AME, Inc.
AME5107
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General Description
AME5107provides low-ripple power, high efficiency, and
excellent transient characteristics. The PWM control cir-
cuit is able to vary the duty ratio linearly from 0 up to
100%. This converter also contains an error amplifier cir-
cuit as well as a soft-start circuit that prevents overshoot
at startup. An enable function, an over current protect func-
tion and a short circuit protect function are built inside,
and when OCP or SCP happens, the operation frequency
will be reduced from 350KHz to 30KHz. Also, an internal
compensation block is built in to minimum external com-
ponent count.
With the addition of an internal P-channel Power MOS,
a coil, capacitors, and a diode connected externally, these
ICs can function as step-down switching regulators. They
serve as ideal power supply units for portable devices when
coupled with the SOP-8L mini-package, providing such
outstanding features as low current consumption. Since
this converter can accommodate an input voltage up to
18V, it is also suitable for the operation via an AC adapter.
PWM Control 3A Buck
Converter
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Applications
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PC Motherboard
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LCD Monitor
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Graphic Card
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DVD-Video Player
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Telecom Equipment
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ADSL Modem
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Printer and other Peripheral Equipment
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Microprocessor core supply
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Networking power supply
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Features
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Input voltage: 3.6V to 18V.
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Output voltage: 0.8V to VCC.
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Duty ratio: 0% to 100% PWM control
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Oscillation frequency: 350KHz typ.
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Soft-start, Current limit, Enable function
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Thermal Shutdown function
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Built-in internal SW P-channel MOS
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SOP-8 Package
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All AME’ s Lead Free Products Meet RoHS
Standards
S
C
Rev.A.01
1
AME [ ANALOG MICROELECTRONICS ]
