Datasheet
TPS77101/115/118/127/128/133/150 WITH RESET OUTPUT
TPS77201/215/218/227/228/233/250 WITH POWER GOOD OUTPUT
150-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS225D – FEBRUARY 2000 – REVISED OCTOBER 2000
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
The device is enabled when the EN pin is connected to a low-level input 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 TPS771xx features an integrated power-on reset, commonly used as a supply voltage supervisor (SVS)
or reset output voltage. The RESET
output of the TPS771xx initiates a reset in DSP, microcomputer or
microprocessor systems at power up and in the event of an undervoltage condition. An internal comparator in
the TPS771xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated
output voltage. When OUT
reaches 95% of its regulated voltage, RESET will go to a high-impedance state after
a 220 ms delay. RESET
will go to low-impedance state when OUT is pulled below 95% (i.e. over load condition)
of its regulated voltage.
For the TPS772xx, the power good terminal (PG) is an active high output, which can be used to implement a
power-on reset or a low-battery indicator. An internal comparator in the TPS772xx monitors the output voltage
of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT
falls below 82%
of its regulated voltage, PG will go to a low-impedance state. PG will go to a high-impedance state when OUT
is above 82% of its regulated voltage.
AVAILABLE OPTIONS
T
OUTPUT VOLTAGE
(V)
PACKAGED DEVICES
MSOP (DGK)
T
J
TYP
TPS771xx
SYMBOL
TPS772xx
SYMBOL
5.0 TPS77150DGK AFV TPS77250DGK AGE
3.3 TPS77133DGK AFU TPS77233DGK AGD
2.8 TPS77128DGK AFS TPS77228DGK AGB
–40
°
Cto125
°
C
2.7 TPS77127DGK AFR TPS77227DGK AGA
–
40
°
C
to
125
°
C
1.8 TPS77118DGK AFP TPS77218DGK AFY
1.5 TPS77115DGK AFO TPS77215DGK AFX
Adjustable
1.5 V to 5.5 V
TPS77101DGK AFN TPS77201DGK AFW
NOTE: The TPS77101 and TPS77201 are programmable using an external resistor divider (see application information).
The DGK package is available taped and reeled. Add an R suffix to the device type (e.g., TPS77101DGKR).
OUT
SENSE
6
5
3
IN
IN
EN
GND
4
7
1
V
I
0.1 µF
10 µF
+
OUT
8
V
O
PG or RESET
PG or
RESET
2
Figure 1. Typical Application Configuration (For Fixed Output Options)