Texas Instruments TPS56836RPAR

Overview

TPS56836RPAR from Texas Instruments is an 8A synchronous buck converter operating in Out-of-Audio™ (OOA) mode to eliminate audible noise in power supplies. It delivers regulated output voltages from 0.6V to 13V across a 4.5V–28V input range, integrates 20.4mΩ/9.5mΩ MOSFETs, and supports selectable 500/800/1200kHz switching frequencies-ideal for compact, low-noise industrial and consumer power rails.

For engineers reviewing the TPS56836RPAR datasheet, TPS56836RPAR pinout, TPS56836RPAR application, or TPS56836RPAR equivalent, key selection criteria include OOA-mode noise suppression, adjustable valley current limit via MODE pin, built-in output discharge (200Ω), ±1% 0.6V reference, and non-latched UV/OV/OT/OC protections over –40°C to +150°C junction temperature.

Technical Context

The TPS56836RPAR implements D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable regulation without external compensation and full compatibility with ultra-low-ESR MLCC output capacitors. Its OOA mode modulates switching frequency to avoid 20Hz–20kHz audio band excitation while maintaining fast transient response.

Mode selection via resistor-connected MODE pin configures both switching frequency (500/800/1200kHz) and low-side valley current limit (7.2A or 9.6A typ). Soft-start time is adjustable via SS pin capacitor or defaults to 1.8ms; power-good (PG) provides open-drain output with 64µs delay and 85–115% VFB thresholds.

Key Specifications

Pinout & Package

TPS56836RPAR uses a 10-pin 3.0mm × 3.0mm HotRod™ QFN (RPA package) with exposed thermal pad for enhanced power dissipation and low-inductance layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS56837RPAR and TPS56838RPAR, the TPS56836RPAR uniquely balances low-noise operation, 8A capability, and broad input range-making it optimal for industrial and consumer applications where audible switching must be eliminated without compromising transient performance or thermal robustness.

Availability

TPS56836RPAR is available at Aetrix Electronics and suitable for industrial PC, smart monitor, factory automation controller, and video conferencing system designs requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for TPS56836RPAR 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 TPS5683x family-including TPS56836RPAR-is engineered for compact, high-current point-of-load regulation in industrial, computing, and consumer electronics where low EMI, thermal resilience, and acoustic performance are critical.

FAQ

What is the primary functional distinction of TPS56836RPAR within the TPS5683x family?

The TPS56836RPAR operates exclusively in Out-of-Audio™ (OOA) mode, which dynamically shifts its switching frequency outside the 20Hz–20kHz audible range to prevent coil whine-unlike the Eco-mode TPS56837RPAR or FCCM-based TPS56838RPAR. This makes the TPS56836RPAR the only variant optimized for silent operation in acoustically sensitive environments such as medical displays or conference hardware, while retaining identical 8A capability, D-CAP3™ control, and 3.0mm × 3.0mm HotRod™ QFN packaging.

How does the MODE pin configure TPS56836RPAR functionality?

The MODE pin on the TPS56836RPAR selects both switching frequency (500/800/1200kHz) and low-side valley current limit (7.2A or 9.6A typ) via a resistor to AGND. The device reads this voltage at startup and latches the setting until VIN or EN is cycled. For example, a 102kΩ resistor configures 800kHz operation with 7.2A current limit. No external clock or digital interface is required-configuration is purely resistive and deterministic, simplifying layout and reducing BOM count compared to I²C-programmable alternatives.

Does TPS56836RPAR support pre-biased output startup?

Yes, the TPS56836RPAR supports pre-biased output startup. When the output capacitor holds residual voltage at enable, the device first discharges the SS pin capacitor to prevent inrush, then initiates soft-start only after the internal reference exceeds the feedback voltage (VFB). This behavior avoids reverse current flow into the output rail and ensures controlled ramp-up-even when powering downstream circuits already partially energized-making the TPS56836RPAR suitable for complex power sequencing in multi-rail systems.

What thermal performance can be expected from TPS56836RPAR in a standard 4-layer PCB?

In a standard 4-layer evaluation board with thermal vias under the exposed pad, the TPS56836RPAR achieves an effective junction-to-ambient thermal resistance (Eff RθJA) of 30°C/W. At 8A output with 12V input and 5V output, typical power dissipation is ~1.2W, resulting in ~36°C junction-to-ambient rise above ambient-well within the –40°C to +150°C operating range. This enables reliable full-load operation without forced airflow in most industrial enclosures, provided the thermal pad is soldered with ≥8 thermal vias (0.3mm diameter) to inner ground planes.

How does the power-good (PG) signal behave during fault conditions on TPS56836RPAR?

The PG pin on the TPS56836RPAR is an open-drain output that goes low during soft-start, undervoltage (VOUT < 85% VFB), overvoltage (VOUT > 115% VFB), thermal shutdown (>150°C), or EN disable. It asserts low after a fixed 64µs delay on rising edge and 32µs on falling edge. During non-latched faults like OV or OC, PG remains low until the condition clears and regulation resumes-providing unambiguous system-level status without requiring external monitoring circuitry or microcontroller polling.