This module employs the TPS63070 power management IC solution, offering stable performance with low ripple and a maximum current output capability of 2A. It features two operating modes: PWM mode and PFM power-saving mode, which users can adjust as needed (shipped in PWM mode by default; users requiring PFM power-saving mode can switch manually). The module offers three fixed voltage outputs: 3.3V, 5V, and 9V. An ADJ pad is provided for users to solder resistors of different values to modify the output voltage. With a low operating voltage of 2.0V, it is suitable for boosting small voltages to common levels like 3.3V or 5V for powering downstream sensors. It can also boost lithium battery voltage to supply 9V multimeters. The module delivers a maximum output current of 2A. In high-current applications, monitor module temperature and add heat dissipation as needed. Unless otherwise specified, all parameters below were tested in PWM mode (recommended operating mode). Note: Only one jumper pad may be shorted for output voltage selection. Do not short multiple pads simultaneously. Additionally, only one of the three pads and the ADJ resistor may be used at a time. ADJ configuration resistor formula: ADJ = (15000 * VOUT) / 0.8 - 15000 About Output 1. This is an auto buck-boost module operating with input voltages from 2V to 16V, providing outputs from 2.5V to 9V. 2. The module offers three fixed voltage outputs: 3.3V, 5V, 9V, plus a configurable pad where the output voltage changes based on the resistor value connected.