TPS767D301Q1, TPS767D318Q1, TPS767D325Q1

DUALOUTPUT LOW DROPOUT VOLTAGE REGULATORS

SGLS231 − FEBRUARY 2004

2

POST OFFICE BOX 655303

t − Time −

µs

LOAD TRANSIENT RESPONSE

1

0.5

60

40

20

80 100

140

120

160 180 200

0

VO = 3.3 V

CL =100 µF

TA = 25°C

0

0

50

100

−50

−100

TA − Free-Air Temperature − °C

−40

0

20

120

103

−60

40

60

80 100

DROPOUT VOLTAGE

vs

FREE-AIR TEMPERATURE

102

101

100

10−1

10−2

−20

140

IO = 1 A

IO = 10 mA

IO = 0

VO = 3.3 V

CO = 10 µF

description (continued)

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.