Texas Instruments CSD96370Q5M

Overview

CSD96370Q5M from Texas Instruments is a synchronous buck NexFET™ power stage integrating gate driver IC and dual MOSFETs in a single 5-mm × 6-mm SON package. It delivers 90% system efficiency at 25A, supports up to 2MHz switching, and operates with 3.3V/5V PWM inputs - optimized for high-density VR11.x/VR12 V-Core applications in server and desktop CPUs.

For engineers reviewing the CSD96370Q5M datasheet, CSD96370Q5M pinout, CSD96370Q5M application, or CSD96370Q5M equivalent, key selection criteria include its 2.6W power loss at 25A, 10kV/µs dV/dt capability, integrated bootstrap diode, pre-bias start-up protection, and shoot-through prevention logic.

Technical Context

The CSD96370Q5M implements a high-speed adaptive gate driver with <100ns PWM-to-VSW propagation delay and active shoot-through protection that prevents cross-conduction by ensuring dead-time between control and sync FET switching. Its internal logic enforces minimum 40ns PWM on-time and 100ns 3-state hold-off time.

It integrates an enhanced gate driver IC with >4A peak gate drive current, a built-in bootstrap diode, and UVLO monitoring (3.6V POR rising, 3.5V falling) with 250mV hysteresis. The device requires external VDD (4.5–5.5V), supports 3-state PWM input, and features active low ENABLE with 100kΩ internal pull-down.

Key Specifications

Pinout & Package

Package: SON 5-mm × 6-mm with exposed thermal pad (22-pin, top-side view). Thermal performance relies on PCB copper area and thermal vias connected to PGND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CSD96370Q5B and IR35203MTRPBF, the CSD96370Q5M offers superior integration (integrated bootstrap diode, pre-bias, and shoot-through logic) in a compact analog power stage form factor - ideal for VR11.x/VR12 systems where layout simplicity and analog controller compatibility are prioritized over digital telemetry.

Availability

CSD96370Q5M is available at Aetrix Electronics and suitable for desktop/server VR11.x/VR12 V-Core regulation, GPU memory POL conversion, and multiphase CPU power delivery requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for CSD96370Q5M 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 broad industrial, automotive, and computing market reach.

The CSD96370Q5M belongs to TI's NexFET™ Power Stage product line, engineered specifically for high-efficiency, high-frequency synchronous buck converters in CPU, GPU, and FPGA power delivery applications.

FAQ

What is the maximum continuous output current rating for the CSD96370Q5M?

The CSD96370Q5M is rated for 40A continuous output current under recommended operating conditions: VIN = 12V, VDD = 5V, VOUT = 1.2V, fSW = 500kHz, and LOUT = 0.3µH. This rating assumes proper PCB thermal design with adequate copper area and thermal vias to maintain junction temperature ≤125°C. Peak current capability reaches 60A for short durations (tp = 50µs).

Does the CSD96370Q5M require an external bootstrap diode?

No, the CSD96370Q5M integrates a bootstrap diode internally. It uses the BOOT and BOOT_R pins to connect a 0.1µF ceramic capacitor, eliminating the need for an external diode. This integration reduces component count, improves reliability, and simplifies layout - a key differentiator versus alternatives like the CSD96370Q5B, which requires an external bootstrap diode.

How does the CSD96370Q5M handle pre-biased output conditions during startup?

The CSD96370Q5M incorporates hardware-based pre-bias start-up protection. After power-on reset and ENABLE activation, both internal MOSFET gates remain actively held low until the first valid PWM high pulse meets the 40ns minimum on-time requirement. This prevents discharging of a pre-biased output rail and avoids large negative inductor currents - a critical feature for systems powering up into live backplanes or hot-swap environments.

What is the significance of the >10kV/µs dV/dt rating for the CSD96370Q5M?

The >10kV/µs dV/dt rating reflects the CSD96370Q5M's ability to withstand extremely fast voltage transients at the VSW node without false triggering or latch-up. This specification validates robust internal gate driver isolation and layout optimization - essential for stable operation in high-frequency, high-current synchronous buck converters where parasitic inductance can generate steep edges. It directly informs PCB layout requirements, especially input capacitor placement.

Can the CSD96370Q5M be used with 3.3V PWM controllers?

Yes, the CSD96370Q5M supports 3.3V PWM logic levels. Its PWM input thresholds are designed for compatibility with both 3.3V and 5V controllers: VIH = 1.6–2.0V and VIL = 0.8–1.0V, with 580mV hysteresis. The 3-state function also works reliably with 3.3V sources, provided the driving impedance stays within 220Ω/320Ω sink/source limits during active states.