ULTRA LOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS
SLVS210C – JUNE 1999 – REVISED SEPTEMBER 1999
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50-mA Low-Dropout Regulator
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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
DBV PACKAGE
(TOP VIEW)
1
IN
OUT
5
Adjustable Versions
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Only 17 µA Quiescent Current at 50 mA
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1 µA Quiescent Current in Standby Mode
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Dropout Voltage Typically 35 mV @ 50mA
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Over Current Limitation
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–40°C to 125°C Operating Junction
GND
EN
2
3
4
NC/FB
T emperature Range
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5-Pin SOT-23 (DBV) Package
description
The TPS770xx family of low-dropout (LDO) voltage regulators offers the benefits of low dropout voltage, ultra
low-power operation, and miniaturized packaging. These regulators feature low dropout voltages and ultra low
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.
A combination of new circuit design and process innovation has enabled the usual PNP pass transistor to be
replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the
dropout 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 ultra low
(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 ultra low-dropout
voltage feature and ultra low-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
= 25°C. The
J
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).
22
21
20
19
18
FREE-AIR TEMPERATURE
VI = 4.3 V
CO = 4.7 µF
TPS77033
GROUND CURRENT
vs
IO = 50 mA
IO = 0 mA
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.
Operating virtual junction temperature range, T
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network ground terminal.
Input voltage, VI (see Note 2)2.710V
Output voltage range, V
Continuous output current, IO (see Note 3)050mA
Operating junction temperature, T
NOTES: 2. To calculate the minimum input voltage for your maximum output current, use the following formula:
VI(min) = VO(max) + VDO (max load)
3. Continuous output current and operating junction temperature are limited by internal protection circuitry , but it is not recommended
that the device operate under conditions beyond those specified in this table for extended periods of time.
O
J
1.25.5V
–40125°C
Ĕ
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
TPS77001, TPS77012, TPS77015, TPS77018, TPS77025
TPS77001
TPS77012
TPS77015
TPS77018
TPS77025
(10 µA to 50 mA Load)
(See
)
V
(See Note 4)
TPS77027
TPS77028
TPS77030
TPS77033
TPS77050
()
A
Output voltage line regulation (∆VO/V
Standby current
ULTRA LOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS
SLVS210C – JUNE 1999 – REVISED SEPTEMBER 1999
electrical characteristics over recommended operating free–air temperature range, VI = V
1 V, I
NOTES: 4. Minimum IN operating voltage is 2.7 V or VO (typ) + 1 V , whichever is greater. Maximum IN voltage 10 V, minimum output current
= 50 mA, EN = 0V, C
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PARAMETERTEST CONDITIONS
FB input currentFB = 1.224 V (TPS77001)–11µA
High level enable input voltage2.7 V < VI < 10 V1.7V
Low level enable input voltage2.7 V < VI < 10 V0.9V
Power supply ripple rejection
p
Dropout voltage
(See Note 6)
10 µA, maximum output current 50 mA.
6. IN voltage equals VO(Typ) –100mV; TPS77001 output voltage set to 3.3 V nominal with external resistor divider. TPS77012,
TPS77015, TPS77018, TPS77025, and TPS77027 dropout voltage limited by input voltage range limitations.