參數(shù)資料
型號： LDO57
廠商： 意法半導(dǎo)體
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： IP Library: High Output Current, Low power, 400mA Low Dropout Voltage Regulator
中文描述： IP庫：高輸出電流，低功耗，400mA的低壓差穩(wěn)壓器
文件頁數(shù)： 1/4頁
文件大?。?/td> 110K
代理商： LDO57
1/4
June 2002
IP Library: High Output Current, Low power,
400mA Low Dropout Voltage Regulator
I
DIGITAL BASEBAND REGULATOR
I
VERY LOW DROPOUT VOLTAGE : 50mV
I
HIGH OUTPUT CURRENT : 400mA
LOW QUIESCENT CURRENT : 100
μ
A
HIGH PSRR : 60dB
I
I
I
LOW OUTPUT VOLTAGE NOISE
I
NO CURRENT IN POWER DOWN MODE
I
SHORT CIRCUIT PROTECTION
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 Digital Baseband devices for cellular
phone.
APPLICATION NOTE
An external capacitor (C
OUT
= 4.7
μ
F) with an
equivalent serial resistance (ESR) in the range
0.02 to 0.6
is used for regulator stability.
Figure 1 :
Block Diagram
V
REF
LDO_57
OUT
IN
PWRDWN
STDBY
Figure 2 :
Typical Application Circuit
4.7
μ
F
ESR
V
OUT
C
OUT
OUT
GND
V
IN
IN
PWRDWN
Power Down Mode
ON
OFF
Stand-by Mode
Active Mode
STDBY
LDO_57
→
→
Stand-by Mode
→
→
LDO_57
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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