SparkFun
SparkFun BabyBuck Regulator Breakout - 5V (AP63357)
The SparkFun BabyBuck Regulator Breakout delivers a regulated 5V output from a 6–32V input in an ultra-compact 0.63" × 0.52" form factor. Based on the AP6335...
The SparkFun BabyBuck Regulator Breakout delivers a regulated 5V output from a 6–32V input in an ultra-compact 0.63" × 0.52" form factor. Based on the AP63357 synchronous buck converter from Diodes Inc., it provides up to 3.5A continuous output with high efficiency, integrated MOSFETs, and comprehensive protection circuitry.
With just four PTH pins (VIN, GND, VOUT, EN), the board is easy to integrate into any project. The enable pin supports up to 32V for direct battery-level control, and a copper pad on the back accommodates a heat sink for sustained high-current operation.
Key Features
- Regulated 5V Output – From 6V to 32V input range
- Up to 3.5A Output – 3A recommended without active cooling
- Ultra-Compact – 0.63" × 0.52" PCB with 0.1" spaced PTH pins
- High Efficiency – Up to 86% at 5 mA light load (PFM mode)
- 22 µA Quiescent Current – Excellent for battery-powered applications
- Enable Pin – High-voltage EN rated up to 32V with precision UVLO threshold
- Heat Sink Pad – 0.5" × 0.6" plated copper pad on the back
- 450 kHz Switching Frequency – With frequency spread spectrum for EMI reduction
Pin Configuration
- VIN – Power input (6V to 32V)
- GND – Common ground
- VOUT – Regulated 5V output
- EN – Enable (pull high to enable output)
Protection
- Undervoltage lockout (UVLO)
- Output undervoltage protection (UVP)
- Cycle-by-cycle peak current limit
- Thermal shutdown
Ideal For
- Battery-powered projects needing regulated 5V
- Automotive and solar panel voltage regulation
- Compact embedded systems
- Raspberry Pi and microcontroller power supplies
Resources
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.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- 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
BabyBuck 5V Schematic
Schematic · 103.1 KB · Click any page to view full size
AP63357 Datasheet
Datasheet · 1.6 MB · Click any page to view full size
BabyBuck 5V Board Dimensions
Mechanical Drawings · 66.0 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 703.6 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
