# TPS630702RNMT Breakout Board

### Overview

The Boardoza TPS630702RNMT is a high-efficiency, wide-input range Buck-Boost converter module designed to provide a regulated output voltage from power sources that can be either higher or lower than the target output. Built around the Texas Instruments TPS630702 regulator engine, this board utilizes a fixed-frequency PWM controller with synchronous rectification to achieve efficiencies up to 95%.

This module is specifically engineered for dynamic power environments, such as battery-operated systems where the voltage degrades over time (e.g., a single Li-Ion cell discharging from 4.2V to 2.8V). Its seamless automatic transition between Buck (step-down) and Boost (step-up) modes ensures a stable power rail without the drop-outs associated with standard LDOs or single-topology switchers.

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<div align="left"><figure><img src="/files/ZIWoA13x9p7qlYLilbFL" alt="" width="375"><figcaption></figcaption></figure></div>

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### Core Technical Specifications

The module is defined by the following operational parameters:

* Topology: Synchronous Buck-Boost Converter with automatic mode transition.
* Input Voltage Range: Extremely wide input support from 2.0V to 16V, accommodating diverse sources from dual alkaline cells to 12V automotive rails.
* Output Voltage: User-selectable presets via onboard jumpers. Default is 3.3V, with hardware configurability for 5V, 7.5V, and 9V.
* Current Capacity: Capable of delivering up to 2A continuous output current in both Buck and Boost modes (depending on Vin/Vout ratio).
* Efficiency: Peak efficiency rating of 95%, minimizing thermal waste in compact enclosures.
* Quiescent Current: Ultra-low standby current consumption (typically 50 µA), critical for extending battery shelf life.
* Physical Dimensions: A standardized 40 mm x 60 mm PCB footprint.

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### Key Engineering Features

#### Seamless Buck-Boost Transition

The core advantage of this module is its ability to maintain a fixed output voltage while the input voltage crosses the regulation threshold. For example, when powering a 3.3V system from a Li-Po battery (4.2V to 3.0V), the module starts in Buck mode and automatically switches to Boost mode as the battery drains, extracting the maximum possible energy from the cell.

#### Configurable Power Modes

To optimize performance for specific loads, the board includes a PS/SYNC jumper.

* Power Save Mode (PSM): Improves efficiency at light loads by reducing switching frequency (PFM), ideal for idle microcontrollers.
* Forced PWM Mode: Maintains a fixed switching frequency for low output ripple and low noise, which is preferable for sensitive analog or audio circuits.

#### Integrated System Protection

The module features a robust safety architecture including Output Overvoltage Protection, Overtemperature Shutdown, and Undervoltage Lockout (UVLO). Notably, it includes a "Load Disconnect" feature during shutdown, which physically isolates the output from the input to prevent battery leakage currents.

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### **Board Pinout**

#### **J1 - Power Input Connector**

<table><thead><tr><th width="150.0859375" align="center">Pin Number</th><th width="200.12109375" align="center">Pin Name</th><th>Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">VIN</td><td>Voltage Input Pin (2V - 16V)</td></tr><tr><td align="center">2</td><td align="center">GND</td><td>Ground</td></tr></tbody></table>

#### **J2 - Power Good (PG) Indicator**

<table><thead><tr><th width="150.69921875" align="center">Pin Number</th><th width="199.75390625" align="center">Pin Name</th><th>Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">PG</td><td>Power Good signal, indicating output voltage status.</td></tr><tr><td align="center">2</td><td align="center">GND</td><td>Ground</td></tr></tbody></table>

#### **J3 - Output Connector**

<table><thead><tr><th width="150.13671875" align="center">Pin Number</th><th width="199.68359375" align="center">Pin Name</th><th>Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">VOUT</td><td>Adjustable Buck-Boost output (3.3V - 5V - 7.5V - 9V)</td></tr><tr><td align="center">2</td><td align="center">GND</td><td>Ground</td></tr></tbody></table>

#### **JP1 - Enable Control**

<table><thead><tr><th width="149.73046875" align="center">Pin Number</th><th width="200.48046875" align="center">Pin Name</th><th>Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">LOW</td><td>Connect to GND</td></tr><tr><td align="center">2</td><td align="center">EN</td><td>Regulator Enable Pin (Default: HIGH). Set LOW to disable the regulator.</td></tr><tr><td align="center">3</td><td align="center">HIGH</td><td>Connect to VIN</td></tr></tbody></table>

#### **JP2 - Power Save / Synchronization Mode**

<table><thead><tr><th width="150.140625" align="center">Pin Number</th><th width="199.921875" align="center">Pin Name</th><th>Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">LOW</td><td>Open drain power good output</td></tr><tr><td align="center">2</td><td align="center">PS/SYNC</td><td>Selects between forced PWM and power-save mode. Default: LOW (PWM Mode).</td></tr><tr><td align="center">3</td><td align="center">HIGH</td><td>Connect to VIN</td></tr></tbody></table>

#### **JP3 - Voltage Selection**

<table><thead><tr><th width="149.91796875" align="center">Pin Number</th><th width="200.34765625" align="center">Pin Name</th><th>Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">LOW</td><td>Open drain power good output</td></tr><tr><td align="center">2</td><td align="center">V_SEL</td><td>Voltage selection input (Default: LOW for 3.3V). Set HIGH to select another voltage.</td></tr><tr><td align="center">3</td><td align="center">HIGH</td><td>Connect to VIN</td></tr></tbody></table>

#### **Voltage Selection Pads**

<table><thead><tr><th width="200.359375" align="center">Pad</th><th>Description</th></tr></thead><tbody><tr><td align="center">9V</td><td>Select 9V output by jumping this pad</td></tr><tr><td align="center">7.5V</td><td>Select 7.5V output by jumping this pad</td></tr><tr><td align="center">5V</td><td>Select 5V output by jumping this pad</td></tr></tbody></table>

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### Applications

* Battery-Powered IoT: Stabilizing 3.3V rails from single-cell Li-Ion or 2xAA batteries.
* Industrial Sensors: Providing clean 5V or 9V from fluctuating 12V or 24V industrial buses.
* USB Power Delivery: Boosting 3.7V battery voltage to stable 5V for USB OTG applications.
* Portable Instrumentation: Ensuring constant performance as battery voltage declines over the discharge curve.

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### Board Dimensions

![Dimension](https://github.com/Boardoza/Boardoza_TPS630702_Buck-Boost_Converter_Breakout_Board/raw/main/assets/TPS630702%20Dimension.png)

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{% hint style="info" %}
Ready to integrate? You can purchase the **TPS630702RNMT Breakout Board** directly from our [Online Store ](https://www.robotshop.com/products/acrome-tps630702-adjustable-buck-boost-converter-module?qd=e280e4816aa6ddbe7b0b678782fa14fc) . Worldwide shipping is available for engineering samples and production batches.
{% endhint %}


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