Texas Instruments CSD25201W15

Overview

CSD25201W15 from Texas Instruments is a P-channel NexFET™ power MOSFET in a 1.5-mm × 1.5-mm wafer-level package, rated for –20 V drain-to-source voltage, 4 A continuous drain current, and 33 mΩ R_DS(on) at V_GS = –4.5 V. It delivers low gate charge (4.3 nC) and ultra-low profile performance for space-constrained battery protection circuits.

For engineers reviewing the CSD25201W15 datasheet, CSD25201W15 pinout, CSD25201W15 application, or CSD25201W15 equivalent, key selection criteria include its –20 V rating, 33 mΩ on-resistance at –4.5 V, 1.5-mm × 1.5-mm WLP footprint, ESD-rated gate (–3 kV), and thermal resistance of 185°C/W with 1-inch² copper.

Technical Context

This device employs a trench-gate silicon process optimized for low R_DS(on) and fast switching in P-channel configuration. Its gate threshold voltage (–0.7 V typ.) enables robust turn-on with standard logic-level drive down to –1.8 V, while built-in gate-source clamp limits overvoltage stress.

Thermal performance is defined by two R_θJA values: 283°C/W on minimum FR4 pad area and 185°C/W on 1-inch² 2-oz copper - confirming design dependency on PCB layout. The 0.62-mm max height and solder-ball terminations support ultra-thin portable electronics integration.

Key Specifications

Pinout & Package

Package: 1.5-mm × 1.5-mm Wafer-Level Package (WLP) with 0.31-mm diameter solder balls, 0.62-mm max height, and MSL1 reflow compatibility (260°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel load switch applications.

Compared with DMG2305UX and Si2305DS, the CSD25201W15 provides superior power density (33 mΩ in 2.25 mm²), lower profile (0.62 mm), and integrated gate protection - making it the only option qualified for next-generation wearables and slim battery packs requiring <1 mm Z-height.

Availability

CSD25201W15 is available at Aetrix Electronics and suitable for battery protection, wearable load switching, and USB-C power path control requiring stable component supply across production ramps and long-lifecycle programs.

Supply support for CSD25201W15 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, serving industrial, automotive, and consumer markets since 1930.

The CSD25201W15 belongs to TI's NexFET™ P-channel power MOSFET product line, engineered specifically for ultra-compact, high-efficiency battery management and load-switching applications in portable electronics.

FAQ

What is the maximum continuous drain current rating for CSD25201W15?

The CSD25201W15 is rated for 4 A continuous drain current at T_A = 25°C with minimum copper footprint, and 4 A pulsed drain current. Derating is required above 25°C ambient per the R_θJA = 283°C/W curve; with 1-inch² 2-oz copper, it sustains 4 A up to ~50°C ambient before thermal limiting.

Does CSD25201W15 require an external gate resistor for stability?

The CSD25201W15 integrates a gate clamp resistor, and its internal series gate resistance is 26–35 Ω. An external gate resistor is optional and used only to fine-tune switching speed or damp ringing; typical designs use 0–10 Ω depending on drive strength and layout parasitics. No external resistor is required for basic functionality.

Can CSD25201W15 be used in a back-to-back configuration for bidirectional blocking?

Yes, the CSD25201W15 is commonly deployed in back-to-back P-channel configuration for true bidirectional blocking in USB-C and battery isolation applications. Its symmetric V_DS = –20 V rating and matched R_DS(on) ensure balanced forward and reverse conduction characteristics when paired with identical units.

What is the thermal resistance junction-to-ambient for CSD25201W15 on standard FR4?

The CSD25201W15 has R_θJA = 283°C/W when mounted on FR4 with minimum copper footprint, and R_θJA = 185°C/W when mounted on FR4 with 1-inch² (6.45 cm²) of 2-oz copper. These values define the thermal derating envelope and must be applied in thermal simulations for sustained current operation.

Is CSD25201W15 compatible with lead-free reflow processes?

Yes, the CSD25201W15 is Pb-free and RoHS-compliant, qualified for MSL1 moisture sensitivity level, and rated for peak reflow temperatures up to 260°C using both IR and convection methods - fully compatible with standard lead-free assembly processes.