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LDO518 Datasheet

  • LDO518

  • IP Library: Low Noise, High PSRR 100mA Low Dropout Voltage R...

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  • STMICROELECTRONICS   STMICROELECTRONICS

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LDO_518
IP Library: Low Noise, High PSRR
100mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s
ULTRA LOW POWER REGULATOR
s
ULTRA LOW CONSUMPTION : 45碌A(chǔ) FULL
LOAD
s
s
s
s
s
s
VERY LOW NOISE : 30碌V
VERY LOW DROPOUT VOLTAGE : 50mV
HIGH PSRR : 60dB
SMALL DECOUPLING CERAMIC CAPACITOR
NO CURRENT IN POWER DOWN MODE
SHORT CIRCUIT PROTECTION
APPLICATION NOTE
An external capacitor (C
OUT
= 2.2碌F) with an
equivalent serial resistance (ESR) in the range of
0.02 to 0.6鈩?is used for regulator stability.
Figure 1 :
Block Diagram
IN
?
? OUT
PWRDWN
STDBY
?
?
V
REF
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)
鈥?Smart phone
鈥?Portable equipment
鈥?Supply for RF devices for cellular phone
Figure 2 :
Typical Application Circuit
IN
LDO_518
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
2.2碌F
?
LDO_518
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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