Datasheet
SLVS293D − NOVEMBER 2000 − REVISED MAY 2002
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 250 mV
at an output current of 5 A for the TPS75533) 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 125 µA over the full range of output current). These two key specifications yield a significant
improvement in operating life for battery-powered systems.
The device is enabled when EN
is connected to a low-level voltage. 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 power-good terminal (PG) is an active low, open drain output, which can be used to
implement a power-on reset or a low-battery indicator.
The TPS755xx is offered in 1.5-V, 1.8-V, 2.5-V, and 3.3-V fixed-voltage versions and in an adjustable version
(programmable over the range of 1.22 V to 5 V). Output voltage tolerance is specified as a maximum of 3% over
line, load, and temperature ranges. The TPS755xx family is available in a 5-pin TO−220 (KC) and TO−263 (KTT)
packages.
AVAILABLE OPTIONS
T
J
OUTPUT VOLTAGE
(TYP)
TO−220 (KC) TO−263(KTT)
3.3 V TPS75533KC TPS75533KTT
2.5 V TPS75525KC TPS75525KTT
−40°C to 125°C
1.8 V TPS75518KC TPS75518KTT
−40 C to 125 C
1.5 V TPS75515KC TPS75515KTT
Adjustable 1.22 V to 5 V TPS75501KC TPS75501KTT
NOTE: The TPS75501 is programmable using an external resistor divider (see application
information). The KTT package is available taped and reeled. Add an R suffix to the
device type (e.g., TPS75501KTTR) to indicate tape and reel.
†
See application information section for capacitor selection details.
PG
OUT
2
1
IN
EN
GND
3
5
4
V
I
1 µF
PG
V
O
47 µF
+
C
o
†
Figure 1. Typical Application Configuration (For Fixed Output Options)