Texas Instruments TPS7433DR, TPS7430DR, TPS7433D, TPS7430D, TPS7425DR Datasheet

TPS7415, TPS7418, TPS7425, TPS7430, TPS7433

FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR

200-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS212 – DECEMBER 1999

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Fast Transient Response Using Small
Output Capacitor (10 µF)

D

200-mA Low-Dropout Voltage Regulator

D

Available in 1.5-V, 1.8-V, 2.5-V, 3-V and 3.3-V

D

Dropout Voltage Down to 170 mV at 200 mA
(TPS7433)

D

3% Tolerance Over Specified Conditions

D

8-Pin SOIC Package

D

Thermal Shutdown Protection

description

This device is designed to have a fast transient response and be stable with 1-µF capacitors. This combination
provides high performance at a reasonable cost.

Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 170 mV
at an output current of 200-mA for the TPS7433). This LDO family also features a sleep mode; applying a TTL
high signal to EN (enable) shuts down the regulator, reducing the quiescent current to less than 1 µA at
TJ = 25°C.

The TPS74xx is offered in 1.5-V, 1.8-V, 2.5-V, 3-V, and 3.3-V. Output voltage tolerance is specified as a
maximum of 3% over line, load, and temperature ranges. The TPS74xx family is available in 8 pin SOIC
package.

–50

200

50

0

100

0

t – Time – µs

CO = 10 µF

TPS7418

LOAD TRANSIENT RESPONSE

0 300200100 400 500 700600 800 900 1000

I – Output Current – mA

O

V

O

– Change in

∆

Output Voltage – mV

di/dt =

TJ – Junction Temperature – °C

100

0

150

50

–50

300

200

250

– Dropout Voltage – mV
V

DO

TPS7433

DROPOUT VOLTAGE

vs

JUNCTION TEMPERATURE

–25 250 50 75 100 125 150

IO = 50 mA

IO = 1 mA

IO = 75 mA

IO = 200 mA

VI = 3.2 V

200 mA

25 µs

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.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

Copyright  1999, Texas Instruments Incorporated

1
2
3
4

8
7
6
5

EN
NC
NC

IN

SENSE
OUT
GND
IN

D PACKAGE

(TOP VIEW)

NC – No internal connection

TPS7415, TPS7418, TPS7425, TPS7430, TPS7433
FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR
200-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS212 – DECEMBER 1999

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

AVAILABLE OPTIONS

OUTPUT VOLTAGE

(V)

PACKAGED DEVICES

T

J

TYP

SOIC

(D)

3.3 TPS7433D
3 TPS7430D

–40°C to 125°C

2.5 TPS7425D

1.8 TPS7418D

1.5 TPS7415D

The D package is available taped and reeled. Add an R suffix to the device type (e.g.,
TPS7433DR).

†

See application information section for capacitor selection details.

OUT

4

1

IN

EN

GND

6

8

7

V

I

1 µF

ESR

V

O

1 µF

+

TPS74xx

C

O

†

IN

5

SENSE SENSE

Figure 1. Typical Application Configuration

functional block diagram

_
+

V

ref

OUT

EN

GND

R1

R2

IN

SENSE

TPS7415, TPS7418, TPS7425, TPS7430, TPS7433

FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR

200-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS212 – DECEMBER 1999

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NAME NO.

I/O

DESCRIPTION

EN 1 I Enable input
GND 6 Regulator ground
IN 4, 5 I Input voltage
NC 2, 3 Not connected
OUT 7 O Regulated output voltage
SENSE 8 I Sense

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Ĕ

Input voltage range‡, VI –0.3 V to 8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range at EN

–0.3 V to VI + 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Peak output current Internally limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation See dissipation rating tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating virtual junction temperature range, TJ –40°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 150°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 terminal ground.

DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERATURES

PACKAGE

AIR FLOW

(CFM)

TA < 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

0 568 mW 5.68 mW/°C 312 mW 227 mW

D

250 904 mW 9.04 mW/°C 497 mW 361 mW

recommended operating conditions

MIN MAX UNIT

Input voltage, V

I

§

2.5 7 V
Output current, IO (see Note 1) 0 200 mA
Operating virtual junction temperature, TJ (see Note 1) –40 125 °C

§

To calculate the minimum input voltage for your maximum output current, use the following equation: V

I(min)

= V

O(max)

+ V

DO(max load)

.

NOTE 1: Continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the

device operate under conditions beyond those specified in this table for extended periods of time.

TPS7415, TPS7418, TPS7425, TPS7430, TPS7433
FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR
200-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS212 – DECEMBER 1999

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range,
V

i

= V

O(typ)

+ 1 V, I

O

= 1 mA, EN = 0 V, CO = 1 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS TEST CONDITIONS MIN TYP MAX UNIT

TJ = 25°C 1.5

TPS7415

2.5 V

<

V

I

< 7

V

TJ = –40°C to 125°C 1.455 1.545
TJ = 25°C 1.8

TPS7418

2.8 V

<

V

I

< 7

V

TJ = –40°C to 125°C 1.746 1.854

Output voltage (10 µA to 200 mA load)

TJ = 25°C 2.5

g( µ )

(see Note 2)

TPS7425

3.5 V

<

V

I

< 7

V

TJ = –40°C to 125°C 2.425 2.575

V

TJ = 25°C 3.0

TPS7430

4.0 V

<

V

I

< 7

V

TJ = –40°C to 125°C 2.910 3.090
TJ = 25°C 3.3

TPS7433

4.3 V

<

V

I

< 7

V

TJ = –40°C to 125°C 3.201 3.399
TJ = 25°C 80

I

O

= 1 mA, EN = 0

V

TJ = –40°C to 125°C 115

µ

A

TJ = 25°C 550

Quiescent current (GND current) (See Note 2)

I

O

=

100 mA

, EN = 0

V

TJ = –40°C to 125°C 850

µ

A

TJ = 25°C 1300

I

O

=

200 mA

, EN = 0

V

TJ = –40°C to 125°C 1500

µ

A

Output voltage line regulation (∆VO/V

O

)

(see Notes 2 and 3)

VO + 1 V < VI ≤ 7 V, TJ = 25°C 0.06 %/V
Load regulation 5 mV
Output noise voltage

BW = 300 Hz to 50 kHz,

TJ = 25°C

CO = 1 µF,

190 µVrms

Output current Limit VO = 0 V 500 750 mA
Thermal shutdown junction temperature 150 °C

2.5 V < VI < 7 V,

TJ = 25°C

EN = V

I,

1 µA

Standby current

2.5 V < VI < 7 V,

TJ = –40°C to 125°C

EN = V

I,

3 µA

High level enable input voltage 2 V
Low level enable input voltage 0.7 V

p

EN = 0 V –1 1

Input current (EN)

EN = V

I

–1 1

µ

A

Power supply ripple rejection (see Note 2)

f = 100 Hz,

TJ = 25°C

CO = 1 µF,

55 dB

IO = 200 mA, TJ = 25°C 180

p

TPS7430

IO = 200 mA, TJ = –40°C to 125°C 350

Dropout voltage (see Note 4)

IO = 200 mA, TJ = 25°C 170

mV

TPS7433

IO = 200 mA, TJ = –40°C to 125°C 315

NOTES: 2. Minimum IN operating voltage is 2.5 V or V

O(typ)

+ 1 V, whichever is greater. Maximum IN voltage 7 V.

3. If VO = 1.5 V then V

imax

= 7 V, V

imin

= 2.5 V:

4. IN voltage equals VO(Typ) – 100 mV; TPS7430 and TPS7433 dropout limited by input voltage range limitations (i.e., TPS7430 input
voltage needs to drop to 2.9 V for purpose of this test).

Line Reg. (mV)

+ǒ%ńVǓ

V

O

ǒ

V

imax

*

2.5 V

Ǔ

100

1000

If VO ≥ 2.5 V then V

imax

= 7 V, V

imin

= VO + 1 V:

Line Reg. (mV)

+ǒ%ńVǓ

V

O

ǒ

V

imax

*ǒVO)

1V

Ǔ

Ǔ

100

1000

TPS7415, TPS7418, TPS7425, TPS7430, TPS7433

FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR

200-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS212 – DECEMBER 1999

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Table of Graphs

FIGURE

p

vs Output current 2, 3, 4

VOOutput voltage

vs Junction temperature 5, 6
Ground current vs Junction temperature 7, 8
Power supply ripple rejection vs Frequency 12
Output noise vs Frequency 9

Z

o

Output impedance vs Frequency 10

V

DO

Dropout voltage vs Junction temperature 11
Line transient response 13, 15
Load transient response 14, 16
Output voltage vs Time 17
(Stability) Equivalent series resistance (ESR) vs Output current 19

TYPICAL CHARACTERISTICS

Figure 2

IO – Output Current – mA

TPS7418

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

50 100

1.805

1.800

1.795
150 250

1.810

0 200

– Output Voltage – V
V

O

VI = 2.8 V
TA = 25°C

Figure 3

IO – Output Current – mA

3.300
50 100 150 250

3.310

0 200

VI = 4.3 V
TA = 25°C

– Output Voltage – V
V

O

TPS7433

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

3.305