Diodes Menu Close
Back to Buck Converter


150kHz, 3A PWM Buck DC/DC Converter

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AP1501 is a fully integrated step-down DC/DC converter, with the ability to drive 3A load without the need of additional driver components. The AP1501 operates at a switching frequency of 150kHz enabling the use of small size filter components. As a result, board space is reduced and BOM costs are lowered.

The AP1501 has integrated the shutdown function that allows standby mode to be activated via an external logic signal input. The internal compensation facilitates feedback control for line and load regulation without the need of an external circuitry. The AP1501 has a built-in Thermal shutdown and Current Limit function to prevent damage from high operating temperature and high current operating to the output switch.

Additional features include a guaranteed +/- 4% tolerance on the output voltage under specified input and output load conditions, and +/- 15% on oscillator frequency. The AP1501 offers both fixed and a Adjustable output voltages. For fixed outputs the AP1501 supports 3.3V, 5.0V and 12V. The package options available are standard 5- lead TO263 and TO220(R) packages.


  • Output Voltage: 3.3V, 5V, 12V and Adjustable Output Version
  • Adjustable Version Output Voltage Range, 1.23V to 37V+4%
  • 150kHz +15% Fixed Switching Frequency
  • Voltage Mode Non-Synchronous PWM Control
  • Thermal-Shutdown and Current-Limit Protection
  • ON/OFF Shutdown Control Input
  • Operating Voltage can be up to 40V
  • Output Load Current: 3A
  • Low Power Standby Mode
  • Built-In Switching Transistor on Chip
  • TO263-5 and TO220-5(R) Packages
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen- and Antimony-Free. “Green” Device (Note 3)


  • Simple High-efficiency step-down regulator
  • On-card switching regulators
  • Positive to negative converter

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Type Buck
Minimum Input Voltage (V) 4.5
Maximum Input Voltage (V) 40
Output Current (A) 3
Minimum Output Voltage (V) 1.23
Maximum Output Voltage (V) 37
Quiescent Current Typ (µA) 5000
Shutdown Current Typ (µA) 150
Frequency Typ (kHz) 150

Related Content


Technical Documents

Application Notes

Recommended Soldering Techniques