Support software
LOAD-SWITCH-FET-LOSS-CALC — Power Loss Calculation Tool for Load Switch
Quickly trade off size, cost and performance to select the optimal MOSFET based on application conditions.
Data sheet
CSD19538Q3A
- Ultra-low Qg and Qgd
- Low-thermal resistance
- Avalanche rated
- Lead free
- RoHS compliant
- Halogen free
- SON 3.3mm × 3.3mm plastic package
This 100V, 49mΩ, SON 3.3mm × 3.3mm NexFET™ power MOSFET is designed to minimize conduction losses and reduce board footprint in PoE applications.
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Technical documentation
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View all 10 | Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | CSD19538Q3A 100V N-Channel NexFET™ Power MOSFET datasheet (Rev. B) | PDF | HTML | 30 Oct 2025 |
| Application brief | Estimating Leakage Currents of Power MOSFETs | PDF | HTML | 31 Oct 2025 | |
| Application note | MOSFET Support and Training Tools (Rev. G) | PDF | HTML | 27 Oct 2025 | |
| Application note | Designing an LED Driver for Medical Systems | PDF | HTML | 24 Feb 2025 | |
| Application note | Semiconductor and IC Package Thermal Metrics (Rev. D) | PDF | HTML | 25 Mar 2024 | |
| Application note | Using MOSFET Transient Thermal Impedance Curves In Your Design | PDF | HTML | 18 Dec 2023 | |
| Application note | QFN and SON PCB Attachment (Rev. C) | PDF | HTML | 06 Dec 2023 | |
| Application note | Using MOSFET Safe Operating Area Curves in Your Design | PDF | HTML | 13 Mar 2023 | |
| Application brief | Tips for Successfully Paralleling Power MOSFETs | PDF | HTML | 31 May 2022 | |
| Application note | Ringing Reduction Techniques for NexFET High Performance MOSFETs | 16 Nov 2011 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Support software
NONSYNC-BOOST-FET-LOSS-CALC — NONSYNC BOOST FET LOSS Calculator
MOSFET power loss calculator for non-synchronous boost converter
Supported products & hardware
Calculation tool
FET-SOA-CALC-SELECT — MOSFET SOA calculation and selection tool
Excel based FET SOA calculation and selection tool
Supported products & hardware
Calculation tool
MOTOR-DRIVE-FET-LOSS-CALC — Power Loss Calculation Tool for BLDC Motor Drive
This is an Excel-based MOSFET power loss calculator for brushless DC motor drive applications.
Supported products & hardware
Calculation tool
SLPR053 — Power Loss Calculation Tool for Synchronous Inverting Buck Boost Converter
MOSFET power loss calculation and selection tool for synchronous inverting buck boost converter
Supported products & hardware
Calculation tool
SYNC-BOOST-FET-LOSS-CALC — Power Loss Calculation Tool for Synchronous Boost Converter
MOSFET power loss calculator for synchronous boost converter applications.
Supported products & hardware
Calculation tool
SYNC-BUCK-FET-LOSS-CALC — Power Loss Calculation Tool for Synchronous Buck Converter
Quickly trade off size, cost and performance to select the optimal MOSFET based on application conditions.
Supported products & hardware
Calculation tool
SYNC-RECT-FET-LOSS-CALC — Power loss calculation tool for synchronous rectifier
MOSFET power loss calculator for synchronous rectifier applications
Reference designs
TIDA-010216 — 16s battery pack reference design with low-side MOSFET control for large capacity applications
This reference design is a low standby and ship-mode current consumption and high cell voltage accuracy 16s Lithium-ion (Li-ion) LiFePO4 battery pack. The design monitors each cell voltage, pack current, cell and MOSFET temperature with high accuracy and protects the Li-ion and LiFePO4 battery (...)
Design guide: PDF
Reference designs
PMP20859 — Dual-input redundant PoE PD with smooth transition reference design
This reference design implements an IEEE802.3bt (draft) Power over Ethernet (PoE) Powered Device (PD) with dual redundant inputs and a smooth transition between these inputs and an auxiliary input. The design consists of a 5V/6A synchronous flyback converter and allows for up to three (...)
Reference designs
TIDA-01426 — Reference Design for Line AC Voltage Generation From Low-Voltage DC Source for Sensor Excitation
This reference design demonstrates a method for designers to achieve high-voltage signals that can be used for flame detection using discrete components. The reference design is built with low BOM-cost and small solution size in mind. By using push-pull converter topology, it is possible to achieve (...)
Reference designs
PMP20588 — Fully Autonomous Single Port Type 2 (30W) PoE PSE Reference Design
The PMP20588 reference design utilizes the TPS23861 PSE controller to implement a single port Type 2 PoE PSE. An isolated flyback converter, utilizing the LM5022 current mode PWM controller, accepts a 12Vdc/24Vac input and provides a 55Vdc/600mA output source for the PSE. It is ideally (...)
Reference designs
TIDA-01227 — High Voltage Stepper Driver Reference Design
The TIDA-01227 reference design is a 15 V to 70 V stepper motor controller for bipolar applications. The design uses Texas Instrument’s DRV8711 Bipolar Stepper Motor Controller gate driver, CSD19538Q3A 100V, N-Channel NexFET Power MOSFET s, CSD17483F4 30V, N-Channel FemtoFET™ (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSONP (DNH) | 8 | Ultra Librarian |
Ordering & quality
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Information included:
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