Texas Instruments CSD17577Q5AT

Overview

CSD17577Q5AT from Texas Instruments is a 30-V N-channel NexFET™ power MOSFET in a VSONP (DQJ) 8-pin 5 mm × 6 mm package, optimized for high-efficiency synchronous buck converters. It delivers R_DS(on) = 3.5 mΩ at V_GS = 10 V and I_D = 18 A, Q_g = 13 nC (4.5 V), and avalanche-rated operation-enabling compact, high-current point-of-load regulation in telecom and computing systems.

For engineers reviewing the CSD17577Q5AT datasheet, CSD17577Q5AT pinout, CSD17577Q5AT application, or CSD17577Q5AT equivalent, key selection criteria include low gate charge for fast switching, thermal resistance R_θJC = 2.8°C/W for high-power density layouts, and SON 5×6 mm footprint compatibility with tight PCB space constraints.

Technical Context

This MOSFET employs a trench-gate silicon process to achieve low R_DS(on) and minimized Q_gd/Q_g ratio (2.8 nC / 13 nC), reducing switching losses in hard-switched topologies. Its V_GS(th) = 1.4 V (typ) enables robust gate drive margin with 4.5-V logic-level controllers.

The device features integrated body diode with Q_rr = 8.2 nC and t_rr = 9.3 ns, supporting efficient synchronous rectification. Thermal design is enabled by low R_θJC = 2.8°C/W and R_θJA = 50°C/W on standard 1-in² 2-oz Cu FR4, allowing direct thermal coupling to heatsink pads.

Key Specifications

Pinout & Package

VSONP (DQJ) 8-pin 5 mm × 6 mm plastic package with exposed thermal pad (pin 8). Package meets RoHS, halogen-free, and Pb-free terminal plating requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Compared with CSD17577Q5AT, BSC010N04LS6 trades higher gate charge and larger size for lower R_DS(on), while NTMFS5C673NL offers near-equivalent electrical behavior in the same SON 5×6 mm form factor-making it the preferred functional substitute for layout-constrained designs.

Availability

CSD17577Q5AT is available at Aetrix Electronics and suitable for point-of-load synchronous buck converters, telecom DC/DC modules, and industrial PLC power management requiring stable component supply and long-term production support.

Supply support for CSD17577Q5AT 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 ICs, with decades of leadership in high-performance power MOSFET technology.

The CSD17577Q5AT belongs to TI's NexFET™ power MOSFET product line, engineered specifically for high-frequency, high-efficiency DC/DC conversion in space-constrained networking, computing, and telecom infrastructure.

FAQ

What is the maximum continuous drain current for CSD17577Q5AT at 25°C case temperature?

The CSD17577Q5AT supports 83 A continuous drain current when limited by silicon capability at T_C = 25°C, as specified in its Absolute Maximum Ratings table. This rating assumes adequate PCB copper area and thermal management to maintain case temperature-actual usable current depends on layout, ambient conditions, and duty cycle.

Does CSD17577Q5AT require a gate resistor for stable operation in a 1-MHz synchronous buck converter?

The CSD17577Q5AT has low intrinsic gate resistance (R_G = 1.4–2.8 Ω) and benefits from an external gate resistor (typically 1–5 Ω) to damp ringing, control slew rate, and prevent shoot-through in high-speed synchronous buck topologies. TI's reference designs for similar NexFET™ devices confirm this practice improves EMI and reliability at >500 kHz.

Is CSD17577Q5AT pin-compatible with other 5 mm × 6 mm SON-packaged N-channel MOSFETs?

CSD17577Q5AT uses the industry-standard VSONP (DQJ) 8-pin 5 mm × 6 mm package with defined pinout (pins 1–4 = Source, 5 = Gate, 6–8 = Drain/thermal pad). While physical footprint matches many competitors' 5×6 mm SON devices, pin assignment must be verified individually-TI's CSD17577Q5AT pinout is not universally shared across vendors.

What is the recommended PCB copper area for achieving R_θJA = 50°C/W with CSD17577Q5AT?

To achieve the datasheet-specified R_θJA = 50°C/W, TI recommends mounting the CSD17577Q5AT on a 1-inch² (6.45 cm²) 2-oz copper pad on 0.06-inch FR4. The recommended stencil opening and land pattern (F1–F11 in SLPS516) ensure solder joint integrity and thermal transfer to this copper area.

Can CSD17577Q5AT be used as a replacement for CSD17577Q5A in production designs?

Yes-CSD17577Q5AT is the 250-unit 7-inch reel variant of the same die and package as CSD17577Q5A (2500-unit 13-inch reel). Electrical, thermal, and mechanical specifications are identical; only packaging and reel size differ. No design or layout changes are required when substituting CSD17577Q5AT for CSD17577Q5A.