This module adopts the TPS63070 power chip solution, which has stable performance, low ripple, and a maximum current output capability of 2A. The module has two working modes, PWM mode and PFM power-saving mode, which users can adjust by themselves (default PWM mode is shipped, users who need PFM power-saving mode can switch it by themselves). The module design has three fixed voltage outputs, namely 3.3V, 5V, and 9V, and there are ADJ pads available for users to solder resistors of different resistance values to change the output voltage.
The working voltage as low as 2.0V can be applied in scenarios where small voltages are boosted to common voltages such as 3.3V and 5V to power downstream sensors. It can also be used to boost lithium-ion batteries to power 9V multimeters. The module can output a maximum current of 2A. In high current applications, attention should be paid to the module's heating situation and heat dissipation should be increased according to the actual situation.

Module type: DC automatic buck boost power supply
Starting voltage: 2.8V (after starting, the module can output normally within the input voltage range of 2V-9V)
Input voltage: 2V -16V
Output voltage: 2.5V-9V
Output current: 2A (MAX)
Working mode: PWM/PFM
Output ripple: 10mV (9V), 8mV (5V), 8mV (3.3V)
Adjustment method: jumper pad selection
Module size: 16mm 30mm

VIN: Positive pole of power input (2V-16V)
GND: Negative pole of power input/output
VOUT: Positive pole of power output
EN: Enable control (default enable, pulling the pin low is disabled)
PS: Mode configuration, default PWM mode, short-circuit pad to PFM mode
9V: Output voltage selection, short circuit output 9V
5V: Output voltage selection, short circuit output 5V
3.3V: Output voltage selection, short circuit output 3.3V
ADJ: Output voltage configuration, users can configure resistors to adjust the output voltage themselves