{"title":"SparkFun BabyBuck Regulator Breakout - 5V (AP63357)","handle":"sparkfun-babybuck-regulator-breakout-5v-ap63357","url":"/products/sparkfun-babybuck-regulator-breakout-5v-ap63357","description":"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.\n\nWith 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.\n\nKey Features\n\n\nRegulated 5V Output – From 6V to 32V input range\n\nUp to 3.5A Output – 3A recommended without active cooling\n\nUltra-Compact – 0.63\" × 0.52\" PCB with 0.1\" spaced PTH pins\n\nHigh Efficiency – Up to 86% at 5 mA light load (PFM mode)\n\n22 µA Quiescent Current – Excellent for battery-powered applications\n\nEnable Pin – High-voltage EN rated up to 32V with precision UVLO threshold\n\nHeat Sink Pad – 0.5\" × 0.6\" plated copper pad on the back\n\n450 kHz Switching Frequency – With frequency spread spectrum for EMI reduction\n\n\nPin Configuration\n\n\nVIN – Power input (6V to 32V)\n\nGND – Common ground\n\nVOUT – Regulated 5V output\n\nEN – Enable (pull high to enable output)\n\n\nProtection\n\nUndervoltage lockout (UVLO)\nOutput undervoltage protection (UVP)\nCycle-by-cycle peak current limit\nThermal shutdown\n\n\n\nNote: While the AP63357 is rated for 3.5A, expect a practical maximum of 3A due to thermal constraints. Achieving 3.5A requires active cooling.\n\n\nIdeal For\n\nBattery-powered projects needing regulated 5V\nAutomotive and solar panel voltage regulation\nCompact embedded systems\nRaspberry Pi and microcontroller power supplies\n\n\nResources\n\nHookup Guide\nAP63357 Datasheet (PDF)\nSchematic (PDF)\nEagle Files (ZIP)\nBoard Dimensions (PDF)\nManufacturer Product Page (Diodes Inc.)\nHardware Design Files (GitHub)\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1686,"title":"Default Title","sku":"SF-COM-21256","price":12.04,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":192,"option1":"Default Title"}]}