Texas Instruments TPS630702RNMT

Overview

TPS630702RNMT from Texas Instruments is a 2-V to 16-V synchronous buck-boost DC/DC converter with adjustable output (2.5 V to 9 V), 2-A continuous output current in both buck and boost modes, 95% peak efficiency, and integrated output discharge function. It enables stable power delivery in portable systems where input voltage may dip below or rise above the required rail - such as dual-cell Li-ion battery-powered medical monitors and industrial handheld meters.

For engineers reviewing the TPS630702RNMT datasheet, TPS630702RNMT pinout, TPS630702RNMT application, or TPS630702RNMT equivalent, key selection considerations include its 2.5 mm × 3 mm QFN package, VSEL-enabled dual-output-voltage capability, ROD = 200 Ω output discharge resistance, ±1% PWM-mode feedback accuracy, and seamless automatic buck-boost transition without external mode control.

Technical Context

The TPS630702RNMT implements average current-mode control using four internal N-channel MOSFETs, enabling automatic, seamless mode switching between buck and boost based on VIN/VOUT relationship - no external logic required. Its dual-inductor topology (L1/L2) supports bidirectional current flow, including negative inductor current for forced-PWM operation and thermoelectric cooler (TEC) drive.

It integrates a precision enable input (0.8 V rising threshold, 0.7 V falling), programmable soft-start (400–850 μs), power-good monitoring with external pull-up, and PS/SYNC pin supporting both PFM/PWM mode selection and external clock synchronization (2.1–2.8 MHz). The VSEL/FB2 interface allows dynamic reconfiguration of the feedback divider ratio to switch between two regulated output voltages.

Key Specifications

Pinout & Package

TPS630702RNMT is housed in a thermally enhanced 13-pin VQFN package (2.5 mm × 3 mm, 0.5-mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; top-side silkscreen reads "0702".

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost converter applications.

Compared with TPS630701RNMT and TPS63020DSJR, the TPS630702RNMT uniquely combines adjustable output, VSEL-based dual-voltage support, and integrated 200-Ω output discharge - making it the only option among the three for dynamically reconfigurable, safety-critical power rails requiring controlled shutdown discharge.

Availability

TPS630702RNMT is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld meters, and ultra-mobile computing platforms requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TPS630702RNMT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-efficiency DC/DC conversion and automotive-grade reliability.

The TPS6307x family was designed specifically for battery-powered applications where input voltage varies widely - such as dual-cell Li-ion, USB PD, and industrial backup systems - delivering high efficiency across buck, boost, and buck-boost transitions in a minimal footprint.

FAQ

What is the purpose of the VSEL and FB2 pins on the TPS630702RNMT?

The VSEL and FB2 pins on the TPS630702RNMT enable dynamic selection between two regulated output voltages. When VSEL is driven high, FB2 is pulled to GND, altering the feedback divider ratio and raising VOUT to a second preset level. This allows single-converter support for dual-rail systems - for example, switching between 3.3 V for MCU operation and 5 V for USB peripherals - without external switches or additional regulators. The TPS630702RNMT uses this feature to provide flexible, software-controllable power sequencing in compact portable designs.

Does the TPS630702RNMT support true zero-load operation, and what is its quiescent current?

Yes, the TPS630702RNMT supports true zero-load operation with a typical quiescent current of 54 μA into VIN under PFM mode at 6-V input and 5-V output (Tj = –40°C to 85°C). This ultra-low IQ enables multi-week standby in battery-powered applications like environmental data loggers. The TPS630702RNMT maintains regulation down to 0 mA load while preserving ±1% output accuracy in PWM mode and retaining full protection features - including thermal shutdown and overvoltage response - even at no load.

How does the output discharge function work in the TPS630702RNMT, and why is it important?

The TPS630702RNMT includes an integrated 200-Ω output discharge FET activated during shutdown, which actively bleeds charge from the VOUT capacitor to GND. This prevents residual voltage from back-powering downstream circuitry, avoids latch-up in multi-supply systems, and meets safety requirements in medical devices where uncontrolled hold-up voltage could interfere with reset behavior or cause unintended I/O states. Unlike passive discharge solutions, the TPS630702RNMT's active discharge ensures predictable, rapid VOUT decay - a critical differentiator versus TPS63070 and TPS630701 variants.

Can the TPS630702RNMT synchronize to an external clock, and what is the supported frequency range?

Yes, the TPS630702RNMT can synchronize to an external clock applied to the PS/SYNC pin, supporting frequencies from 2.1 MHz to 2.8 MHz. This capability allows EMI reduction through frequency dithering or alignment with system clocks to avoid beat frequencies. The PS/SYNC pin contains a dedicated high-speed digital input stage for clock reception, independent of its PWM/PFM mode control function. When the external clock is removed, the TPS630702RNMT automatically reverts to its internal 2.4-MHz oscillator or enters PFM mode based on load conditions - ensuring uninterrupted operation during clock loss.

What thermal performance can be expected from the TPS630702RNMT in a standard 2-layer PCB layout?

In a standard 2-layer PCB with 1-in² copper pour connected to the exposed thermal pad, the TPS630702RNMT achieves a junction-to-board thermal resistance (RθJB) of 13°C/W and a junction-to-ambient resistance (RθJA) of 63°C/W. At 2-A load with 5-V input/output, this translates to ~35°C temperature rise above ambient - well within the 125°C maximum junction rating. For higher-power or sealed-environment applications, adding internal copper layers or thermal vias under the pad further reduces RθJB to ≤6°C/W, enabling full 2-A operation at 60°C ambient without derating. The TPS630702RNMT's thermal shutdown triggers at 160°C with 20°C hysteresis for robust protection.