1

FEATURES

DESCRIPTION

NC

NC

1GND

1IN

1IN

NC

NC

2GND

2IN

2IN

NC

NC

NC=Nointernalconnection

NC

NC

1FB/NC

1OUT

1OUT

NC

NC

NC

2OUT

2OUT

NC

NC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1EN

2EN

2RESET

1RESET

PWPPACKAGE

(TOPVIEW)

0

20

200

40 60 80 100 120 140 160 180

LINETRANSIENTRESPONSE

V

=3.3V

C =10 F

T =25 C

OUT

L

A

m

°

5.3

4.3

10

0

-

10

t

Time

s

-

- m

10

3

10

2

10

1

10

-

1

10

-

2

10

-

60 -40 -20 0

20

40 60 80 100 120 140

T

Free-AirTemperature

C

-

°

V

=3.3V

C

=10 F

OUT

OUT

m

I

=0

OUT

I

=10mA

OUT

I

=1A

OUT

DROPOUTVOLTAGE

vsFREE-AIRTEMPERATURE

TPS767D3xx

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

Because the PMOS device behaves as a low-value

23

• Dual Output Voltages for Split-Supply

resistor, the dropout voltage is very low (350mV

Applications

typically

at

an

output

current

of

1A

for

the

• Output Current Range of 0mA to 1.0A per

TPS767D325) and is directly proportional to the

Regulator

output current. Additionally, since the PMOS pass

• 3.3V/2.5V, 3.3V/1.8V, and 3.3V/Adjustable

element is a voltage-driven device, the quiescent

Output

current is very low and independent of output loading

(typically 85

µA over the full range of output current,

• Fast-Transient Response

0mA to 1A). These two key specifications yield a

• 2% Tolerance Over Load and Temperature

significant

improvement

in

operating

life

for

• Dropout Voltage Typically 350mV at 1A

battery-powered systems. This LDO family also

features a sleep mode; applying a TTL high signal to

• Ultra-low 85µA Typical Quiescent Current

EN (enable) shuts down the regulator, reducing the

• 1µA Quiescent Current During Shutdown

quiescent current to 1

µA at T

• Dual Open-Drain Power-On Reset with 200ms

The RESET output of the TPS767D3xx initiates a

Delay for Each Regulator

reset in microcomputer and microprocessor systems

• 28-Pin PowerPAD™ TSSOP Package

in the event of an undervoltage condition. An internal

• Thermal Shutdown Protection for Each

comparator in the TPS767D3xx monitors the output

voltage of the regulator to detect an undervoltage

Regulator

condition on the regulated output voltage.

The TPS767D3xx is offered in 1.8V, 2.5V, and 3.3V

fixed-voltage versions and in an adjustable version

The TPS767D3xx family of dual voltage regulators

(programmable over the range of 1.5V to 5.5V).

offers fast transient response, low dropout voltages

Output voltage tolerance is specified as a maximum

and

dual

outputs

in

a

compact

package

and

of 2% over line, load, and temperature ranges. The

incorporating stability with 10

µF low ESR output

TPS767D3xx family is available in a 28-pin PWP

capacitors.

TSSOP package. They operate over a junction

The TPS767D3xx family of dual voltage regulators is

temperature range of –40°C to +125°C.

designed primarily for DSP applications. These

devices can be used in any mixed-output voltage

application, with each regulator supporting up to 1A.

Dual active-low reset signals allow resetting of

core-logic and I/O separately.

1

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.

2

PowerPAD is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 1999–2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.