This module adopts the TI special chip TPS63802 voltage regulation scheme, with low output ripple and stable performance. The switching frequency is greater than 1.4MHZ, and the output current is mostly greater than 800ma. It provides multiple output versions of 3.3V 4.2V and 5V, which are very suitable for various situations where 3.3V 5V microcontrollers use lithium batteries and USB for power supply. Similarly, the module reserves two modes for users to choose from: conventional working mode and energy-saving mode. The module is a typical voltage up and down structure, with an input voltage range of 1.3-5.5V (higher than 1.8V for startup) and an output current of over 1A, meeting the power supply needs of various models such as STM32, ESP32, 51 microcontroller, etc. The board is equipped with red LED output indicator lights and supports power saving mode to increase the battery life of input devices such as batteries.

2、 Parameter Introduction

Module type: voltage rise and fall power supply

Input voltage: DC 1.3-5.5V (starting 1 8V)

Output current: 3 3V@1. 2A/4 2V@1A / 5V@1A

(3.7V input)

Output voltage: DC 3 3/4. 2/5V

Switching frequency: ≥ 1.4MHZ

Working mode: Normal/Power saving mode

Adjustment method: Jumper pad selection, 3 3/4. 2/5V

Module interface: Large area solder pad (can also be connected to 2 54mm needle arrangement)