TPS770 Datasheet, PDF (1/24 Pages) Texas Instruments – ULTRALOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS

TPS77001, TPS77012, TPS77015, TPS77018, TPS77025
TPS77027, TPS77028, TPS77030, TPS77033, TPS77050
ULTRALOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS
SLVS210D – JUNE 1999 – REVISED MAY 2001
D 50-mA Low-Dropout Regulator
D Available in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V,
2.8-V, 3.0-V, 3.3-V, and 5-V Fixed-Output and
Adjustable Versions
D Only 17 µA Quiescent Current at 50 mA
D 1 µA Quiescent Current in Standby Mode
D Dropout Voltage Typically 35 mV at 50 mA
D Over Current Limitation
D –40°C to 125°C Operating Junction
Temperature Range
D 5-Pin SOT-23 (DBV) Package
description
The TPS770xx family of low-dropout (LDO)
voltage regulators offers the benefits of low
dropout voltage, ultralow-power operation, and
miniaturized packaging. These regulators feature
low dropout voltages and ultralow quiescent
current compared to conventional LDO
regulators. Offered in a 5-terminal small outline
integrated-circuit SOT-23 package, the
TPS770xx series devices are ideal for
micropower operations and where board space is
at a premium.
DBV PACKAGE
(TOP VIEW)
IN
1
5
OUT
GND
2
EN
3
4
NC/FB
TPS77033
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
22
VI = 4.3 V
21 ^{CO = 4.7 µF}
20
19
IO = 50 mA
IO = 0 mA
18
17
A combination of new circuit design and process
16
innovation has enabled the usual PNP pass
transistor to be replaced by a PMOS pass
element. Because the PMOS pass element
15
–60 –40 –20 0 20 40 60 80 100 120 140
behaves as a low-value resistor, the dropout
TA – Free-Air Temperature – °C
voltage is very low — typically 35 mV at 50 mA of
load current (TPS77050) — and is directly proportional to the load current. Since the PMOS pass element is
a voltage-driven device, the quiescent current is ultralow (28 µA maximum) and is stable over the entire range
of output load current (0 mA to 50 mA). Intended for use in portable systems such as laptops and cellular phones,
the ultralow-dropout voltage feature and ultralow-power operation result in a significant increase in system
battery operating life.
The TPS770xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current
to 1 µA typical at T_J = 25°C. The TPS770xx is offered in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V,
and 5-V fixed-voltage versions and in a variable version (programmable over the range of 1.2 V to 5.5 V).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2001, Texas Instruments Incorporated
1