TPS63070 buck-boost module, 3.3V version, with the 3V3 solder pad bridged

TPS63070 Buck-Boost Converter Module 2-16V to 3.3V, 5V or 9V

3.3V
$8.99 NZD
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TPS63070 buck-boost module, 3.3V version, with the 3V3 solder pad bridged
  • TPS63070 buck-boost module, 3.3V version, with the 3V3 solder pad bridged
  • Top view showing the VIN, VOUT, GND, EN, PS and ADJ labels and the 9V, 5V and 3V3 voltage-select pads
  • Underside of the module with the VIN 2V-16V input marking and labelled corner pads
  • Board dimensions: 30 mm long by 16 mm wide
TPS63070 Buck-Boost Converter Module 2-16V to 3.3V, 5V or 9V
SKU: PWR-TPS63070-3V3

TPS63070 Buck-Boost Converter Module 2-16V to 3.3V, 5V or 9V

$8.99 NZD
Output Voltage
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A small buck-boost converter built on the Texas Instruments TPS63070. It takes any DC input from 2V to 16V and holds a steady 3.3V, 5V or 9V output, whether the input is above or below that voltage. That makes it a good fit for battery projects, where a Li-ion cell runs from 4.2V down to 3V and a plain step-up or step-down module would drift out of regulation. Each version has a fixed output, so choose 3.3V, 5V or 9V when you order.

Specifications

Converter chipTI TPS63070 buck-boost
Input voltage2V to 16V DC (starts from about 3V)
Output voltageFixed 3.3V, 5V or 9V (choose version)
Output currentUp to 2A when stepping down, less when boosting (see FAQs)
Switching frequency2.4MHz typical (chip)
No-load current54µA typical (chip)
EfficiencyUp to 95% (chip datasheet)
ConnectionsVIN, VOUT and 2 x GND pads, plus EN and PS
Board size30 x 16 mm

Datasheets

Full technical datasheet PDF

What's in the box

1×
TPS63070 buck-boost module

Set to the output voltage you choose. Bare board, no wires or headers fitted.

Great for

Running an ESP32 at 3.3V from one 18650 cell
A steady 5V for an Arduino or USB device from a Li-ion pack
Powering a 9V device from a 12V battery or a 2-cell pack
Low-ripple power for sensors and audio boards

Wiring & getting started

  1. Check the version

    The bridged solder pad in the 9V / 5V / 3V3 row shows the output voltage. Only one pad is bridged.

  2. Connect the input

    Solder your supply to VIN and the GND pad beside it. Keep the input between 3V and 16V, and check polarity before power-up.

  3. Connect the load

    Wire your load to VOUT and the GND pad beside it. All GND pads are joined on the board.

  4. Leave EN and PS open

    EN is pulled up on the board, so the module runs as soon as it has power. Connect EN to GND to switch the output off. PS can stay open for the lowest ripple.

Note: The chip limits its input current while the output is starting up. If the output does not come up with a heavy load attached, especially on the 9V version, power up with the load reduced and then connect it.

Frequently Asked Questions

Answers to the questions buyers ask most.

Which version should I choose?
Choose the output voltage your project needs. 3.3V suits an ESP32, a Raspberry Pi Pico or 3.3V sensors. 5V suits an Arduino Uno or Nano, USB devices and 5V modules. 9V suits devices that would normally run from a 9V battery or adaptor. The output is fixed, so order the version you need.
How much current can it supply?
It depends on how far the voltage has to be stepped up. As a practical guide: one Li-ion cell to 3.3V or 5V about 1A, one Li-ion cell to 9V about 0.5A, 2 x AA to 3.3V about 0.3 to 0.5A, 12V to 5V about 1.5A and 12V to 9V about 1A. The chip allows up to 2A when stepping down, but the small board gets warm, so leave some headroom.
Will it run from a single 18650 or Li-ion cell?
Yes. It holds the output steady while the cell runs down from 4.2V to about 3V, which is where a buck-boost converter beats a plain step-up or step-down module. It does not protect the cell, so use a protected cell or a battery protection board to stop over-discharge.
Do I need to connect the EN and PS pads?
No. EN is pulled up on the board, so the module turns on with power applied. Connect EN to GND when you want to switch the output off. Leave PS open for fixed-frequency operation with the lowest ripple. The supplier's documentation says bridging the PS pads selects power-save mode, which lowers the current drawn at very light loads.
Can I change the output voltage myself?
Each board is supplied set to the version you order. The voltage is selected by a solder bridge on the 9V / 5V / 3V3 pads. We have not tested re-bridging, so we recommend ordering the voltage you need rather than modifying the board.
What is the maximum input voltage?
16V. That covers a 12V battery, a 2S or 3S Li-ion pack and most 12V adaptors. Do not use it on 18V or 20V tool batteries or a 4S Li-ion pack, which reaches 16.8V when charged.
Is it protected against reverse polarity?
No. Check that VIN and GND are the right way round before power-up. Reversing the supply can damage the converter chip.
Can I use it to charge a battery?
No. It is a regulated power supply, not a charger. It has no charge control or cut-off, so use a proper charger module for charging.

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