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LDO57 Datasheet

  • LDO57

  • IP Library: High Output Current, Low power, 400mA Low Dropou...

  • 4頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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LDO_57
IP Library: High Output Current, Low power,
400mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s
DIGITAL BASEBAND REGULATOR
s
VERY LOW DROPOUT VOLTAGE : 50mV
s
HIGH OUTPUT CURRENT : 400mA
s
LOW QUIESCENT CURRENT : 100碌A
s
HIGH PSRR : 60dB
s
LOW OUTPUT VOLTAGE NOISE
s
NO CURRENT IN POWER DOWN MODE
s
SHORT CIRCUIT PROTECTION
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 Baseband devices for cellular
phone.
Figure 2 :
Typical Application Circuit
IN
APPLICATION NOTE
An external capacitor (C
OUT
= 4.7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
IN
?
? OUT
PWRDWN
STDBY
?
?
V
REF
LDO_57
V
IN
?
?
OUT
V
OUT
Power Down Mode
ON
OFF
Stand-by Mode
Stand-by Mode
鈫?/div>
鈫?/div>
Active Mode
鈫?/div>
鈫?/div>
PWRDWN
4.7碌F
?
LDO_57
ESR
C
OUT
STDBY
?
?
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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