Texas Instruments TPS54372QPWPRQ1

Overview

TPS54372QPWPRQ1 from Texas Instruments is an automotive-grade 3-A synchronous buck PWM converter with integrated high- and low-side MOSFETs (60 mΩ typical), tracking/termination capability for DDR memory, adjustable switching frequency (280–700 kHz), and internal VBIAS regulator. It operates from 3 V to 6 V input and delivers precise output voltage tracking of external reference (0.2 V–1.75 V) in applications such as DDR VTT termination.

For engineers reviewing the TPS54372QPWPRQ1 datasheet, TPS54372QPWPRQ1 pinout, TPS54372QPWPRQ1 application, or TPS54372QPWPRQ1 equivalent, key selection considerations include its Q1 automotive qualification (−40°C to 125°C), 20-pin HTSSOP PowerPAD™ package with thermal vias, current-limit protection (4–7.5 A), and dual-source/sink capability for active termination.

Technical Context

The TPS54372QPWPRQ1 implements a voltage-mode synchronous buck architecture with adaptive dead-time control, cycle-by-cycle overcurrent protection via high-side current sensing, and a high-bandwidth error amplifier (90–110 dB open-loop gain, 3–5 MHz unity-gain bandwidth). Its PWM comparator features 70–85 ns propagation delay and 100 ns leading-edge blanking to suppress turn-on transients.

It integrates a 2.7–2.95 V internal bias regulator (VBIAS), under-voltage lockout (UVLO start at 2.95 V, hysteresis 115 mV), and programmable slow-start (2.6–4.1 ms). The device supports both fixed-frequency (350 kHz) and resistor-adjusted operation (RT pin), with oscillator frequency stability across −40°C to 125°C junction temperature.

Key Specifications

Pinout & Package

The TPS54372QPWPRQ1 is housed in a thermally enhanced 20-pin HTSSOP (PWP) PowerPAD™ package measuring 6.4 mm × 6.6 mm, with the exposed thermal pad soldered directly to AGND for optimal heat dissipation. Layout requires ≥10 thermal vias (6×0.013″ in pad, 4×0.018″ under package) and separate analog/power ground planes tied at the IC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54372QPWPRQ1, TPS54373QPWPRQ1 offers simplified layout via integrated soft-start capacitance, while LM26420QSQX/NOPB trades integration for dual-output flexibility - neither provides the same combination of 3-A bidirectional termination, automotive qualification, and single-chip simplicity.

Availability

TPS54372QPWPRQ1 is available at Aetrix Electronics and suitable for automotive ADAS modules, DDR memory subsystems, and high-speed logic termination requiring stable component supply with AEC-Q100 compliance and long-term production support.

Supply support for TPS54372QPWPRQ1 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 automotive qualification expertise.

The TPS54372-Q1 belongs to TI's SWIFT™ family of integrated dc/dc regulators, designed specifically for high-current, space-constrained automotive power applications requiring precision tracking, termination, and robust thermal performance.

FAQ

What is the maximum continuous output current capability of the TPS54372QPWPRQ1?

The TPS54372QPWPRQ1 delivers 3 A continuous output current in both sourcing and sinking modes. Its integrated 60-mΩ high-side and low-side MOSFETs enable bidirectional operation critical for DDR VTT termination. Peak current limit is 4–7.5 A depending on input voltage, and thermal shutdown activates above 135–165°C to protect against sustained overload. Derating applies above 70°C ambient per the dissipation ratings table.

How does the TPS54372QPWPRQ1 achieve DDR VTT tracking accuracy?

The TPS54372QPWPRQ1 achieves DDR VTT tracking accuracy by accepting an external reference voltage (0.2 V–1.75 V) on the REFIN pin - typically derived from half of VDDQ - and regulating its output to match that reference with <±1.5 mV load regulation error. Its high-bandwidth error amplifier (90–110 dB gain, 3–5 MHz GBW) and low-noise VBIAS regulator ensure tight tracking across temperature and load, meeting JEDEC specifications for DDR2/DDR3 termination.

Can the TPS54372QPWPRQ1 operate without an external frequency-setting resistor?

Yes, the TPS54372QPWPRQ1 operates at a default fixed switching frequency of 350 kHz when the RT pin is left floating (unconnected). This configuration eliminates the need for an external resistor and simplifies design for applications where EMI and efficiency trade-offs favor mid-range frequencies. For adjustable operation between 280 kHz and 700 kHz, a resistor (68 kΩ–180 kΩ) is connected from RT to AGND.

What thermal design guidelines apply to the TPS54372QPWPRQ1's PowerPAD package?

The TPS54372QPWPRQ1's 20-pin HTSSOP PowerPAD package requires direct soldering of the exposed thermal pad to AGND with ≥10 thermal vias (6×0.013″ in pad, 4×0.018″ under package). A minimum 3″×3″ 1-oz copper analog ground plane is recommended for full 3-A operation. Layout must separate analog and power ground planes, connecting them only at the IC, and route high-current PGND paths away from noise-sensitive AGND traces to prevent performance degradation.

Is the TPS54372QPWPRQ1 pin-compatible with other devices in the SWIFT family?

The TPS54372QPWPRQ1 shares the same 20-pin HTSSOP (PWP) package and core pinout with the TPS54373QPWPRQ1, making them mechanically and electrically pin-compatible. However, TPS54373QPWPRQ1 integrates the soft-start capacitor internally, so external C_SS is unnecessary. Other SWIFT devices like TPS54332QPWPRQ1 use different packages and pinouts - direct substitution requires verification of function, timing, and thermal behavior.