Texas Instruments TPS65282RGER

Overview

TPS65282RGER from Texas Instruments is a dual-power-distribution-switch PMIC with integrated 4-A synchronous buck regulator. It delivers precision current-limited USB power switching (75 mA–2.7 A) and wide-input (4.5 V–18 V) DC/DC conversion with 0.8 V ±1% feedback reference, used in digital TV, set-top boxes, and tablet PCs for robust short-circuit and reverse-voltage protection.

For engineers reviewing the TPS65282RGER datasheet, TPS65282RGER pinout, TPS65282RGER application, or TPS65282RGER equivalent, key selection considerations include programmable switching frequency (300 kHz–1.4 MHz), dual independent enable/fault signaling (EN_SW1/2, nFAULT1/2), thermal shutdown (160°C trip), and QFN-24 RGE package compatibility with high-current PCB layout requirements.

Technical Context

The TPS65282RGER integrates two independent N-channel power distribution switches with back-to-back MOSFETs for reverse-voltage blocking and cycle-by-cycle current limiting, plus a peak-current-mode synchronous buck converter with internal 100-mΩ high-side and 60-mΩ low-side FETs. Its ROSC pin enables resistor-programmable switching frequency across 300 kHz–1.4 MHz.

It implements latch-off overcurrent protection with 10-ms deglitch timing, active-low open-drain nFAULT outputs per switch, and a dedicated 6.3-V internal LDO (V7V) powering gate drivers and control logic. The buck section features soft-start (1.2 ms internal or capacitor-adjustable), PGOOD monitoring, and hiccup-mode fault response during hard shorts.

Key Specifications

Pinout & Package

TPS65282RGER uses a thermally enhanced 24-pin QFN (RGE) package, 4 mm × 4 mm, with exposed thermal pad soldered to PCB ground for optimal junction-to-board thermal resistance (θJB = 16.9°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-switch + buck PMIC applications.

Compared with TPS2557DRCT and TPS65270RGET, the TPS65282RGER uniquely combines dual independently enabled switches with reverse-voltage blocking, latch-off OCP, and a fully programmable buck converter-making it optimal for space-constrained, safety-critical USB host systems requiring both rail generation and port protection.

Availability

TPS65282RGER is available at Aetrix Electronics and suitable for digital TV, set-top box, and tablet PC applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for TPS65282RGER 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 broad industrial and consumer application focus.

The TPS65282RGER belongs to TI's Power Management IC portfolio designed for compact, high-reliability USB power distribution and system rail generation in entertainment and portable computing devices.

FAQ

What is the maximum continuous output current supported by the buck converter in the TPS65282RGER?

The TPS65282RGER buck converter supports a maximum continuous output current of 4 A. This rating is validated across the full input range (4.5 V–18 V) and ambient temperature range (–40°C to 125°C), assuming adequate PCB thermal design with the exposed thermal pad properly soldered and via-stitched to ground planes.

How does the TPS65282RGER implement reverse-voltage protection, and what is its trip threshold?

The TPS65282RGER uses an internal comparator that monitors SW_OUT relative to SW_IN. When SW_OUT exceeds SW_IN by 135 mV (typical) for 4 ms (typical), the affected power switch is turned off and nFAULT1 or nFAULT2 is asserted low. The switch remains latched off until the EN or EN_SWx pin is toggled or power is cycled-ensuring no backfeed into upstream circuitry.

Can the switching frequency of the TPS65282RGER buck converter be adjusted, and how is it configured?

Yes, the TPS65282RGER buck switching frequency is programmable from 300 kHz to 1.4 MHz using an external resistor connected between ROSC and ground. A 51-kΩ resistor yields ~560 kHz; 130-kΩ yields ~1.4 MHz. Floating ROSC or connecting it to V7V selects a fixed 600-kHz default, while grounding selects 300 kHz.

What is the purpose of the V7V pin on the TPS65282RGER, and how must it be decoupled?

The V7V pin is the output of an internal LDO that regulates to 6.3 V (typical) and powers the gate drivers and control logic. It must be decoupled to PGND with a minimum 1-µF ceramic capacitor placed as close as possible to the pin. TI recommends a single-point ground connection between AGND and PGND at the V7V capacitor's negative terminal to minimize noise coupling.

Does the TPS65282RGER support soft-start for the buck converter, and how is it implemented?

Yes, the TPS65282RGER supports adjustable soft-start via the SS pin. An internal 5-µA current source charges an external capacitor connected from SS to ground, setting the ramp time. With SS floating, the internal soft-start time is 1.2 ms. This feature prevents inrush current and enables controlled power-up sequencing with other system rails.