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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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

Pin Number	Pin Name	Description
1	VIN	Voltage Input Pin (2V - 16V)
2	GND	Ground

J2 - Power Good (PG) Indicator

Pin Number	Pin Name	Description
1	PG	Power Good signal, indicating output voltage status.
2	GND	Ground

J3 - Output Connector

Pin Number	Pin Name	Description
1	VOUT	Adjustable Buck-Boost output (3.3V - 5V - 7.5V - 9V)
2	GND	Ground

JP1 - Enable Control

Pin Number	Pin Name	Description
1	LOW	Connect to GND
2	EN	Regulator Enable Pin (Default: HIGH). Set LOW to disable the regulator.
3	HIGH	Connect to VIN

JP2 - Power Save / Synchronization Mode

Pin Number	Pin Name	Description
1	LOW	Open drain power good output
2	PS/SYNC	Selects between forced PWM and power-save mode. Default: LOW (PWM Mode).
3	HIGH	Connect to VIN

JP3 - Voltage Selection

Pin Number	Pin Name	Description
1	LOW	Open drain power good output
2	V_SEL	Voltage selection input (Default: LOW for 3.3V). Set HIGH to select another voltage.
3	HIGH	Connect to VIN

Voltage Selection Pads

Pad	Description
9V	Select 9V output by jumping this pad
7.5V	Select 7.5V output by jumping this pad
5V	Select 5V output by jumping this pad

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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

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Ready to integrate? You can purchase the TPS630702RNMT Breakout Board directly from our Online Store . Worldwide shipping is available for engineering samples and production batches.