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

T

J

= 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

C

O

= 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 =

T

J

– 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

I

O

= 50 mA

I

O

= 1 mA

I

O

= 75 mA

I

O

= 200 mA

V

I

= 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

‡

, V

I

–0.3 V to 8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range at EN

–0.3 V to V

I

+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

Operating virtual junction temperature range, T

J

–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)

T

A

< 25°C

POWER RATING

DERATING FACTOR

ABOVE T

A

= 25°C

T

A

= 70°C

POWER RATING

T

A

= 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, I

O

(see Note 1) 0 200 mA

Operating virtual junction temperature, T

J

(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, C

O

= 1 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS TEST CONDITIONS MIN TYP MAX UNIT

T

J

= 25°C 1.5

TPS7415

2

.

5

V

<

V

I

<

7

V

T

J

= –40°C to 125°C 1.455 1.545

T

J

= 25°C 1.8

TPS7418

2

.

8

V

<

V

I

<

7

V

T

J

= –40°C to 125°C 1.746 1.854

Output voltage (10 µA to 200 mA load)

T

J

= 25°C 2.5

g( µ )

(see Note 2)

TPS7425

3

.

5

V

<

V

I

<

7

V

T

J

= –40°C to 125°C 2.425 2.575

V

T

J

= 25°C 3.0

TPS7430

4

.

0

V

<

V

I

<

7

V

T

J

= –40°C to 125°C 2.910 3.090

T

J

= 25°C 3.3

TPS7433

4

.

3

V

<

V

I

<

7

V

T

J

= –40°C to 125°C 3.201 3.399

T

J

= 25°C 80

I

O

=

1

mA

,

EN

=

0

V

T

J

= –40°C to 125°C 115

µ

A

T

J

= 25°C 550

Q

u

iescent

c

u

rrent

(GND

c

u

rrent)

(See

Note

2)

I

O

=

100

mA

,

EN

=

0

V

T

J

= –40°C to 125°C 850

µ

A

T

J

= 25°C 1300

I

O

=

200

mA

,

EN

=

0

V

T

J

= –40°C to 125°C 1500

µ

A

Output voltage line regulation (∆V

O

/V

O

)

(see Notes 2 and 3)

V

O

+ 1 V < V

I

≤ 7 V, T

J

= 25°C 0.06 %/V

Load regulation 5 mV

Output noise voltage

BW = 300 Hz to 50 kHz,

T

J

= 25°C

C

O

= 1 µF,

190 µVrms

Output current Limit V

O

= 0 V 500 750 mA

Thermal shutdown junction temperature 150 °C

2.5 V < V

I

< 7 V,

T

J

= 25°C

EN = V

I,

1 µA

Standb

y

c

u

rrent

2.5 V < V

I

< 7 V,

T

J

= –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

Inp

u

t

c

u

rrent

(EN)

EN = V

I

–1 1

µ

A

Power supply ripple rejection (see Note 2)

f = 100 Hz,

T

J

= 25°C

C

O

= 1 µF,

55 dB

I

O

= 200 mA, T

J

= 25°C 180

p

TPS7430

I

O

= 200 mA, T

J

= –40°C to 125°C 350

Dropo

u

t

v

oltage

(see

Note

4)

I

O

= 200 mA, T

J

= 25°C 170

mV

TPS7433

I

O

= 200 mA, T

J

= –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 V

O

= 1.5 V then V

imax

= 7 V, V

imin

= 2.5 V:

4. IN voltage equals V

O

(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

%

ń

V

Ǔ

V

O

ǒ

V

imax

*

2.5 V

Ǔ

100

1000

If V

O

≥ 2.5 V then V

imax

= 7 V, V

imin

= V

O

+ 1 V:

Line Reg. (mV)

+

ǒ

%

ń

V

Ǔ

V

O

ǒ

V

imax

*

ǒ

V

O

)

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

V

O

O

u

tp

u

t

v

oltage

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

I

O

– 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

V

I

= 2.8 V

T

A

= 25°C

Figure 3

I

O

– Output Current – mA

3.300

50 100 150 250

3.310

0 200

V

I

= 4.3 V

T

A

= 25°C

– Output Voltage – V

V

O

TPS7433

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

3.305