SparkFun Buck Regulator Breakout - 5V (AP63357)

The SparkFun 5V Buck Regulator Breakout is a powerful tool that boasts an AP63357 from Diodes Inc., a 3.5A synchronous buck converter with an expansive input voltage range of 3.8V to 32V. This versatile piece of equipment also features a fully integrated 74mΩ high-side power MOSFET/40mΩ low-side power MOSFET, providing a high-efficiency step-down DC/DC conversion.The SparkFun Buck Regulator Breakout is configured to provide a regulated 5V output from a 6 to 32V input voltage range. This makes it an ideal choice for various applications where a steady and reliable power source is required. It also features a high-voltage EN (enable) control pin that is rated up to 32V. To help manage heat, a small copper pad is located on the back of the board where a heat sink can be attached if needed.This full-size buck regulator breakout offers several options for connecting input and output power. It includes a pre-assembled screw terminal for non-permanent connections, the option to solder on a barrel jack for an external power supply, and five PTH pins for a more permanent installation. The breakout also comes with a red power indication LED that lights up when the power output is enabled, and two mounting holes compatible with 4-40 hardware.The AP63357 is rated up to a 3.5A output, however, users should expect a maximum of 3A due to thermal constraints. The boards can output 3.5A but would require a sufficient amount of active cooling. For smaller, minimalistic versions of buck regulators, consider the SparkFun BabyBuck regulators.The SparkFun 5V Buck Regulator Breakout comes with a variety of features including:

* 2.54cm x 2.54cm PCB layout * Three power input/output options:

* Pre-assembled 4-pin screw terminal * Five 2.54mm 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 * 1.27cm x 1.52cm Plated copper pad (for heat sinks) The AP63357 features include:

* 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