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LDO55 Datasheet

  • LDO55

  • IP Library: Very Low Power, Adjustable Output Voltage, 25m...

  • 2頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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LDO_55
IP Library: Very Low Power, Adjustable Output Voltage虜,
25mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s
ANALOG BASEBAND REGULATOR
s
VERY LOW DROPOUT VOLTAGE : 60mV
s
HIGH PSRR : 60dB
s
LOW QUIESCENT CURRENT
s
20碌A(chǔ) STD-BY MODE CURRENT
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
IN
APPLICATION NOTE
An external capacitor (C
OUT
= 1碌F typical) with an
equivalent serial resistance (ESR) in the range
0.02 to 0.6鈩?is used to ensure stability.
Figure 1 :
Block Diagram
IN
?
? OUT
PWRDWN
STDBY
?
?
V
REF
LDO_55
V
IN
?
?
OUT
V
OUT
C
OUT
Power Down Mode
ON
OFF
Stand-by Mode
Stand-by Mode
鈫?/div>
鈫?/div>
Active Mode
鈫?/div>
鈫?/div>
PWRDWN
1碌F
?
LDO_55
ESR1
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.
1/2

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