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參數資料
| 型號： | AME8753AEZA2533Z |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low Dropout 500mA / 500mA Dual CMOS LDO Regulator |
| 中文描述： | 低壓差500mA電流/ 500mA的雙通道CMOS LDO穩壓器 |
| 文件頁數： | 6/11頁 |
| 文件大小： | 224K |
| 代理商： | AME8753AEZA2533Z |
AME, Inc.
6
Low Dropout
500mA / 500mA Dual CMOS LDO Regulator
AME8753
Rev.A.02
n
Detailed Description
The AME8753 is low-dropout, low quiescent-current lin-
ear regulator designed primarily for battery-powered appli-
cations. These parts are available with preset output volt-
age ranging from 2.5V to 3.3V, and the parts can supply
loads up to 500mA.
The AME8753 features two 1
P-Channel MOSFET pass
transistors. A P-Channel MOSEFT provides several advan-
tages over similar designs using PNP pass transistors, in-
cluding longer battery life. It requires no base drive, which
reduces quiescent current significantly. The AME8753 only
consume 70
μ
A of quiescent current whether in dropout, light-
load, or heavy-load applications.
The AME8753 contains two independent current limit-
ers, one for each regulator, which monitor and control the
pass transistor
’
s gate voltage, limiting output current to
700mA minimum. The output can be shorted to ground for
an indefinite time without damaging the part.
Use a 1
μ
F capacitor on the AME8753 input and a
1
μ
F capacitor on the outputs. Larger input capacitor
values and lower ESRs provide better supply noise re-
jection and line transient response.
Thermal -overload protection limits total power dissipa-
tion in the AME8753. When the junction trmperature ex-
ceeds T
=150
o
C, the themal sensor signals the shutdown
logic, turning off the pass transistor and allowing the IC to
cool.
Internal P-Channel Pass Transistor
Current Limit
Thermal-Overload Protection
n
Application Information
Capacitor Selection and Regulator Stability
PSRR and Operation from Sources Other
than Batteries
The AME8753 is designed to deliver low dopout volt-
ages and low quiescent currents in battery powered
systems. Power-supply rejection is 50dB at low fre-
quencies.
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