AMS1117
1A Adjustable/Fixed Low Dropout Linear Regulator
General Description
The AMS1117 is a low dropout three-terminal regulator
with a dropout of 1.4V at 1A output current. The
AMS1117 series provides current limiting and thermal
shutdown. Its circuit includes a trimmed band-gap
reference to assure output voltage accuracy to be
within 2% for 1.2V, 1.5V,1.8V, 2.5V, 3.3V, 5V and
adjustable versions. Current limit is trimmed to
ensure specified output current and controlled
short-circuit current. On-chip thermal shutdown
provides protection against any combination of
overload and ambient temperature that would create
excessive junction temperature.
The AMS 1117 has an adjustable version that can
provide the output voltage from 1.25V to 5V with
only two external resistors.
The AMS1117 series regulators are available in the indus-
try-standard SOT-223 and TO-252 power packages.
Key Features
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Low dropout voltage
Optimized for Low Voltage
On-chip thermal limiting
Standard SOT-223 and TO-252 packages
Three-terminal adjustable or fixed low dropout
1.2V,1.5V,1.8V, 2.5V, 3.3V, 5V. Regulators
Applications
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High efficiency linear regulators
Telecom equipment
Battery chargers
Motherboard clock supplies
LCD monitor
DVD-video player
Typical Application
AMS1117-ADJ
V
IN
4.7
4.7
V
OUT
AMS1117-Fixed
V
IN
4.7
4.7
V
OUT
Figure 1.
Typical Applications of AMS1117
Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance
1
ETC [ ETC ]
