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LDO53 Datasheet

  • LDO53

  • IP Library: High PSRR, Very Low Power, 40mA Low Dropout Volt...

  • 4頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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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 : 100碌A(chǔ)
FULL LOAD
APPLICATION NOTE
An external capacitor (C
OUT
= 1碌F) with an
equivalent serial resistance (ESR) in the range
0.02 to 0.6鈩?is used for regulator stability.
Figure 1 :
Block Diagram
s
NO CURRENT IN POWER DOWN MODE
s
SHORT CIRCUIT PROTECTION
s
SMALL DECOUPLING CERAMIC CAPACITOR
TYPICAL APPLICATIONS
鈥?Cellular and Cordless phones supplied by 1 cell
Lithium-ion battery / 3 cells Ni-MH or Ni-Cd
battery.
鈥?PDA (Personal Digital Assistant), Smart phone.
鈥?Portable equipment
鈥?Supply for Digital (DSP/Microcontroller) devices.
Figure 2 :
Typical Application Circuit
V
IN
IN
IN
?
? OUT
PWRDWN
?
V
REF
LDO_53
?
?
OUT
V
OUT
Power Down Mode
PWRDWN
ON
1碌F
?
LDO_53
ESR
C
OUT
OFF
?
GND
June 2002
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/4

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