Analog Microelectronics, Inc.
AME1117
1A Low Dropout Positive
Voltage Regulator
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General Descriptions
The AME1117 is a 1A low-dropout positive voltage regu-
lator. It is available in fixed and adjustable output
voltage versions. Overcurrent and thermal protection
are integrated onto the chip. Output current will limit
as while it reaches the pre-set current or temperature
limit. The dropout voltage is specified at 1.4V Maxi-
mum at full rated output current. The AME1117 series
provides excellent regulation over line, load and tem-
perature variations.
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Key Features
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Low dropout voltage ..............1.2V at 1A
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Adjustable or fixed voltages 2.5V, 3.3V, 5.0V
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Typical line regulation ....... 0.2%
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Typical load regulation ...... 0.15%
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Adjust pin current less than 90µA
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Overcurrent protection
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Thermal protection
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Available in TO-220, TO-252, SOT-223
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Applications
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High Efficiency Linear Regulators
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5V to 3.3V Voltage Converter
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Battery Charger
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Post Regulators for Switching Supplies
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Functional Block Diagram
In p u t
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Typical Application
AM E1117
C u rre n t
L im itin g
A m p lifie r
GND
4.75V to 12V
10µF Tan
10µF Tan
Load
T h e rm a l
P ro te ctio n
O u tp u t
E rro r
Am p.
Bandgap
R e fe re n c e
A D J/C O M
Input range depends on V
OUT
Please refer to electrical characteristics.
Figure 1
Figure 2
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AME [ ANALOG MICROELECTRONICS ]
