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AP1509 - 2A PWM BUCK DC/DC CONVERTER

General Description

The AP1509 series are monolithic ICs designed for a step-down DC-DC converter and have the ability of driving a 2A load without an additional transistor, which saves board space.

Key Features

  • include a guaranteed +4% tolerance on output voltage under specified input voltage and output load conditions, and +15% on the oscillator frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The chips are available in a standard 8-lead SO-8 package. Features.
  • Output Voltage: 3.3V, 5V, 12V, and Adjustable Output Version.
  • Adjustable Version Output Voltage Range of 1.23V to 18V+4%.
  • 150kHz +15% Fixed Switching Frequency.
  • Voltage Mod.

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The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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AP1509 150kHz, 2A PWM BUCK DC-DC CONVERTER Description The AP1509 series are monolithic ICs designed for a step-down DC-DC converter and have the ability of driving a 2A load without an additional transistor, which saves board space. Pin Assignments (Top View) The external shutdown function can be controlled by logic level and then go into standby mode. The internal compensation makes feedback control have good line and load regulation without external design. Regarding protected function, thermal shutdown prevents overtemperature operating from damage, and current limit works against overcurrent operating of the output switch. If current limit function occurs, and VFB is below 0.5V, the switching frequency is reduced.