Texas Instruments V62/15604-01YE

Overview

TPS57140-EP from Texas Instruments is a radiation-hardened 42-V, 1.5-A synchronous step-down DC/DC converter with integrated 200-mΩ high-side MOSFET, Eco-mode™ pulse-skipping control, 116-μA no-load quiescent current, and adjustable 100-kHz–2.5-MHz switching frequency - used in aerospace power rails requiring stable 3.3-V or 5-V outputs from 12-V/24-V bus.

For engineers reviewing the TPS57140-EP datasheet, TPS57140-EP pinout, TPS57140-EP application, or TPS57140-EP equivalent, key selection considerations include military-grade temperature range (–55°C to 125°C), open-drain PWRGD with 92–109% output voltage window, RT/CLK synchronization capability, and BOOT-PH UVLO protection for high-duty-cycle operation.

Technical Context

This current-mode buck regulator implements fixed-frequency PWM with slope compensation to prevent subharmonic oscillation across full duty-cycle range. Its transconductance error amplifier (97 μS typical) drives the COMP pin for external Type-II/III compensation, while the internal PLL on RT/CLK enables precise synchronization to external clocks or resistor-set frequency tuning.

The device integrates boot recharge diode and supports 100% duty cycle as long as BOOT–PH ≥2.1 V; below that threshold, high-side MOSFET disables to allow low-side conduction and capacitor refresh. Power-good logic asserts PWRGD low when VSENSE falls outside 94–107% of nominal regulation, enabling system sequencing and fault monitoring.

Key Specifications

Pinout & Package

TPS57140-EP is housed in a thermally enhanced 10-pin VSON package (3.00 mm × 3.00 mm) with exposed thermal pad tied to GND for optimal heat dissipation in high-reliability PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with LM5140-Q1 and TPS54160A-EP, TPS57140-EP uniquely combines integrated 200-mΩ FET, military-grade temperature range, PWRGD with tight voltage window, and Eco-mode efficiency - making it optimal for compact, high-reliability POL applications where board space and thermal management are constrained.

Availability

TPS57140-EP is available at Aetrix Electronics and suitable for aerospace power distribution, satellite payload regulation, defense vehicle electronics, medical spaceflight systems, and avionics computing requiring stable component supply under extended temperature and radiation constraints.

Supply support for TPS57140-EP 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 for industrial, automotive, aerospace, and medical markets.

The TPS57140-EP belongs to TI's Enhanced Product (EP) family - engineered for defense, aerospace, and critical infrastructure applications with controlled baselines, extended temperature operation, and full traceability.

FAQ

What is the maximum input voltage rating for the TPS57140-EP?

The TPS57140-EP has an absolute maximum input voltage rating of 47 V on the VIN pin, with recommended operating range from 3.5 V to 42 V. This allows robust operation during automotive load-dump events and industrial transient surges while maintaining regulation down to 3.5 V for cold-crank scenarios. The 42-V upper limit ensures compatibility with 24-V and 36-V battery systems common in aerospace and defense platforms.

Does the TPS57140-EP support external clock synchronization?

Yes, the TPS57140-EP supports external clock synchronization via the RT/CLK pin. When pulled above 2.2 V, the internal timing amplifier disables and the pin becomes a high-impedance clock input to the internal PLL. It accepts external clock signals from 300 kHz to 2.2 MHz, enabling deterministic switching alignment across multiple converters in noise-sensitive systems like phased-array radars or synchronized sensor arrays.

How does the TPS57140-EP achieve high efficiency at light loads?

The TPS57140-EP achieves high light-load efficiency through its Eco-mode™ pulse-skipping control scheme, which reduces no-load quiescent current to 116 μA. In this mode, the controller skips switching cycles when output current demand falls below a threshold, maintaining regulation while minimizing switching losses. This behavior is especially valuable in always-on telemetry circuits and dormant satellite subsystems where standby power budget is tightly constrained.

What is the purpose of the BOOT–PH UVLO circuit in the TPS57140-EP?

The BOOT–PH UVLO circuit monitors the bootstrap capacitor voltage and disables the high-side MOSFET when BOOT–PH drops below 2.1 V. This prevents insufficient gate drive and ensures reliable boot capacitor recharge via the internal diode and low-side conduction path. It enables stable 100% duty-cycle operation during dropout and extends usable input–output differential in high-duty-cycle applications such as 5-V output from 5.5-V input.

Can the TPS57140-EP be used in systems requiring power-good signaling with tight voltage tolerance?

Yes, the TPS57140-EP features an open-drain PWRGD pin that asserts low when VSENSE falls outside 94–107% of nominal output voltage, corresponding to a total window of 92–109% of nominal for deassertion and assertion edges. This tight, asymmetric window enables precise system-level power sequencing and fault detection in mission-critical avionics and medical spaceflight hardware where false resets must be avoided.