This module adopts the TPS63020 voltage boosting chip, which has a low output ripple, stable performance, and a switching frequency of up to 2 4MHZ， In most cases, the output current is greater than 900ma (no need for heat dissipation at room temperature), and there are multiple output versions available, including 3.3V, 4.2V, and 5V, which are very suitable for various 3.3V and 5V single-chip microcontrollers powered by lithium batteries and USB. The module also reserves two modes for users to choose from: high-performance mode and power-saving mode.
The module is a typical buck boost structure with an input voltage range of 1.8-5 The 5V output current can meet the power supply needs of various models such as STM32, ESP32, and 51 microcontrollers. It defaults to power-saving mode to increase the battery life of input devices such as batteries.

Module type: buck boost power supply
Input voltage: DC 1.8-5.5V
Output current: 3 [email protected] / 4. 2V@1. 2A / 5V@1A (3. 7V input)
Output voltage: DC 3.3/4.2/5V
Switching frequency: about 2 4MHZ
Static power consumption: Working mode: High performance/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 pin arrangement
Module size: 17.4 x 26.2mm (manually measured, with deviation)

VIN: Power input positive pole, 1.8-5.5V
GND: Input/output negative pole, shared
VOUT: Power output terminal, 3. 3/4.2/5V
PS: Short circuit pad enables high-performance mode
EN: Suspended enable, low-level disable
Voltage jumper pad: Short circuiting enables corresponding voltage, and it is prohibited to disconnect or short-circuit multiple at the same time