Texas Instruments LM61495RPHR

Overview

LM61495RPHR from Texas Instruments is a 10-A synchronous buck converter IC operating from 3 V to 36 V input, delivering adjustable output (1 V to 95% of VIN) with 95.1% peak efficiency at 5 V/8 A and 400 kHz, integrated RESET with filtered delayed release, and pin-configurable spread spectrum for CISPR Class B compliance. It targets high-density industrial power rails in PLCs and avionics.

For engineers reviewing the LM61495RPHR datasheet, LM61495RPHR pinout, LM61495RPHR application, or LM61495RPHR equivalent, key selection considerations include its 10-A continuous rating, 4.5 mm × 3.5 mm wettable-flank VQFN package, 200–2200 kHz adjustable switching frequency, functional safety documentation support, and low 5-µA quiescent current in auto mode.

Technical Context

The LM61495RPHR implements a current-mode controlled synchronous buck architecture with dual-random spread spectrum (DRSS) modulation (±5.5% typical), adjustable SW node rise time via RBOOT, and pin-selectable operation modes (Auto PFM/PWM, forced FPWM, or external sync). Its internal compensation, soft-start, thermal shutdown, and accurate current limiting eliminate external components while maintaining regulation down to 3 V after startup.

It features a dedicated BIAS pin supporting external bias up to 12 V or self-bias from output, an open-drain RESET output with 92–96.5% UV and 110–114% OV thresholds referenced to FB voltage, and robust protection including hiccup-mode overcurrent, thermal shutdown (158–180°C trip), and 42-V transient tolerance on VIN pins.

Key Specifications

Pinout & Package

LM61495RPHR uses a 4.5 mm × 3.5 mm, 16-pin VQFN package (RPH) with wettable flanks for solder joint inspection and enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM61480RPHR and LM62460RPHR, the LM61495RPHR provides 25% higher current capacity and extended thermal headroom in the same 4.5 mm × 3.5 mm footprint, enabling single-supply scalability across product families without layout revision.

Availability

LM61495RPHR is available at Aetrix Electronics and suitable for industrial PLCs, avionics power supplies, semiconductor test equipment, and ruggedized industrial PCs requiring stable component supply and long-term production continuity.

Supply support for LM61495RPHR 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 experience in high-reliability industrial and automotive power solutions.

The LM6x4xx family was designed specifically for high-power-density, low-EMI industrial DC-DC conversion - targeting applications where board space, thermal performance, and electromagnetic compatibility are critical constraints.

FAQ

What is the maximum continuous output current supported by the LM61495RPHR?

The LM61495RPHR supports 10 A of continuous output current under recommended operating conditions (TJ ≤ 150°C, proper PCB layout, and adequate thermal management). This rating is validated per TI's EVM testing with θJA = 21.6°C/W and accounts for internal MOSFET RDS(on) derating over temperature. Peak current capability reaches 20 A during short-circuit hiccup events.

Does the LM61495RPHR require external compensation components?

No, the LM61495RPHR features fully integrated compensation circuitry. Its current-mode control architecture eliminates the need for external Type-II or Type-III compensation networks, reducing BOM count and layout complexity. Stability is ensured across all operating conditions, including minimum on-time and dropout scenarios, without user-adjustable compensation.

How does the RESET output of the LM61495RPHR behave during startup and fault conditions?

The LM61495RPHR RESET output remains low until the output voltage reaches 92–96.5% of the target (UV threshold), then releases after a 1.2–3.75 ms delay. It asserts low again if FB falls below this threshold or EN is deasserted. The internal deglitch filter (10–45 µs) prevents false triggering from noise, and the open-drain structure allows flexible pull-up to any compatible logic rail.

Can the LM61495RPHR operate with an input voltage below 3.7 V?

Yes - the LM61495RPHR starts up at a minimum of 3.7 V, but once running, it sustains regulation down to 3.0 V input. This enables operation during brownout conditions in 3.3-V or 5-V systems. However, full 10-A capability and specified efficiency are only guaranteed above 3.95 V when VOUT = 3.3 V, per the datasheet's VVIN_MIN2 specification.

What package type and dimensions does the LM61495RPHR use?

The LM61495RPHR uses a 16-pin VQFN package with designation RPH, measuring 4.5 mm × 3.5 mm with 0.5-mm pitch and wettable flanks. This package supports automated optical inspection of solder joints and delivers excellent thermal performance (θJA = 21.6°C/W on reference EVM), making it ideal for high-power-density industrial designs.