Texas Instruments CSD95379Q3MT

Overview

CSD95379Q3MT from Texas Instruments is a synchronous buck NexFET™ power stage integrating driver IC and dual MOSFETs in a single 3.3-mm × 3.3-mm SON package. It delivers up to 20 A continuous output current at 1.8 V with 92.5% system efficiency, supports 500 kHz–2 MHz switching, and features tri-state PWM input, diode emulation mode, and integrated bootstrap diode for high-density point-of-load regulation in ultrabooks and networking systems.

For engineers reviewing the CSD95379Q3MT datasheet, CSD95379Q3MT pinout, CSD95379Q3MT application, or CSD95379Q3MT equivalent, key selection criteria include its 20 A continuous rating, 1.8 W power loss at 12 A/1.8 V, ULQ/DCM/FCCM operating modes, 3.3-V/5-V PWM compatibility, and thermal performance validated up to 125°C junction temperature.

Technical Context

The CSD95379Q3MT implements a high-frequency synchronous buck topology with integrated gate driver, control FET, and sync FET. Its driver supports selectable conduction modes-FCCM (SKIP# high), DCM (SKIP# low), and ultra-low quiescent states (SKIP# or PWM tri-stated)-enabling Connected Standby compliance. The device uses adaptive zero-crossing detection and shoot-through protection to ensure safe switching transitions.

Thermal management relies on low-thermal-resistance paths: RθJB = 2.5°C/W and RθJC(top) = 22.8°C/W. System-level power loss is characterized across ambient temperature, airflow, input voltage, output inductance, and switching frequency-enabling accurate SOA prediction without discrete RDS(ON) or Qg extraction.

Key Specifications

Pinout & Package

Package: SON (Small Outline No-lead), 3.3 mm × 3.3 mm, 10-pin, plastic, exposed thermal pad. Optimized for low-inductance PCB layout and high-density placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CSD95379Q3MT, CSD95372Q5M offers greater current capacity in a larger package, while MP87653GQ trades external controller flexibility for monolithic simplicity and lower component count-making CSD95379Q3MT optimal for high-density, controller-based multiphase designs.

Availability

CSD95379Q3MT is available at Aetrix Electronics and suitable for ultrabook CPU core regulation, networking ASIC power delivery, and industrial FPGA supply applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for CSD95379Q3MT 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, embedded processing, and power management technologies, with over 90 years of innovation in high-reliability power solutions.

The CSD95379Q3MT belongs to TI's NexFET™ power stage product line, engineered specifically for high-efficiency, high-current point-of-load conversion in space-constrained computing and communications equipment.

FAQ

What is the maximum recommended junction temperature for continuous operation of the CSD95379Q3MT?

The CSD95379Q3MT is rated for continuous operation up to 125°C junction temperature, as validated by thermal testing per JEDEC JESD51 standards. Its RθJB of 2.5°C/W and SOA curves are specified at this limit, and derating is required above this temperature to maintain reliability and avoid thermal shutdown.

Does the CSD95379Q3MT require an external bootstrap diode?

No, the CSD95379Q3MT integrates a bootstrap diode internally between VDD and BOOT pins. Only a 0.1 µF ceramic capacitor between BOOT and BOOT_R is required-eliminating the need for an external diode and reducing layout complexity and BOM count.

How does the CSD95379Q3MT support Windows® 8 Connected Standby?

The CSD95379Q3MT supports Connected Standby via its ultra-low quiescent current mode: when SKIP# is tri-stated, supply current drops to 8 µA (typical), enabling microsecond-scale wake-up while meeting platform-level power budget targets for modern OS sleep states.

Can the CSD95379Q3MT operate with a 3.3-V PWM input signal?

Yes, the CSD95379Q3MT PWM input is compatible with both 3.3-V and 5-V logic levels. Its VIH threshold is 2.65 V and VIL is 0.6 V, with 0.2 V hysteresis-ensuring robust recognition of standard LVCMOS signals without level-shifting circuitry.

What is the purpose of the dual PGND pins (pins 4 and 11) on the CSD95379Q3MT?

The dual PGND pins provide separate low-impedance return paths for high-frequency switching currents (pin 4) and driver bias currents (pin 11), minimizing ground bounce and improving EMI performance. They must be connected together on the PCB using a wide, low-inductance copper pour beneath the package.