LDO512 查看數據表（PDF） - STMicroelectronics
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LDO512
STMicroelectronics
LDO512 Datasheet PDF : 5 Pages
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LDO_512
IP Library: Ultra Low Noise, High PSRR, Low Power,
30mA Very Low Dropout Voltage Regulators
s RF REGULATOR
s VERY LOW DROPOUT VOLTAGE : 30mV
s ULTRA LOW OUTPUT VOLTAGE NOISE
s HIGH PSRR : 70dB
s LOW STAND-BY CURRENT : 20µA
s LOW QUIESCENT CURRENT : 150µA FULL
LOAD
s NO CURRENT IN POWER DOWN MODE
s SHORT CIRCUIT PROTECTION
s SMALL DECOUPLING CERAMIC CAPACITOR
s BIPOLAR INPUT STAGE
TYPICAL APPLICATIONS
– Cellular and Cordless phones supplied by 1 cell
Lithium-ion battery / 3 cells Ni-MH or Ni-Cd
battery
– PDA (Personal Digital Assistant)
– Smart phone
– Portable equipment
– Supply for RF devices for cellular phone
Figure 2 : Typical Application Circuit
PRODUCT PREVIEW
APPLICATION NOTE
An external capacitor (COUT = 1µF) with an
equivalent serial resistance (ESR) in the range
0.02 to 0.6Ω is used for regulator stability.
Figure 1 : Block Diagram
IN ?
PWRDWN ?
STDBY ?
VREF
? OUT
LDO_512
VIN
IN
?
OUT
?
VOUT
Power Down Mode
ON
→
OFF
→
Stand-by Mode
Stand-by Mode →
Active Mode →
PWRDWN
?
LDO_512
STDBY
?
GND
?
1µF
COUT
ESR
June 2002
1/6
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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