AME
AME8818
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General Description
The AME8818 is a CMOS linear regulator. It operated from
2.5V to 5.5V input voltage and delivers up to 300mA output
current. The AME8818 provide low quiescent current (70µA
typ) low dropout voltage (230mV @ 300mA typ), and excel-
lent PSRR, thus marking them ideal for Data-Communica-
tions and battery applications.
The AME8818 provide over temperature and over current
protected functions. It is stable with an output capacitance of
1µF or larger.
Low Dropout
300mA CMOS Regulator
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Functional Block Diagram
(Fixed Version)
IN
OUT
Overcurrent
Shutdown
A
Thermal
Shutdown
EN
R1
BYP/NC
Bandgap
Reference
R2
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Features
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Input voltage range is from 2.5V to 5.5V
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Output Voltage Range:
Fixed Version is from 1.2V to 4.5V
ADJ Version is from 0.98V to 4.5V
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Low Dropout: 230mV @ 300mA
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Guaranteed 300mA Drive Current
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Factory Pre-set output voltage
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Only 1µF Output Capacitor Required for
Stability
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Provided OTP, current limit
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Green Products Meet RoHS Standards
Bandgap
Reference
ADJ
R2
(external )
EN
GND
(Adjustable Version)
IN
OUT
Overcurrent
Shutdown
Thermal
Shutdown
R1
(external )
GND
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Applications
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l
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Data-Communication
Laptop, Palmtops, Notebook computers
Battery Power Equipment
Handheld Device
PCMCIA Cards
Rev.D.06
1
AME
AME8818
n
Pin Configuration (Contd.)
SC-70-4 (SC-82)
Top View
4
3
Low Dropout
300mA CMOS Regulator
AME8818AEIU
1. EN
2. GND
3. OUT
4. IN
5
SC-70-5
Top View
4
AME8818AEIV
1. IN
2. GND
3. EN
4. NC
5. OUT
AME8818
AME8818
1
2
1
2
3
Die Attach:
Conductive Epoxy
Die Attach:
Conductive Epoxy
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Pin Description
Pin Name
IN
GND
OUT
Pin Description
Input voltage pin.
It should be decoupled with 1µF or greater capacitor.
Ground connection pin.
LDO voltage regulator output pin.
It should be decoupled with a 1µF or greater value low ESR ceramic capacitor.
The Enable pin normally floats high.
When pulled low, the PMOS pass transistors shut off, and all internal circuit are powered
down.
No Internal Connection
Bypass capacitor connection.
In AME8818BEEV and AME8818CEEV, IC will select internal circuit to improve ESR.
In AME8818AEEV, IC will select external circuit to improve ESR and AC ripple rejection.
Feedback output voltage for adjustable device.
EN
NC
BYP
ADJ
4
Rev.D.06
嵌入式系统
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