LDO52 Datasheet, PDF (1/4 Pages) STMicroelectronics – IP Library: High PSRR, Low Power, 70mA Low Dropout Voltage Regulator

LDO_52
IP Library: High PSRR, Low Power,
70mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s DIGITAL BASEBAND REGULATOR
s VERY LOW DROPOUT VOLTAGE : 50mV
s HIGH PSRR : 60dB
s LOW QUIESCENT CURRENT : 150µA
s 1µA STAND-BY MODE CURRENT
s NO CURRENT IN POWER DOWN MODE
s SHORT CIRCUIT PROTECTION
s SMALL DECOUPLING CERAMIC CAPACITOR
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 Digital (Memory, DSP/Microcontroller)
devices.
Figure 2 : Typical Application Circuit
APPLICATION NOTE
An external capacitor (C_OUT = 1µF typical) with an
equivalent serial resistance (ESR) in the range
0.02 to 0.6Ω is used to ensure stability.
Figure 1 : Block Diagram
IN ?
PWRDWN ?
STDBY ?
V_REF
? OUT
LDO_52
V_IN
IN
?
OUT
?
V_OUT
Power Down Mode
ON
→
OFF
→
Stand-by Mode
Stand-by Mode →
Active Mode →
PWRDWN
?
STDBY
?
LDO_52
GND
?
1µF
C_OUT
ESR
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.