Texas Instruments TPS63070RNMR

Overview

TPS63070RNMR from Texas Instruments is a synchronous buck-boost DC/DC converter IC designed for power supply regulation in battery-powered systems where input voltage may fall above or below the required output. It delivers up to 2 A output current in both buck and boost modes, supports 2.0 V–16 V input and 2.5 V–9 V adjustable output, and achieves up to 95% efficiency with 2.4 MHz fixed-frequency operation. It is used in dual-cell Li-ion portable equipment requiring seamless mode transition and low quiescent current (50 µA typical).

For engineers reviewing the TPS63070RNMR datasheet, TPS63070RNMR pinout, TPS63070RNMR application, or TPS63070RNMR equivalent, key selection considerations include its automatic buck-boost mode switching, ±1% PWM-mode output accuracy, integrated power good (PG) signal, precise enable threshold for sequencing, and QFN package thermal performance (R_θJA = 63°C/W).

Technical Context

The TPS63070RNMR implements average current-mode control using four internal N-channel MOSFETs-two for buck and two for boost paths-with seamless automatic transition between modes based on VIN/VOUT ratio. Its control loop reconstructs inductor current via high-side buck FET sensing and maintains regulation by comparing average current error against buck/boost ramp signals.

It features dual-function PS/SYNC pin supporting forced PWM mode (low), PFM power-save mode (high), or external clock synchronization (2.1–2.8 MHz). The VSEL/FB2 interface enables dynamic dual-output-voltage selection via resistor divider reconfiguration, while integrated protections include undervoltage lockout (1.85 V typ), overtemperature shutdown (160°C), and input/output overvoltage limiting.

Key Specifications

Pinout & Package

The TPS63070RNMR is housed in a thermally enhanced 13-pin VQFN package measuring 2.5 mm × 3 mm with exposed thermal pad (RNMR suffix). This compact, leadless package supports high-density PCB layouts and provides low thermal resistance (R_θJB = 13°C/W) for reliable operation at full load in ambient temperatures up to +125°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS63070RNMR, TPS630701RNMR trades adjustability for simplicity in fixed-rail designs, while TPS630702RNMR adds discharge functionality at identical regulation performance-making TPS63070RNMR the optimal balance of flexibility, efficiency, and feature set for general-purpose adjustable buck-boost applications.

Availability

TPS63070RNMR is available at Aetrix Electronics and suitable for dual-cell Li-ion power management, industrial portable meters, and medical wearable sensors requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS63070RNMR 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.

The TPS6307x product line was engineered for battery-powered portable electronics requiring seamless input-voltage-flexible regulation-targeting applications where VIN may dip below or rise above VOUT, such as handheld instrumentation, mobile computing, and personal medical devices.

FAQ

What is the recommended inductor value for TPS63070RNMR in a typical 5 V output design?

The TPS63070RNMR datasheet specifies an effective inductance range of 0.7 µH to 2.8 µH, with 1.5 µH as the nominal value. For a 5 V output design with 2 A load and 2.4 MHz switching, a shielded 1.5 µH inductor rated for ≥3.6 A saturation current (e.g., 0805 or 1008 case size) is recommended to balance size, efficiency, and transient response. Layout must minimize loop area between L1, L2, VIN, and PGND.

Does TPS63070RNMR support true load disconnect during shutdown?

Yes, the TPS63070RNMR provides load disconnect during shutdown: when EN is pulled low, both high-side and low-side internal MOSFETs turn off, isolating the output from the input. This prevents reverse current flow and ensures zero static current draw from the battery-critical for long-term storage in portable medical or metering devices.

Can TPS63070RNMR be synchronized to an external clock, and what frequency range is supported?

Yes, the PS/SYNC pin of TPS63070RNMR accepts an external clock signal for synchronization. The supported frequency range is 2.1 MHz to 2.8 MHz, matching its internal oscillator's 2.4 MHz nominal frequency. External synchronization eliminates beat frequencies in multi-rail systems and reduces EMI in noise-sensitive applications like audio or precision measurement.

How does the VSEL pin function in TPS63070RNMR, and what external components are required?

The VSEL pin on TPS63070RNMR enables dynamic selection between two output voltages by controlling the FB2 node. When VSEL is high, FB2 is pulled to GND, changing the feedback divider ratio. A typical implementation uses two resistors (R1 from FB to VOUT, R2 from FB to FB2) in the 50–500 kΩ range, plus a feed-forward capacitor across R1 to optimize transient response during voltage transitions.

What thermal derating guidance applies to TPS63070RNMR at 2 A continuous load?

With its 2.5 mm × 3 mm QFN package and R_θJA = 63°C/W, the TPS63070RNMR requires careful thermal design at 2 A. At 125°C max junction temperature and 25°C ambient, the allowable power dissipation is ~1.6 W. Assuming 90% efficiency at 5 V/2 A (10 W output), losses are ~1.1 W-within limit if the thermal pad is fully soldered to ≥1 in² copper area. For sustained 2 A operation above 60°C ambient, forced airflow or additional copper pours are recommended.