SparkFun Buck Regulator Breakout – 1.8V (AP3429A)

Description

• SparkFun Buck Regulator Breakout – 1.8V (AP3429A)
• Incorporates a 2A step-down DC converter
• Operates within a 2.7V to 5.5V input voltage range
• Features a heat management copper pad
• Offers multiple power connection options
• Equipped with a red power indication LED

The SparkFun Buck Regulator Breakout – 1.8V (AP3429A) is a sophisticated device that incorporates the AP3429A from Diodes Inc., a 2 A step-down DC converter. This converter operates within an input voltage range of 2.7 V to 5.5 V. The device, measuring 1 inch by 1 inch, is designed to deliver a regulated 1.8 V output, which is managed by an EN (enable) pin.

To manage excess heat, the device is equipped with a 0.6 inch by 0.5 inch copper pad, which allows for the attachment of a heat sink to the bottom of the board.

This full-size buck regulator breakout offers multiple options for connecting input and output power. It includes a pre-assembled screw terminal for temporary connections, the possibility to solder on a barrel jack for an external power supply, and five PTH pins for a more permanent installation.

The device also features a red power indication LED that illuminates when the power output is enabled. The board is designed with four mounting holes that are compatible with 4-40 hardware.

View moreWhat’s Included

• 1x SparkFun Buck Regulator Breakout – 1.8V (AP3429A)

Dimensions

• 1 x 1 inch

Links

PDF File

• SparkFun Buck Regulator Breakout – 1.8V (AP3429A) – Schematics

Website

• SparkFun Buck Regulator Breakout – 1.8V (AP3429A) – Hookup Guide

Specifications

Buck Board

• Three power input/output options:
  • Pre-assembled 4-pin screw terminal
  • Five 0.1 inch spaced PTH pins
  • Four plated slots for a DC barrel jack (input only)
• Power connections:
  • VIN – Power In (2.7 V to 5.5 V)
  • GND – Common Ground
  • VOUT – Power Out (Regulated 1.8 V)
  • EN – Enable (Pull high to enable the power output)
• Red, power LED indicator
• 0.5 x 0.6 inch Plated copper pad (for heat sinks)

AP3429A

• VIN: 2.7 to 5.5 V
• VOUT: 0.6 V to VIN
• 2 A Continuous Output Current
• 90 A No-Load Quiescent Current
• 1 MHz Switching Frequency
• Protection Circuitry
• Undervoltage Lockout (UVLO)
• Input Overvoltage Protection
• Over Current Protection
• Cycle-by-Cycle Peak Current Limit
• Thermal Shutdown (160 C / 320 F)