AME, Inc.
AME5110
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General Description
The AME5110 family of Fixed Frequency,High Efficiency,
Synchronous Buck, DC-DC Converters, apply the latest
innovations in Current-Mode Technology. Available in SOT-
25 package, these devices are typically twice as efficient
as standard LDO’ s, making them well suited for most
portable applications.
The AME5110 is simple to use. As with standard
LDO’ s,(1) Input, and (1) Output capacitor are required.
The only other element is a small, low cost, 2.2µH induc-
tor. The AME5110 is availabe with fixed output voltages
of 1.5V and 1.8V, or adjustable at 600mA. Using a propri-
etary
“
Extreme Green” Technology, battery life is maxi-
mized with Frequency Foldback at light Load, and 100%
duty when Vin approaches Vout.
600mA / 1.2MHz PWM
Buck DC-DC Converter
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Typical Application
Fixed Voltage Version
V
IN
2.2µH
V
IN
SW
V
OUT
C
IN
4.7µF
CER
AME5110
EN
GND
V
OUT
C
OUT
10µF
CER
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Features
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High Efficiency
“
Extreme Green”
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2.5V to 5.5V Input
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Short Circuit Protection
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Over-Temperature Shutdown
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Under-Volatge Lockout
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Superb Transient Response
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All AME’ s Lead Free Products Meet RoHS
Standards
C
IN
4.7µF
CER
V
IN
V
IN
SW
22pF
2.2µH
V
OUT
Adjustable Voltage Version
AME5110
EN
GND
V
FB
R1
C
OUT
10µF
CER
R2
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Applications
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Cellular Phones
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Digital Cameras
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Portable Electronics
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USB Devices
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MP3 Players
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LDO Replacement
V
OUT
=V
FB
(R1+R2)/R2
Rev. A.03
1
AME [ ANALOG MICROELECTRONICS ]
