Texas Instruments TPS63061DSCR

Overview

TPS63061DSCR from Texas Instruments is a fixed-output 5-V synchronous buck-boost DC/DC converter optimized for dual-cell Li-ion battery systems, delivering up to 2 A in buck mode (VIN < 10 V) and 1.3 A in boost mode (VIN > 4 V), with 2.4-MHz fixed-frequency operation and integrated power-good signaling. It supports input voltages from 2.5 V to 12 V and features automatic buck-to-boost transition, load disconnect during shutdown, and overvoltage/overtemperature protection.

For engineers reviewing the TPS63061DSCR datasheet, TPS63061DSCR pinout, TPS63061DSCR application, or TPS63061DSCR equivalent, key selection criteria include its fixed 5-V output, WSON-10 (3 mm × 3 mm) package, 93% peak efficiency, <30 μA quiescent current, and seamless mode transition behavior under varying input conditions.

Technical Context

The TPS63061DSCR implements an average-current-mode control architecture using four internal N-channel MOSFETs, operating in either buck or boost configuration depending on VIN relative to VOUT - never switching all four simultaneously. One switch remains on and one off to minimize conduction losses, while RMS current through switches and inductors is minimized across the full input range.

Its Buck-Boost Overlap Control™ ensures robust regulation near VIN ≈ VOUT by alternating buck and boost cycles, limiting consecutive same-mode cycles to three. The PS/SYNC pin enables power-save mode (PFM at light loads) or external clock synchronization, and dynamic voltage positioning maintains +3% nominal VOUT at light loads to absorb heavy transient drops.

Key Specifications

Pinout & Package

The TPS63061DSCR is housed in a thermally enhanced 3 mm × 3 mm, 10-pin WSON (DSC) package with an exposed thermal pad that must be soldered to PGND for proper power dissipation and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS63061DSCR, TPS63060DSCR offers flexibility at the cost of added components, while MAX77827BEWC+T trades away PG functionality and thermal performance for size reduction - making TPS63061DSCR optimal for cost-sensitive, thermally demanding 5-V portable designs requiring system-level power monitoring.

Availability

TPS63061DSCR is available at Aetrix Electronics and suitable for dual-cell Li-ion power management, digital still camera power supply, notebook computer subsystems, industrial metering equipment, and high-power LED drivers requiring stable component supply across production lifecycles.

Supply support for TPS63061DSCR 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.

The TPS6306x product line was designed specifically for portable battery-powered systems needing seamless wide-input buck-boost regulation - targeting applications where input voltage spans both above and below the required output.

FAQ

What is the output voltage accuracy of the TPS63061DSCR?

The TPS63061DSCR provides a fixed 5-V output with ±5% tolerance over temperature, line, and load conditions as specified in the electrical characteristics table. This accuracy is achieved via factory-trimmed internal feedback, eliminating external resistor errors and drift. The TPS63061DSCR does not require external compensation for this fixed output, simplifying design validation and reducing test overhead in production.

Does the TPS63061DSCR support external synchronization?

Yes, the TPS63061DSCR supports external clock synchronization via the PS/SYNC pin. When driven with a TTL/CMOS-compatible square wave between 2.2 MHz and 2.6 MHz, the internal PLL locks to the external frequency, reducing EMI by eliminating beat frequencies. This capability is confirmed in Section 7.5 and Figure 8-4 of the official datasheet, and applies identically to the TPS63061DSCR as part of the TPS6306x family.

How does the TPS63061DSCR handle input voltage transitions near 5 V?

The TPS63061DSCR uses Buck-Boost Overlap Control™ to manage VIN ≈ VOUT transitions smoothly: it alternates buck and boost cycles and limits consecutive same-mode operation to three cycles. This prevents control loop instability and output ripple spikes. As verified in Section 8.4.1 and Figure 8-3 of the datasheet, the TPS63061DSCR maintains regulation without dropout or mode-hunting when VIN crosses 5 V during battery discharge.

What thermal considerations apply to the TPS63061DSCR in a 3 mm × 3 mm WSON package?

The TPS63061DSCR has a junction-to-ambient thermal resistance (RθJA) of 48.7°C/W in the DSC package, requiring adequate copper area and thermal vias under the exposed pad connected to PGND. Section 7.4 confirms this value, and layout guidelines in Section 11 mandate soldering the thermal pad to maximize heat transfer. Without proper thermal design, the TPS63061DSCR may trigger thermal shutdown at ~1.5 A continuous load in still air.

Can the TPS63061DSCR be used with a single-cell Li-ion battery?

No - the TPS63061DSCR requires minimum 2.5 V input for startup and stable operation, while a single-cell Li-ion discharges from 4.2 V to ~3.0 V. Below ~3.0 V, output current capability degrades significantly, and the device may drop out of regulation. The datasheet explicitly targets dual-cell Li-ion (6–8.4 V) and multi-cell alkaline/NiMH systems; using TPS63061DSCR with single-cell Li-ion violates recommended operating conditions in Section 7.3.