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LDO_53

IP Library: High PSRR, Very Low Power, 40mA Low Dropout Voltage Regulator

STMicroelectronics 

LDO_53

IP Library: High PSRR, Very Low Power,

40mA Low Dropout Voltage Regulator

PRODUCT PREVIEW

s DIGITAL BASEBAND REGULATOR

s VERY LOW DROPOUT VOLTAGE : 50mV

s HIGH PSRR : 55dB

s VERY LOW QUIESCENT CURRENT : 100µA

FULL LOAD

s NO CURRENT IN POWER DOWN MODE

s SHORT CIRCUIT PROTECTION

s SMALL DECOUPLING CERAMIC CAPACITOR

TYPICAL APPLICATIONS

– Cellular and Cordless phones supplied by 1 cell

Lithium-ion battery / 3 cells Ni-MH or Ni-Cd

battery.

– PDA (Personal Digital Assistant), Smart phone.

– Portable equipment

– Supply for Digital (DSP/Microcontroller) devices.

Figure 2 : Typical Application Circuit

APPLICATION NOTE

An external capacitor (COUT = 1µF) with an

equivalent serial resistance (ESR) in the range

0.02 to 0.6Ω is used for regulator stability.

Figure 1 : Block Diagram

IN ?

? OUT

PWRDWN ?

VREF

LDO_53

VIN

IN

?

OUT

?

VOUT

Power Down Mode

PWRDWN

?

ON

OFF

LDO_53

1µF

COUT

ESR

GND

?

June 2002

1/4

This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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