SparkFun Buck Regulator Breakout – 3.3V (AP3429A)

Description

• SparkFun Buck Regulator Breakout – 3.3V (AP3429A)
• Features a 2A step-down DC converter
• Provides a regulated 3.3V output from a 3.9V to 5.5V input
• Includes a copper pad for efficient heat management
• Offers multiple power input/output options for flexibility

The SparkFun Buck Regulator Breakout – 3.3V (AP3429A) is a sophisticated device that features the AP3429A from Diodes Inc. This device is a 2 A step-down DC converter with an input voltage range of 2.7 V to 5.5 V.

The full-size version of the buck regulator boards, measuring 1 inch by 1 inch, is designed to provide a regulated 3.3 V output. This output is derived from an input voltage range of 3.9 V to 5.5 V and is controlled by an EN (enable) pin.

To manage excess heat, the device is equipped with a 0.6-inch by 0.5-inch copper pad. This pad is designed to facilitate the attachment of a heat sink to the bottom of the board.

As a full-size buck regulator breakout, this device offers additional options for connecting input and output power. It includes a pre-assembled screw terminal for a non-permanent connection, the option to solder on a barrel jack for an external power supply, and five PTH pins to create a more permanent installation.

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

View moreWhat’s Included

• 1x SparkFun Buck Regulator Breakout – 3.3V (AP3429A)

Dimensions

• 1 x 1 inch (L x W)

Links

PDF File

• SparkFun Buck Regulator Breakout – 3.3V (AP3429A) – Schematics

Website

• SparkFun Buck Regulator Breakout – 3.3V (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 (3.9 V to 5.5 V)
  • GND – Common Ground
  • VOUT – Power Out (Regulated 3.3 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 V to 5.5 V
• VOUT: 0.6 V to VIN
• 2 A Continuous Output Current
• 90A 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)