This module adopts the TPS63802 voltage lifting and lowering scheme, with low output ripple, stable performance, switching frequency greater than 1.4MHz, and output current 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. The same module reserves two modes for users to choose from: conventional working mode and power-saving mode. The module has a typical voltage rise and fall structure, with an input voltage range of 1.3-5.5V (higher than 1.8V for startup) and an output current of 1A or more, 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.

Module type: Boosting and lowering 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 pads (can also be connected to 2 54mm needle arrangement)
Module size: 12.8 x 25 8mm (manual measurement with deviation)

Pin function
VIN: Power input positive pole, 1.3-5.5V (starting 1.8V)
GND: Input output negative pole, shared
VOUT: Power output terminal, 3 3/4.2/5V
PS: Short circuit solder pads enable power-saving mode
Voltage Jumper Pads: Short circuiting enables corresponding voltage, prohibiting simultaneous disconnection or short circuiting of multiple