Datasheet

TPS767D301-Q1, TPS767D318-Q1, TPS767D325-Q1
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS
SGLS231A − FEBRUARY 2004 − JUNE 2008
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
t − Time − μs
LOAD TRANSIENT RESPONSE
I − Output Current − A
O
V
O
− Change inΔ
Output Voltage − mV
1
0.5
604020 80 100 140120 160 180 200
0
V
O
= 3.3 V
C
L
=100 μF
T
A
= 25°C
0
0
50
100
−50
−100
T
A
− Free-Air Temperature − °C
−40 0 20 120
10
3
−60 40 60 80 100
− Dropout Voltage − mV
V
DO
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
10
2
10
1
10
0
10
−1
10
−2
−20 140
I
O
= 1 A
I
O
= 10 mA
I
O
= 0
V
O
= 3.3 V
C
O
= 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 μA at T
J
= 25°C.
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.