LDO-512 Datasheet, PDF (1/5 Pages) STMicroelectronics – Ultra Low Noise, High PSRR, Low Power, 30mA Very Low Dropout Voltage Regulators

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 (C_OUT = 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 ?
V_REF
? OUT
LDO_512
V_IN
IN
?
OUT
?
V_OUT
Power Down Mode
ON
→
OFF
→
Stand-by Mode
Stand-by Mode →
Active Mode →
PWRDWN
?
LDO_512
STDBY
?
GND
?
1µF
C_OUT
ESR
June 2002
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This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.