Texas Instruments CSD22206WT

Overview

CSD22206WT from Texas Instruments is a –8-V, 4.7-mΩ P-channel NexFET™ power MOSFET in a 1.5-mm × 1.5-mm DSBGA package, optimized for ultra-low on-resistance and gate charge in space-constrained battery management systems. It delivers –5-A continuous drain current at 105°C, features gate-source voltage clamping, ESD protection, and operates with V_GS(th) = –0.7 V for reliable low-voltage turn-on in load switch applications.

For engineers reviewing the CSD22206WT datasheet, CSD22206WT pinout, CSD22206WT application, or CSD22206WT equivalent, key selection criteria include its 4.7-mΩ R_DS(on) at –4.5 V, 11.2-nC total gate charge, thermal resistance of 75°C/W on 1-in² Cu, and compatibility with compact 1.5-mm × 1.5-mm PCB footprints in portable electronics.

Technical Context

This P-channel MOSFET uses a trench-based silicon process to achieve ultra-low R_DS(on) while maintaining robust gate oxide integrity and controlled threshold voltage drift over temperature. Its DSBGA (YZF) package integrates three drain, five source, and one gate terminal in a 3×3 array, enabling high-current density with minimal parasitic inductance.

The device exhibits strong dynamic performance: Q_gd = 1.8 nC and Q_gs = 2.1 nC support fast switching with t_d(off) = 118 ns and t_f = 45 ns under –4.5-V drive, while C_iss = 2275 pF and C_oss = 1250 pF reflect optimized capacitance ratios for efficient hard-switching operation.

Key Specifications

Pinout & Package

Package: DSBGA (YZF), 9-ball 3×3 array, 0.31-mm diameter solder balls, 0.4-mm pitch, 0.62-mm max height. Land pattern per TI M0172-01.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN2011UFD-7 and Si2301DDS-T1-GE3, the CSD22206WT provides the lowest R_DS(on) in the smallest footprint, making it optimal for space- and efficiency-constrained battery systems where <50-mV dropout and <1.5-mm² area are mandatory.

Availability

CSD22206WT is available at Aetrix Electronics and suitable for battery protection circuits, USB-C power delivery switches, and medical wearable power path management requiring stable component supply and long-term lifecycle support.

Supply support for CSD22206WT 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 electronic components.

The CSD22206WT belongs to TI's NexFET™ power MOSFET product line, engineered specifically for ultra-low on-resistance and gate charge in battery-powered portable electronics and space-constrained power management applications.

FAQ

What is the maximum continuous drain current rating for CSD22206WT at 105°C ambient?

The CSD22206WT is rated for –5 A continuous drain current at an ambient temperature of 105°C when mounted on FR4 with 1-in² of 2-oz copper, per TI's SLPS689 datasheet Section 5.1. This rating reflects real-world thermal performance under defined PCB conditions, not just junction temperature limits. The CSD22206WT maintains this current capability while delivering only 4.7 mΩ R_DS(on) at –4.5 V, enabling efficient operation in thermally constrained designs.

Does CSD22206WT require an external gate resistor for typical load-switch applications?

No, the CSD22206WT does not require an external gate resistor in most load-switch applications due to its low 11.2-nC total gate charge and optimized internal gate resistance (R_G = 30 Ω). TI's characterization shows clean switching waveforms with <120 ns turn-off delay and 45 ns fall time using direct microcontroller GPIO drive. The CSD22206WT's gate-source voltage clamp further simplifies design by eliminating risk of gate overvoltage during transient events.

How does the DSBGA package of CSD22206WT impact PCB layout and thermal performance?

The CSD22206WT's 1.5-mm × 1.5-mm DSBGA (YZF) package uses nine 0.31-mm solder balls in a 3×3 array, enabling ultra-dense routing with no perimeter pins. Thermal performance depends critically on PCB copper area: R_θJA is 75°C/W with 1-in² 2-oz Cu but degrades to 230°C/W with minimum pad area. The CSD22206WT's five-source and three-drain terminals are designed to maximize current spreading into internal copper layers, making thermal vias under the package essential for sustained –5-A operation.

Is CSD22206WT suitable for reverse-polarity protection in 5-V systems?

Yes, the CSD22206WT is well-suited for reverse-polarity protection in 5-V systems. With a –8-V V_DS rating and –0.7-V typical V_GS(th), it fully enhances at –5 V gate drive and blocks reverse current with only 4.7-mΩ on-resistance. Its integrated gate-source voltage clamp protects against overshoot during plug/unplug events, and the –1-μA I_DSS leakage ensures minimal standby power loss. The CSD22206WT has been validated in such configurations per TI application note SLVA722.

What is the gate charge breakdown for CSD22206WT, and how does it affect switching efficiency?

The CSD22206WT has Q_g = 11.2 nC (total), Q_gd = 1.8 nC (gate-to-drain), and Q_gs = 2.1 nC (gate-to-source) at V_DS = –4 V and I_D = –2 A. This low Q_gd/Q_g ratio (16%) minimizes Miller plateau duration, enabling fast, predictable switching with reduced driver losses. In a 1-MHz load switch, the CSD22206WT's gate charge profile directly contributes to <100-μW driver power dissipation, making it ideal for high-frequency power path control. The CSD22206WT's Q_g value is measured and specified in TI's SLPS689 datasheet Figure 4.