LDO59 Datasheet, PDF (1/4 Pages) STMicroelectronics – IP Library: Ultra Low Noise, High PSRR, Low Power, 20mA Low Dropout Voltage Regulator

LDO_59
IP Library: Ultra Low Noise, High PSRR, Low Power,
20mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s RF REGULATOR
s VERY LOW DROPOUT VOLTAGE : 60mV
s ULTRA LOW OUTPUT VOLTAGE NOISE
s HIGH PSRR : 70dB
s LOW QUIESCENT CURRENT : 70µA FULL
LOAD
s NO CURRENT IN POWER DOWN MODE
s SHORT CIRCUIT PROTECTION
s SMALL DECOUPLING CERAMIC CAPACITOR
s MOS INPUT STAGE
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
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 ?
? OUT
PWRDWN ?
V_REF
LDO_59
V_IN
IN
?
OUT
?
V_OUT
Power Down Mode
PWRDWN
?
ON
OFF
LDO_59
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.