Output regulation
mV
O
µ,
I
,
I
A
Ripple rejection
f
120 H
dB
O
,
†
CSR
†
Ω
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 Ω), 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 densityf = 120 Hz25°C2
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 mA25°C1.188V
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 mA25°C1
VI = 5.9 V,50 µA ≤ IO ≤ 250 mA25°C0.8
CO = 4.7 µF25°C235
CO = 10 µF25°C190
CO = 100 µF25°C125
PG
=
I
–40°C to 125°C1.1521.224V
–40°C to 125°C3175 ppm/°C
25°C1.62.7
–40°C to 125°C4.5
25°C23
–40°C to 125°C36
25°C1525
–40°C to 125°C36
25°C1727
–40°C to 125°C43
25°C4960
–40°C to 125°C32
25°C4550
–40°C to 125°C30
–40°C to 125°C
25°C12mV
25°C0.10.4
–40°C to 125°C0.4
25°C–100.110
–40°C to 125°C–2020
increases (see Figure 10) to a point such that the resulting
DS(on)
TPS7201Q
MINTYPMAX
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
,
Ω
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
†
Ω
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 Ω), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral densityf = 120 Hz25°C2
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 mA25°C2.5
3.5 V ≤ VI ≤ 10 V,5 mA ≤ IO ≤ 250 mA–40°C to 125°C2.452.55
=
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°C560850mV
–40°C to 125°C1.1V
25°C2.243.4
–40°C to 125°C3.84
25°C927
–40°C to 125°C33
25°C2836
–40°C to 125°C60
25°C2441
–40°C to 125°C73
25°C4758
–40°C to 125°C45
25°C4046
–40°C to 125°C38
25°C248
25°C200
25°C130
–40°C to 125°C
25°C50mV
25°C0.30.44
–40°C to 125°C0.5
TPS7225Q
MINTYPMAX
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
,
Ω
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
†
Ω
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
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 mA25°C2.75
3.75 V ≤VI ≤ 10 V,5 mA ≤ IO ≤ 250 mA–40°C to 125° C2.692.81
= 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°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
–40°C to 125°CTBD
25°CTBD
25°CTBD
25°CTBD
–40°C to 125°CTBDV
25°CTBDmV
25°CTBD
–40°C to 125°CTBD
TPS7228Q
MINTYPMAX
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
,
Ω
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
†
Ω
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 Ω), SENSE
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 mA25°C3
4 V ≤VI ≤ 10 V,5 mA ≤ IO ≤ 250 mA–40°C to 125° C2.943.06
=
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°C145185
–40°C to 125°C270
25°C390502
–40°C to 125°C900
25°C1.562.01
–40°C to 125°C3.6
25°C927
–40°C to 125°C33
25°C3445
–40°C to 125°C74
25°C4260
–40°C to 125°C98
25°C4556
–40°C to 125°C44
25°C4045
–40°C to 125°C38
25°C256
25°C206
25°C132
–40°C to 125°C
25°C50mV
25°C0.250.44
–40°C to 125°C0.44
TPS7230Q
MINTYPMAX
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
,
Ω
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
†
Ω
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 Ω), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral densityf = 120 Hz25°C2
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 mA25°C3.3
4.3 V ≤ VI ≤ 10 V,5 mA ≤ IO ≤ 250 mA–40°C to 125° C3.233.37
= 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°C1420
–40°C to 125°C30
25°C140180
–40°C to 125°C232
25°C360460
–40°C to 125°C610
25°C1.51.84
–40°C to 125°C2.5
25°C825
–40°C to 125°C33
25°C3242
–40°C to 125°C71
25°C4155
–40°C to 125°C98
25°C4052
–40°C to 125°C38
25°C3544
–40°C to 125°C33
25°C265
25°C212
25°C135
–40°C to 125°C
25°C32mV
25°C0.220.4
–40°C to 125°C0.4
TPS7233Q
MINTYPMAX
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
,
Ω
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
†
Ω
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
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 mA25°C4.85
5.85 V ≤VI ≤ 10 V,5 mA ≤ IO ≤ 250 mA–40°C to 125° C4.754.95
= 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°C1019
–40°C to 125°C30
25°C90100
–40°C to 125°C150
25°C216250
–40°C to 125°C285
25°C0.81
–40°C to 125°C1.4
25°C34
–40°C to 125°C50
25°C4355
–40°C to 125°C95
25°C5575
–40°C to 125°C135
25°C4253
–40°C to 125°C36
25°C3646
–40°C to 125°C34
25°C370
25°C290
25°C168
–40°C to 125°C
25°C50mV
25°C0.20.4
–40°C to 125°C0.4
TPS7248Q
MINTYPMAX
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
,
Ω
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
†
Ω
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 Ω), SENSE
I
shorted to OUT (unless otherwise noted)
J
p
ropout voltage
p
p
pp
Output noise spectral densityf = 120 Hz25°C2
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 mA25°C5
6 V ≤VI ≤ 10 V,5 mA ≤ IO ≤ 250 mA–40°C to 125° C4.95.1
= 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°C812
–40°C to 125°C30
25°C7685
–40°C to 125°C136
25°C190206
–40°C to 125°C312
25°C0.760.825
–40°C to 125°C1.25
25°C28
–40°C to 125°C35
25°C4661
–40°C to 125°C100
25°C5979
–40°C to 125°C150
25°C4152
–40°C to 125°C37
25°C3646
–40°C to 125°C32
25°C390
25°C300
25°C175
–40°C to 125°C
25°C50mV
25°C0.190.4
–40°C to 125°C0.4
TPS7250Q
MINTYPMAX
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 Ω), TJ = 25°C, SENSE/FB
shorted to OUT (unless otherwise noted)
TPS72xxY
MINTYPMAX
Ground current (active mode)
Output current limit thresholdVO = 0 V,VI = 10 V0.6A
Thermal shutdown junction temperature165°C
EN hysteresis voltage50mV
Minimum VI for active pass element1.9V
Minimum VI for valid PGIPG = 300 µA1.1V
EN ≤ 0.5 V,
0 mA ≤ IO ≤ 250 mA
electrical characteristics, IO = 10 mA, EN = 0 V, CO = 4.7 µF (CSR† = 1 Ω), TJ = 25°C, FB shorted to
OUT at device leads (unless otherwise noted)
Reference voltage (measured at FB with OUT
connected to FB)
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 mA1.188V
= 3.5 V,
=
= 3.5 V,
§
§
DS(on)
VI = 2.4 V,
VI = 2.4 V,
VI = 2.9 V,50 µA ≤ IO ≤ 250 mA1.6
VI = 3.9 V,50 µA ≤ IO ≤ 250 mA1
VI = 5.9 V,50 µA ≤ IO ≤ 250 mA0.8
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 Ω
VI = 3.5 V,Measured at V
VI = 2.13 V,IPG = 400 µA0.1V
VI = 3.5 V
VI = VO + 1 V,
MINTYPMAX
50 µA ≤ IO ≤ 100 mA2.1
100 mA ≤ IO ≤ 200 mA2.9
IO = 5 mA to 250 mA,
IO = 50 µA to 250 mA,
IO = 50 µA60
IO = 250 mA,
See Note 2
CO = 4.7 µF235
CO = 10 µF190
CO = 100 µF125
FB
increases (see Figure 10) to a point such that the resulting
DS(on)
180µA
TPS7201Y
15
17
50
µV/√Hz
12mV
0.1nA
for VI = 2.4 V, 2.9 V, 3.9 V, and
Ω
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 Ω), TJ = 25°C, FB shorted to
OUT at device leads (unless otherwise noted)
TPS7225Y
MINTYPMAX
Output voltageVI = 3.5 V,IO = 10 mA2.5V
Dropout voltage
Pass-element series resistance
Input regulationVI = 3.5 V to 10 V,50 µA ≤ IO ≤ 250 mA9mV
PG hysteresis voltageVI = 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 mA560mV
(2.97 V – VO)/IO,
IO = 250 mA
3.5 V ≤ VI ≤ 10 VIO = 5 mA to 250 mA28
3.5 V ≤ VI ≤ 10 VIO = 50 µA to 250 mA24
V
= 3.5 V,
f = 120 Hz
=
= 3.5 V,
10 Hz ≤ f ≤ 100 kHz,
CSR† = 1 Ω
VI = 2.13 VIPG = 1.2 mA0.3V
VI = 2.97 V,
IO = 50 µA58
IO = 250 mA46
CO = 4.7 µF
CO = 10 µF
CO = 100 µF
2.24Ω
248
200
130
50mV
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 Ω), TJ = 25°C, SENSE shorted
to OUT (unless otherwise noted) (continued)
TPS7228Y
MINTYPMAX
Output voltageVI = 3.75 V,IO = 10 mA2.75V
VI = 2.97 V,IO = 10 mATBD
Dropout voltage
Pass-element series resistance
Input regulationVI = 3.75 V to 10 V,50 µA ≤ IO ≤ 250 mATBDmV
PG hysteresis voltageVI = 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 mATBD
VI = 2.97 V,IO = 250 mATBD
(2.97 V – VO)/IO,
IO = 250 mA
3.75 V ≤ VI ≤ 10 V,IO = 5 mA to 250 mATBD
3.75 V ≤ VI ≤ 10 V,IO = 50 µA to 250 mATBD
V
= 3.75 V,
f = 120 Hz
=
= 3.75 V,
10 Hz ≤ f ≤ 100 kHz,
CSR† = 1 Ω
VI = 2.34 V,IPG = 1.2 mATBDV
VI = 2.97 V,
IO = 50 µATBD
IO = 250 mATBD
CO = 4.7 µF
CO = 10 µF
CO = 100 µF
TBDΩ
TBD
TBD
TBD
TBDmV
mV
µV/√Hz
µVrms
TPS7230Y
MINTYPMAX
Output voltageVI = 4 V,IO = 10 mA3V
ropout voltage
Pass-element series resistance
Input regulationVI = 4 V to 10 V,50 µA ≤ IO ≤ 250 mA9mV
PG hysteresis voltageVI = 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 mA145
VI = 2.97 V,IO = 250 mA390
(2.97 V – VO)/IO,
IO = 250 mA
4 V ≤ VI ≤ 10 VIO = 5 mA to 250 mA34
4 V ≤ VI ≤ 10 VIO = 50 µA to 250 mA41
V
= 4 V,
f = 120 Hz
=
= 4 V,
10 Hz ≤ f ≤ 100 kHz,
CSR† = 1 Ω
VI = 2.55 VIPG = 1.2 mA0.25V
VI = 2.97 V,
IO = 50 µA56
IO = 250 mA45
CO = 4.7 µF
CO = 10 µF
CO = 100 µF
1.56Ω
256
206
132
50mV
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 Ω), TJ = 25°C, SENSE shorted
to OUT (unless otherwise noted) (continued)
TPS7233Y
MINTYPMAX
Output voltageVI = 4.3 V,IO = 10 mA3.3V
VI = 3.23 V,IO = 10 mA14
Dropout voltage
Pass-element series resistance
Input regulationVI = 4.3 V to 10 V,50 µA ≤ IO ≤ 250 mA8mV
PG hysteresis voltageVI = 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 mA140
VI = 3.23 V,IO = 250 mA360
(3.23 V – VO)/IO,
PG hysteresis voltageVI = 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 mA90
VI = 4.75 V,IO = 250 mA216
(4.75 V – VO)/IO,
IO = 250 mA
5.85 V ≤ VI ≤ 10 VIO = 5 mA to 250 mA43
5.85 V ≤ VI ≤ 10 VIO = 50 µA to 250 mA55
V
= 5.85 V,
f = 120 Hz
=
= 5.85 V,
10 Hz ≤ f ≤ 100 kHz,
CSR† = 1 Ω
VI = 4.12 VIPG = 1.2 mA0.2V
VI = 4.75 V,
IO = 50 µA53
IO = 250 mA46
CO = 4.7 µF
CO = 10 µF
CO = 100 µF
0.8Ω
370
290
168
50mV
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 Ω), TJ = 25°C, SENSE shorted
to OUT (unless otherwise noted) (continued)
TPS7250Y
MINTYPMAX
Output voltageVI = 6 V,IO = 10 mA5V
VI = 4.88 VIO = 10 mA8
Dropout voltage
Pass-element series resistance
Input regulationVI = 6 V to 10 V,50 µA ≤ IO ≤ 250 mAmV
p
pp
Output noise spectral densityVI = 6 V,f = 120 Hz2
Output noise voltage
PG hysteresis voltageVI = 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 VIO = 100 mA76
VI = 4.88 V,IO = 250 mA190
(4.88 V – VO)/IO,
IO = 250 mA
6 V ≤ VI ≤ 10 V,IO = 5 mA to 250 mA46
6 V ≤ VI ≤ 10 V,IO = 50 µA to 250 mA59
V
= 6 V,
f = 120 Hz
=
= 6 V,
10 Hz ≤ f ≤ 100 kHz,
CSR† = 1 Ω
VI = 4.25 V,IPG = 1.2 mA0.19V
VI = 4.88 V,
IO = 50 µA52
IO = 250 mA46
CO = 4.7 µF
CO = 10 µF
CO = 100 µF
0.76Ω
390
300
175
50mV
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 current5
vs Input voltage6
†
∆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 currentvs Free-air temperature7
Dropout voltagevs Output current8
Change in dropout voltagevs Free-air temperature9
Dropout voltage (TPS7201 only)vs Output current10
Pass-element series resistancevs Input voltage11
Change in output voltagevs Free-air temperature12
Output voltagevs Input voltage13
Line regulationvs Input voltage14
Load regulation
(TPS7225, TPS7233, TPS7248, TPS7250)
Power-good (PG) voltagevs Output voltage16
Power-good (PG) on-resistancevs Input voltage17
Minimum input voltage for valid PGvs Free-air temperature18
Output voltage response from enable (EN)vs Time19
Load transient response (TPS7201/TPS7233)vs Time20
Load transient response (TPS7248/TPS7250)vs Time21
Line transient response (TPS7201)vs Time22
Line transient response (TPS7233)vs Time23
Line transient response (TPS7248/TPS7250)vs Time24
Ripple rejectionvs Frequency25
Output Spectral Noise Densityvs Frequency26
p
vs Input voltage15
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
TA = 25°C
No Input
Capacitance Added
VI = VO + 1 V
IO = 100 mA
CO = 4.7 µF (CSR = 1 Ω)
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 Ω)
0.01
101001 k10 k100 k
TA = 25°C
No Input Capacitance Added
VI = VO + 1 V
CO = 4.7 µF (CSR = 1 Ω)
CO = 10 µF (CSR = 1 Ω)
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 – Ω
0.01
Region of Instability
050100150200250
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 – Ω
0.01
00.1 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 0.91
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 – Ω
0.01
050100150200250
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 – Ω
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
00.1 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
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 Ω) are used. A 1-µs transient causes a PG signal when using an output
capacitor with greater than 3.5 Ω 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.
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 kΩ
V
O
+
10 µF
CSR = 1 Ω
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-Ω resistor (see capacitor selection table) in series is sufficient. The maximum
capacitor ESR should be limited to 1.3 Ω 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 Ω.
A 4.7-µF solid-tantalum capacitor in series with a 1-Ω resistor may also be used (see Figures 27 and 28)
provided the ESR of the capacitor does not exceed 1 Ω at room temperature and 2 Ω over the full operating
temperature range.
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.
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 kΩ to set the divider current at 7 µA and then calculate R1 using:
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
maxis 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
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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Copyright 1998, Texas Instruments Incorporated
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