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LDO-512 Datasheet

  • LDO-512

  • STMicroelectronics [Ultra Low Noise, High PSRR, Low Power, ...

  • STMICROELECTRONICS   STMICROELECTRONICS

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LDO_512
IP Library: Ultra Low Noise, High PSRR, Low Power,
30mA Very Low Dropout Voltage Regulators
PRODUCT PREVIEW
s
s
s
s
s
s
s
s
s
s
RF REGULATOR
VERY LOW DROPOUT VOLTAGE : 30mV
ULTRA LOW OUTPUT VOLTAGE NOISE
HIGH PSRR : 70dB
LOW STAND-BY CURRENT : 20碌A(chǔ)
LOW QUIESCENT CURRENT : 150碌A(chǔ) FULL
LOAD
NO CURRENT IN POWER DOWN MODE
SHORT CIRCUIT PROTECTION
SMALL DECOUPLING CERAMIC CAPACITOR
BIPOLAR INPUT STAGE
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
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_512
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
1碌F
?
LDO_512
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.
1/6

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