Datasheet
SLVS230G − SEPTEMBER 1999 − REVISED JANUARY 2004
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2
description (continued)
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 260 mV at an output
current of 750 mA for the TPS77x33) 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 750 mA). 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 TPS777xx initiates a reset in microcomputer and microprocessor systems in the event of an
undervoltage condition. An internal comparator in the TPS777xx monitors the output voltage of the regulator to detect an
undervoltage condition on the regulated output voltage.
Power good (PG) of the TPS778xx is an active high output, which can be used to implement a power-on reset or a
low-battery indicator.
The TPS777xx and TPS778xx are 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 1.5 V to 5.5 V for the TPS77701 option and 1.2 V to 5.5 V for the TPS77801 option).
Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. The TPS777xx and
TPS778xx families are available in 8-pin SOIC and 20-pin PWP packages.
AVAILABLE OPTIONS
T
J
OUTPUT
VOLTAGE
(V)
PACKAGED DEVICES
T
J
TYP
TSSOP
(PWP)
SOIC
(D)
3.3 TPS77733PWP TPS77833PWP TPS77733D TPS77833D
2.5 TPS77725PWP TPS77825PWP TPS77725D TPS77825D
1.8 TPS77718PWP TPS77818PWP TPS77718D TPS77818D
−40
°
C to 125
°
C
1.5 TPS77715PWP TPS77815PWP TPS77715D TPS77815D
−40°C to 125°C
Adjustable
1.5 V to 5.5 V
TPS77701PWP — TPS77701D —
Adjustable
1.2 V to 5.5 V
— TPS77801PWP — TPS77801D
The TPS77x01 is programmable using an external resistor divider (see application information). The D and PWP
packages are available taped and reeled. Add an R suffix to the device type (e.g., TPS77701DR).
(1)
See application information section for capacitor selection details.
RESET/
PG
OUT
OUT
7
6
5
IN
IN
EN
GND
3
16
14
13
V
I
0.1 µF
RESET
/PG
V
O
10 µF
+
C
o
(1)
Figure 1. Typical Application Configuration for Fixed Output Options