Texas Instruments TPS51604QDSGTQ1

Overview

TPS51604QDSGTQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified synchronous buck MOSFET driver for automotive CPU core power, featuring adaptive zero-crossing detection, reduced dead-time control (0–35 ns rising, 0–25 ns falling), and dual low-power modes (130 µA in PWM tri-state, 8 µA in SKIP+PWM tri-state). It drives high-side and low-side N-channel FETs in high-frequency VCORE supplies up to 28 V input.

For engineers reviewing the TPS51604QDSGTQ1 datasheet, TPS51604QDSGTQ1 pinout, TPS51604QDSGTQ1 application, or TPS51604QDSGTQ1 equivalent, key selection criteria include bootstrap switch R_DS(on) (12–24 Ω), DRVH/DRVL gate drive strength (source/sink resistance ≤8 Ω / ≤1.6 Ω), UVLO thresholds (4.15 V rise, 3.7 V fall), and WSON-8 thermal-pad package compatibility with automotive thermal cycling requirements.

Technical Context

The TPS51604QDSGTQ1 implements adaptive dead-time control using DRVL-sensed timing to minimize shoot-through risk while enabling near-zero dead-time transitions-critical for >800 kHz operation in automotive VCORE rails. Its integrated BST FET replaces external diodes, optimizing bootstrap voltage regulation under dynamic load conditions.

Zero-crossing detection operates on the SW node with ±2.25 mV offset, enabling precise DCM entry/exit without external sensing components. The SKIP pin independently enables FCCM (SKIP=HI) or adaptive DCM (SKIP=LO), while simultaneous tri-state on PWM and SKIP forces ultra-low-power mode (8 µA) with <50 µs wake-up latency.

Key Specifications

Pinout & Package

TPS51604QDSGTQ1 uses a thermally enhanced 2.0 mm × 2.0 mm, 8-pin WSON (DSG) package with exposed thermal pad tied to GND. The package supports reflow per JEDEC Level-2-260°C-1 year and requires soldering the thermal pad for thermal performance and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS51604QDSGTQ1, TPS51604QDSGRQ1 offers identical performance in a larger reel format for production lines, while LM5113QDGSRQ1 trades automotive-optimized features (DCM, BST FET, ultra-low-power modes) for broader voltage range and higher drive current-making it unsuitable as a drop-in replacement but viable for non-automotive high-VIN applications.

Availability

TPS51604QDSGTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS processing units, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS51604QDSGTQ1 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 automotive-grade power management ICs, with over 50 years of innovation in high-reliability electronics.

The TPS51604-Q1 product line was designed specifically for high-frequency, high-efficiency CPU core power in automotive environments-emphasizing AEC-Q100 qualification, thermal resilience, and adaptive light-load optimization.

FAQ

What is the maximum input voltage rating for the TPS51604QDSGTQ1?

The TPS51604QDSGTQ1 has an absolute maximum BST input voltage of 35 V (transient <20 ns: 38 V) and a recommended operating VIN range of 4.5 V to 28 V. Exceeding 28 V during normal operation risks violating recommended conditions, though short transients up to 38 V on BST are tolerated per datasheet Section 6.1.

How does the TPS51604QDSGTQ1 achieve ultra-low quiescent current?

The TPS51604QDSGTQ1 achieves 8 µA quiescent current by placing both PWM and SKIP inputs into tri-state simultaneously, disabling internal logic and UVLO comparators. This ultra-low-power mode resumes switching within 50 µs of either input being driven, making it ideal for automotive sleep/wake architectures.

Is the TPS51604QDSGTQ1 pin-compatible with other TI gate drivers like the TPS51603?

No, the TPS51604QDSGTQ1 is not pin-compatible with the TPS51603. While both are 8-pin WSON buck drivers, the TPS51604QDSGTQ1 assigns SKIP to Pin 3 and PWM to Pin 2, whereas the TPS51603 uses different pin functions and lacks SKIP functionality. PCB layout and schematic must be redesigned for substitution.

What is the purpose of the thermal pad on the TPS51604QDSGTQ1 WSON package?

The exposed thermal pad on the TPS51604QDSGTQ1 WSON package must be soldered to the system GND plane using multiple vias. It serves dual roles: lowering junction-to-board thermal resistance (R_θJB = 34.3°C/W) for reliable 125°C operation and providing mechanical stability and low-inductance GND return for high-speed gate drive signals.

Does the TPS51604QDSGTQ1 require external components for bootstrap operation?

The TPS51604QDSGTQ1 integrates a bootstrap FET switch, eliminating the need for an external Schottky diode. However, a ceramic bootstrap capacitor (typically 0.1 µF) between BST and SW pins is mandatory, and a 1-µF or greater ceramic capacitor between VDD and GND is required for stable gate drive supply decoupling.