TPS767D301, TPS767D318, TPS767D325

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

SLVS209B – JULY 1999 – REVISED APRIL 2000

2

POST OFFICE BOX 655303

description (continued)

The TPS767D3xx family of dual voltage regulators is designed primarily for DSP applications. These devices

can be used in any mixed-output voltage application, with each regulator supporting up to 1 A. Dual active-low

reset signals allow resetting of core-logic and I/O separately.

Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 350 mV

at an output current of 1 A for the TPS767D325) and is directly proportional to the output current. Additionally,

since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent

of output loading (typically 85

µA over the full range of output current, 0 mA to 1 A). These two key specifications

yield a significant improvement in operating life for battery-powered systems. 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 1

The RESET output of the TPS767D3xx initiates a reset in microcomputer and microprocessor systems in the

event of an undervoltage condition. An internal comparator in the TPS767D3xx monitors the output voltage of

the regulator to detect an undervoltage condition on the regulated output voltage.

The TPS767D3xx is offered in 1.8-V, 2.5-V, and 3.3-V fixed-voltage versions and in an adjustable version

(programmable over the range of 1.5 V to 5.5 V). Output voltage tolerance is specified as a maximum of 2%

over line, load, and temperature ranges. The TPS767D3xx family is available in 28 pin PWP TSSOP package.

They operate over a junction temperature range of –40

°C to 125°C.

AVAILABLE OPTIONS

TA

REGULATOR 1

VO (V)

REGULATOR 2

VO (V)

TSSOP

(PWP)

Adj (1.5 – 5.5 V)

3.3 V

TPS767D301PWP

–40

°C to 125°C

1.8 V

3.3 V

TPS767D318PWP

2.5 V

3.3 V

TPS767D325PWP

The TPS767D301 is adjustable using an external resistor divider (see application

information). The PWP packages are available taped and reeled. Add an R suffix

to the device type (e.g., TPS767D301PWPR).

RESET

OUT

OUT

6

5

4

IN

IN

EN

GND

3

28

24

23

VI

C1

0.1

µF

50 V

RESET

VO

10

µF

+

TPS767D3xx

CO

250 k

Ω

Figure 1. Typical Application Circuit (Fixed Versions) for Single Channel