SparkFun Buck Regulator Breakout - 5V (AP63357)

The SparkFun 5V Buck Regulator Breakout features the AP63357 from Diodes Inc., a 3.5A synchronous buck converter with a wide input voltage range of 3.8V to 32V. The fully integrated 74mΩ high-side power MOSFET/40mΩ low-side power MOSFET provides a high-efficiency step-down DC/DC conversion. This full-size, 1in. x 1in version of our buck regulator boards is configured to provide a regulated 5V output (from a 6 to 32V input voltage range) and features a high-voltage EN (enable) control pin that is rated up to 32V. On the back of the board, a small copper pad is available to dissipate excess heat with a heat sink. As a full-size buck regulator breakout, additional options for connecting input and output power. There is 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. Our full-size buck regulators also come with a red, power indication LED that light up when the power output is enabled and two mounting holes compatible with 4-40 hardware. Check out our BabyBuck regulators and the SparkFun BabyBuck Regulator Breakout - 5V (AP63357), for the smaller minimalistic versions of our buck regulators. Note: While the AP63357 is rated up to a 3.5A output, users should expect a 3A maximum with our boards due to thermal constraints. The boards can output 3.5A but would require a sufficient amount of active cooling. Get Started with the Sparkfun AP63357 Buck Regulator Guide Features Buck Board:

* 1in. x 1in. PCB layout * Three power input/output options:

* Pre-assembled 4-pin screw terminal * Five 0.1in. spaced PTH pins * Three plated slots for a DC barrel jack (input only)

* Power connections:

* VIN - Power In (6V to 32V) * GND - Common Ground * VOUT - Power Out (Regulated 5V) * EN - Enable (Pull high to enable the power output)

* Red, power LED indicator * 0.5in. x 0.6in. Plated copper pad (for heat sinks) AP63357:

* VIN 3.8V to 32V * 3.5A Continuous Output Current * 0.8V ± 1% Reference Voltage * 22µA Low Quiescent Current (Pulse Frequency Modulation) * 450kHz Switching Frequency * Supports Pulse Frequency Modulation (PFM)

* Up to 86% Efficiency at 5mA Light Load

* Proprietary Gate Driver Design for Best EMI Reduction * Frequency Spread Spectrum (FSS) to Reduce EMI * Low-Dropout (LDO) Mode * Power Good Indicator with 5MΩ Internal Pull-up * Precision Enable Threshold to Adjust UVLO * Protection Circuitry

* Undervoltage Lockout (UVLO) * Output Undervoltage Protection (UVP) * Cycle-by-Cycle Peak Current Limit * Thermal Shutdown

Resources

* Schematic * Eagle Files * Board Dimensions * Hookup Guide * Datasheet (AP63357) * Manufacturer's Product Page (AP63357)

* Technical Documentation * Diodes Technical Support Page

* GitHub Hardware Repo Package Contents

* 1x SparkFun Buck Regulator Breakout - 5V (AP63357)