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LDO51 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. LDO51
Description  IP Library: High PSRR, Low power, 80mA Low Dropout Voltage Regulator
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LDO51 Datasheet(HTML) 1 Page - STMicroelectronics

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June 2002
IP Library: High PSRR, Low power,
80mA Low Dropout Voltage Regulator
s ANALOG BASEBAND REGULATOR
s VERY LOW DROPOUT VOLTAGE : 50mV
s HIGH PSRR : 60dB
s LOW QUIESCENT CURRENT : 130
µA
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.
APPLICATION NOTE
An external capacitor (COUT = 1µF) with an
equivalent serial resistance (ESR) in the range
0.02 to 0.6
Ω is used for regulator stability.
Figure 1 : Block Diagram
?
VREF
?
?
LDO_51
OUT
IN
PWRDWN
Figure 2 : Typical Application Circuit
1
µF
ESR
VOUT
COUT
?
?
OUT
GND
?
?
VIN
IN
Power Down Mode
OFF
ON
LDO_51
PWRDWN
LDO_51
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
PRODUCT PREVIEW


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