Texas Instruments TPS54362HPWP

Overview

TPS54362HPWP from Texas Instruments is a high-temperature, 1-A, 48-V input asynchronous step-down DC/DC converter with integrated voltage supervisor, 0.8 V ±1.5% reference, 200 kHz–2.2 MHz programmable switching frequency, and operation from –55°C to 175°C. It delivers regulated output from 0.9 V to 18 V in buck mode and supports down-hole drilling and extreme-environment power systems.

For engineers reviewing the TPS54362HPWP datasheet, TPS54362HPWP pinout, TPS54362HPWP application, or TPS54362HPWP equivalent, this device is selected for high-voltage transient tolerance (60 V), ultra-low quiescent current (65 μA typical in PFM), programmable reset delay, slew-rate-controlled FET switching, and external clock synchronization - all validated for extended temperature operation.

Technical Context

The TPS54362HPWP implements voltage-mode control with input voltage feed-forward for improved line regulation and cycle-by-cycle current limiting. Its internal 600 mΩ high-side MOSFET supports up to 1 A load at 175°C with thermal derating, and its programmable RT resistor sets oscillator frequency across 200 kHz–2.2 MHz.

It integrates dual supervisory functions: an open-drain reset (nRST) with user-programmable Cdly delay (2.2 ms–200 ms) and threshold filtering (20 μs deglitch), plus overvoltage protection via OV_TH that disables the internal switch without asserting reset - both referenced to the 0.8 V internal bandgap.

Key Specifications

Pinout & Package

TPS54362HPWP is housed in a thermally enhanced 20-pin HTSSOP PowerPAD™ package (PWP), with exposed thermal pad requiring PCB solder connection for junction-to-board thermal resistance of 1.1°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164HTQDDAQ1 and TPS543C20RHFT, the TPS54362HPWP uniquely combines 175°C operation, integrated voltage supervision (reset + OV), and 65 μA light-load quiescent current - making it the only option qualified for long-duration down-hole or aerospace deployments requiring autonomous fault response.

Availability

TPS54362HPWP is available at Aetrix Electronics and suitable for down-hole drilling equipment, high-temperature sensor nodes, aerospace actuator control units, electric vehicle battery management interfaces, and industrial process controllers requiring stable component supply across extended temperature lifecycles.

Supply support for TPS54362HPWP 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 power management solutions, with decades of heritage in automotive, industrial, and aerospace markets.

The TPS54362HPWP belongs to TI's high-temperature DC/DC converter product line, engineered specifically for mission-critical applications where standard commercial or automotive-grade parts fail - including oilfield instrumentation, jet engine controls, and space-qualified subsystems.

FAQ

What is the maximum input voltage the TPS54362HPWP can withstand?

The TPS54362HPWP has an absolute maximum input voltage rating of 60 V and is designed to withstand transients up to that level while operating continuously from 3.6 V to 48 V. This makes it suitable for harsh environments like down-hole drilling where load-dump spikes occur. The device incorporates internal protection circuitry to prevent damage during such events, and its thermal design supports sustained operation at 175°C junction temperature even under these conditions. Always observe recommended operating conditions in the SLVSBI9 datasheet for reliable performance.

Does the TPS54362HPWP support external clock synchronization?

Yes, the TPS54362HPWP supports external clock synchronization via the SYNC pin, which accepts input frequencies from 180 kHz to 2.2 MHz. When an external clock is applied, it overrides the internal oscillator set by the RT resistor, enabling deterministic switching alignment in multi-rail systems. The internal clock resumes automatically if the SYNC signal remains static for >32 μs. This feature is fully functional across the entire –55°C to 175°C operating range and is documented in the SLVSBI9 datasheet timing specifications.

How is the reset delay time programmed on the TPS54362HPWP?

The reset delay time on the TPS54362HPWP is programmed using an external capacitor on the Cdly pin, with a linear relationship of 1 ms per nanofarad (PORdly = 1 ms/nF × C). For example, a 4.7 nF capacitor yields approximately 4.7 ms delay before the nRST pin is released high after VReg exceeds the RST_TH threshold. This delay is active during power-up only and is disabled during power-down events. The Cdly pin leakage current is specified at 1.3–2.8 μA across temperature, ensuring predictable timing across the full –55°C to 175°C range.

What is the purpose of the Rslew pin on the TPS54362HPWP?

The Rslew pin on the TPS54362HPWP controls the slew rate of the internal high-side MOSFET switch by adjusting gate drive current. Connecting a resistor between Rslew and GND sets the turn-on/turn-off speed: lower resistance increases slew rate (faster switching, higher EMI), higher resistance reduces it (slower switching, lower EMI, slightly reduced efficiency). This allows designers to optimize the trade-off between electromagnetic compatibility and power loss in sensitive high-temperature environments - a capability not found in most standard buck converters.

Can the TPS54362HPWP operate in low-power mode without external control?

Yes, the TPS54362HPWP enters low-power mode (LPM) automatically when the converter transitions into discontinuous conduction mode (DCM) - typically under light-load conditions. In this state, quiescent current drops to 65 μA typical, extending battery life. The device also supports digital LPM control via the LPM pin: pulling it low forces LPM, leaving it open (internal pull-down) enables automatic mode, and pulling it high forces normal fixed-frequency operation regardless of load. All modes function across the full –55°C to 175°C temperature range.