SparkFun
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 3...
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.
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
Documents:
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- PTH
- Plated through-hole means the pin holes are metal-lined so solder connects the pad on both sides of the board. It is useful for connectors and headers that need a strong mechanical and electrical connection.
Find this product in
Power & Batteries
SparkFun Buck Regulator 5V Schematic
Schematic · 99.4 KB · Click any page to view full size
AP63357 Datasheet
Datasheet · 1.6 MB · Click any page to view full size
SparkFun Buck Regulator 5V Board Dimensions
Mechanical Drawings · 217.3 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 674.5 KB · Click any page to view full size
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