18v 3a 300khz Buck Converter

AP1538 consists of Step-down Switching Regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error Amplifier internal PMOS. AP1538 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 0 up to 99%. This converter also contains an error Amplifier circuit as well as a soft-start circuit that prevents overshoot at startup. An enable function, an over current protect function and a short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced from 300KHz to 50KHz. Also, an internal compensation block is built in to minimum external component 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 and SOP-8L-DEP mini-packages, 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. By Diodes, Inc.
AP1538 's PackagesAP1538 's pdf datasheet
AP1538SG-U SOP
AP1538SG-13 SOP
AP1538SDPG-U SOP
AP1538SDPG-13 SOP




AP1538 Pinout, Pinouts
AP1538 pinout,Pin out
This is one package pinout of AP1538,If you need more pinouts please download AP1538's pdf datasheet.

AP1538 Application circuits
AP1538 circuits
This is one application circuit of AP1538,If you need more circuits,please download AP1538's pdf datasheet.


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