LDO51 Datasheet, PDF (1/4 Pages) STMicroelectronics – IP Library: High PSRR, Low power, 80mA Low Dropout Voltage Regulator

LDO_51
IP Library: High PSRR, Low power,
80mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s ANALOG BASEBAND REGULATOR
s VERY LOW DROPOUT VOLTAGE : 50mV
s HIGH PSRR : 60dB
s LOW QUIESCENT CURRENT : 130µA
s LOW OUTPUT VOLTAGE NOISE
s NO CURRENT IN POWER DOWN MODE
s SHORT CIRCUIT PROTECTION
s SMALL DECOUPLING CERAMIC CAPACITOR
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 Analog and Mixed-signal devices for
cellular phone.
Figure 2 : Typical Application Circuit
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 ?
? OUT
PWRDWN ?
V_REF
LDO_51
V_IN
IN
?
OUT
?
V_OUT
Power Down Mode
PWRDWN
?
ON
OFF
LDO_51
1µF
C_OUT
ESR
GND
?
June 2002
1/4
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.