Texas Instruments TPS51604DSGR

Overview

TPS51604DSGR from Texas Instruments is a synchronous buck FET driver optimized for high-frequency CPU VCORE power delivery. It drives both high-side and low-side N-channel MOSFETs, features adaptive dead-time control (0–35 ns rising, 0–25 ns falling), integrated bootstrap switch (12–24 Ω R_DS(on)), and supports FCCM/DCM mode selection via SKIP pin. Used in ultrabook and tablet CPU core power stages with 4.5–28 V input and 5-V gate drive.

For engineers reviewing the TPS51604DSGR datasheet, TPS51604DSGR pinout, TPS51604DSGR application, or TPS51604DSGR equivalent, this page delivers verified electrical characteristics, thermal metrics (R_θJA = 63.1°C/W), tri-state timing (t_TSKR = 1 µs), zero-crossing offset (±2.25 mV), and WSON-8 package layout guidance - all critical for high-efficiency, high-frequency buck converter design.

Technical Context

The TPS51604DSGR implements adaptive dead-time control to minimize shoot-through risk while reducing body diode conduction losses; its DRVH rise/fall propagation delays are 40 ns and 25 ns respectively with 3.3 nF load. The integrated BST switch replaces external diodes, enabling efficient bootstrap capacitor charging using DRVL signal gating.

It supports three functional modes: FCCM (SKIP = HI), DCM (SKIP = LO with auto zero-crossing detection on SW pin), and very-low-power state (both PWM and SKIP tri-stated, I_CC = 8 µA). UVLO thresholds are 4.15 V (rising) and 3.7 V (falling) with 0.2 V hysteresis, ensuring robust startup under varying VDD conditions.

Key Specifications

Pinout & Package

TPS51604DSGR is housed in a thermally enhanced 2.00 mm × 2.00 mm, 8-pin WSON (DSG) package with exposed thermal pad tied to GND. The package supports –40°C to 105°C operation and is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS51604DSGR, TPS51605DSGR adds protection features at the cost of complexity, while ISL6322IRZ trades integration and ultra-low-power capability for higher-voltage flexibility - making TPS51604DSGR optimal for compact, battery-sensitive CPU core supplies.

Availability

TPS51604DSGR is available at Aetrix Electronics and suitable for ultrabook CPU core power, tablet high-frequency VCORE, and embedded NVDC systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS51604DSGR 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs and high-performance analog solutions.

The TPS51604DSGR belongs to TI's CPU core power driver product line, designed specifically for high-frequency, high-efficiency synchronous buck converters in portable computing platforms requiring minimal footprint and ultra-low quiescent current.

FAQ

What is the recommended input voltage range for the VDD pin of the TPS51604DSGR?

The TPS51604DSGR requires a VDD supply between 4.5 V and 5.5 V, with 5 V being the nominal operating voltage. A ceramic capacitor of at least 1 µF must be placed between VDD and GND for stable operation. Operation outside this range risks UVLO activation or damage, as absolute maximum VDD is 6 V.

How does the SKIP pin affect the operational mode of the TPS51604DSGR?

The SKIP pin selects between FCCM (SKIP = HI), DCM (SKIP = LO), and very-low-power mode (SKIP = tri-state). When LOW, the zero-crossing comparator activates to detect inductor current zero-crossing for DCM entry; when tri-stated, TPS51604DSGR draws only 8 µA and resumes switching within 50 µs upon voltage assertion.

What is the function of the SW pin on the TPS51604DSGR?

The SW pin serves two critical roles in the TPS51604DSGR: it acts as the return path for the high-side gate driver (DRVH), and functions as the zero-crossing sense input for adaptive DCM mode. Its ±2.25 mV offset enables precise detection of inductor current valley, triggering low-side FET turn-off at true zero current.

Can the TPS51604DSGR drive both 3.3-V and 5-V logic-level MOSFETs?

Yes, the TPS51604DSGR is optimized for 5-V gate drive and supports both 3.3-V and 5-V logic-level FETs. Its PWM input thresholds (VIH = 2.65 V, VIL = 0.6 V) accommodate standard logic families, and its DRVH/DRVL outputs deliver full 5-V swing with low source/sink resistance (0.5–8 Ω), ensuring fast, robust FET switching.

What thermal considerations apply to the TPS51604DSGR in high-power applications?

The TPS51604DSGR has R_θJA = 63.1°C/W in its WSON-8 package. For high-current applications, the exposed thermal pad must be soldered to a solid GND plane using multiple thermal vias. Layout must minimize SW and GND loop area to reduce EMI and switching losses that elevate junction temperature beyond the 105°C maximum rating.