Texas Instruments V62/07616-03XE

Overview

TPS54356MPWPREP from Texas Instruments is a radiation-hardened, synchronous buck PWM converter with integrated 100-mΩ high-side MOSFET and external low-side gate driver (LSG), delivering up to 3 A continuous output current at 3.3 V from 4.5–20 V input. It features fixed 3.3 V output, 500 kHz internal switching frequency, power-good (PWRGD) monitoring, and 180° out-of-phase synchronization capability for multi-rail systems in defense avionics and spaceborne power supplies.

For engineers reviewing the TPS54356MPWPREP datasheet, TPS54356MPWPREP pinout, TPS54356MPWPREP application, or TPS54356MPWPREP equivalent, key selection criteria include its –55°C to 125°C military-grade temperature range, PowerPAD™ TSSOP-16 package thermal performance, UVLO adjustability via external resistor divider, and compatibility with synchronous rectification using discrete low-side MOSFETs.

Technical Context

The TPS54356MPWPREP implements a feed-forward modulator architecture with constant modulator gain (K_m = 8) independent of input voltage or switching frequency, enabling stable transient response across wide VIN and load ranges. Its adaptive dead-time control prevents shoot-through by sequencing LSG turn-off before PH turn-on and vice versa, based on real-time gate voltage sensing.

It integrates a precision 0.891 V reference trimmed during production, a high-gain error amplifier (60 dB open-loop gain, 2 MHz unity-gain bandwidth), and a bidirectional SYNC pin that auto-configures as input or output depending on RT pin state-enabling seamless 180° interleaving without external logic.

Key Specifications

Pinout & Package

TPS54356MPWPREP is housed in a thermally enhanced 16-pin PowerPAD™ Thin Shrink Small-Outline Package (HTSSOP-PWP), with exposed thermal pad soldered to PCB ground plane for <15°C/W θ_JA in 2-layer designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54356MPWPREP, TPS54356-EP lacks extended temperature validation and long-term supply assurance, while LM5008AMHE/NOPB sacrifices 6× output current, synchronous rectification, and power-good signaling - making neither a drop-in replacement but only context-specific alternatives.

Availability

TPS54356MPWPREP is available at Aetrix Electronics and suitable for defense avionics, spacecraft power management, and medical imaging systems requiring stable component supply across extended product lifecycles and extreme environmental conditions.

Supply support for TPS54356MPWPREP 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 high-reliability components, with decades of heritage in space-qualified and military-grade power management ICs.

The TPS5435x family was designed specifically for ruggedized point-of-load regulation in defense, aerospace, and medical systems - emphasizing radiation tolerance, extended temperature operation, and long-term manufacturability under controlled baselines.

FAQ

What is the guaranteed operating temperature range for the TPS54356MPWPREP?

The TPS54356MPWPREP is specified for continuous operation from –55°C to +125°C junction temperature, validated per MIL-PRF-38535 requirements for enhanced product (EP) devices. This range covers extreme environments such as high-altitude avionics bays and unheated satellite compartments, with thermal shutdown activating at 165°C and 7°C hysteresis ensuring safe recovery.

Does the TPS54356MPWPREP require an external low-side MOSFET to function?

No - the TPS54356MPWPREP operates as a synchronous buck converter only when an external low-side n-channel MOSFET is connected to the LSG pin and source tied to PGND. If no MOSFET is used, a Schottky diode must be placed from PH to PGND. The device functions correctly in either configuration, but synchronous mode improves efficiency by 3–5% at full load.

How is the power-good (PWRGD) signal asserted on the TPS54356MPWPREP?

The TPS54356MPWPREP asserts PWRGD high-impedance (open-drain) when VSENSE reaches ≥97% of nominal output (i.e., ≥3.201 V for 3.3 V version), with a 2 ms rising-edge delay at 500 kHz switching frequency. It pulls low on any fault condition including UVLO, overcurrent, thermal shutdown, or VBIAS undervoltage - enabling robust system power sequencing.

Can the TPS54356MPWPREP be synchronized to an external clock source?

Yes - the TPS54356MPWPREP's SYNC pin functions as a falling-edge-triggered input when an external resistor is connected from RT to AGND. The oscillator must be programmed to run at 90–110% of the external sync frequency (e.g., RT = 100 kΩ for ~500 kHz), and a 10-kΩ pull-down resistor is mandatory on SYNC to ensure stable operation and prevent floating states.

What is the purpose of the UVLO pin on the TPS54356MPWPREP, and how is it configured?

The UVLO pin on the TPS54356MPWPREP allows overriding the internal 4.49 V start / 3.69 V stop thresholds using an external resistor divider from VIN to AGND. Connecting a 1-kΩ resistor from UVLO to AGND and calculating R1 per TI's Equation 1 enables precise rail sequencing - critical for preventing partial power-up in multi-voltage systems like radar transceivers or medical imaging backplanes.