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Texas Instruments CSD95480RWJT
- Part No.:
- CSD95480RWJT
- Manufacturer:
- Texas Instruments
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 41-PowerTFQFN
- Datasheet:
-
CSD95480RWJT.pdf
- Description:
- IC HALF BRIDGE DRIVER 70A 41VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,413
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Product details
Overview
CSD95480RWJT from Texas Instruments is a synchronous buck NexFET™ Smart Power Stage integrating driver IC and dual MOSFETs in a single 5-mm × 6-mm VQFN-CLIP package, delivering 70-A continuous output current, >95% efficiency at 30 A, and operation up to 1.25 MHz for high-density VR12.x/VR13.x CPU core power delivery in servers and desktops.
For engineers reviewing the CSD95480RWJT datasheet, CSD95480RWJT pinout, CSD95480RWJT application, or CSD95480RWJT equivalent, key selection criteria include its integrated bi-directional current sense with temperature compensation, tri-state PWM compatibility (3.3 V/5 V), diode emulation mode, and thermally enhanced topside cooling for multiphase POL converters.
Technical Context
The CSD95480RWJT implements a fully integrated synchronous buck power stage with internal high-side and low-side NexFET™ MOSFETs driven by an embedded gate driver. It supports forced continuous conduction mode (FCCM) and diode emulation via the EN/FCCM pin, with dead-time optimization to prevent shoot-through.
Current sensing is achieved through analog differential amplification referenced to REFIN, with LSET resistor programming for inductor value calibration. Temperature monitoring is provided via the TAO/FLT pin, featuring integrated ORing diode for multiphase thermal reporting and thermal shutdown detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 70 A at VIN = 12 V, VDD = 5 V, PVDD = 5 V, VOUT = 1.2 V, fSW = 500 kHz - enables single-phase support for high-end CPU cores |
| Peak Output Current | 90 A for tp = 50 µs - sustains transient load demands without derating |
| Switching Frequency | Up to 1250 kHz - allows smaller external magnetics and faster transient response |
| Efficiency | >95% at 30 A - reduces system power loss and thermal load in dense server PCBs |
| Junction Temperature Range | –40°C to +125°C - supports operation in thermally constrained chassis environments |
| Thermal Resistance θJB | 2.2°C/W - enables effective heat transfer to PCB ground plane via exposed thermal pad |
| Input Voltage Range | 4.5 V to 16 V - compatible with 5 V, 12 V, and intermediate bus architectures |
Pinout & Package
The CSD95480RWJT uses a 41-pin VQFN-CLIP (RWJ) package with 5.0 mm × 6.0 mm footprint, thermally enhanced exposed metal pad on bottom, and optimized layout for low-inductance power loops and topside cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 25–30) | High-side MOSFET drain input | Accepts main DC input (4.5–16 V); requires local ceramic decoupling for high di/dt |
| VSW (Pins 10–19) | Phase node / HS source–LS drain connection | Drives output inductor; high dv/dt node requiring tight layout and guard ring |
| PGND (Pins 5, 7–9, 20–24, 40) | Power ground return | Multiple low-inductance paths to minimize ground bounce and improve EMI performance |
| PWM (Pin 34) | Tri-state gate control input | Logic-high enables HS-FET, logic-low enables LS-FET, Hi-Z triggers automatic shutdown after holdoff time |
| EN/FCCM (Pin 35) | Mode selection and enable | High = FCCM, floating/low = disable, tri-state window entry enables diode emulation for light-load efficiency |
| IOUT (Pin 38) | Current sense amplifier output | V(IOUT) – V(REFIN) ∝ phase current; enables accurate per-phase current monitoring in multiphase systems |
| TAO/FLT (Pin 36) | Temperature amplifier output / fault indicator | Analog voltage proportional to die temperature; pulled to 3.3 V during thermal shutdown; supports wired-OR in multi-phase |
| LSET (Pin 37) | Inductor value calibration | Resistor-to-PGND sets gain for current sense circuitry to match actual inductor DCR or value |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Switch | Eliminates external bootstrap diode and reduces component count while maintaining reliable HS gate drive |
| Temperature-Compensated Bi-Directional Current Sense | Enables accurate current measurement across load and temperature ranges without external calibration |
| Diode Emulation Function | Improves light-load efficiency by disabling LS-FET during off-time, reducing reverse conduction losses |
| Optimized Dead Time for Shoot-Through Protection | Prevents simultaneous conduction of HS and LS FETs, eliminating destructive shoot-through current |
| Thermally Enhanced Topside Cooling | Allows direct heatsink attachment or airflow over package top, increasing power density beyond bottom-side-only cooling |
Applications
| Server CPU Core VR | GPU Memory Power |
|---|---|
Use Scenario: High-current, fast-transient power delivery to Intel/AMD server CPUs operating under VR12.x/VR13.x specifications. IC Role / Device Role / Timing Role: Synchronous buck power stage providing regulated Vcore with precise current sensing and thermal monitoring. Use Value: Enables 70-A continuous operation per phase with <2.2°C/W thermal resistance, supporting multi-phase scalability and dynamic voltage/frequency scaling. | Use Scenario: Compact, high-efficiency power conversion for GDDR6/GDDR6X memory subsystems on AI accelerator cards. IC Role / Device Role / Timing Role: Single-phase POL converter delivering stable 1.35 V or 1.1 V at up to 70 A with minimal board area. Use Value: Achieves >95% efficiency at 30 A and operates up to 1.25 MHz, allowing ultra-small output inductors and reduced solution size. |
| Desktop High-End Motherboard VRM | AI Inference Accelerator POL |
Use Scenario: Multi-phase core power delivery on enthusiast-class desktop motherboards with aggressive thermal constraints. IC Role / Device Role / Timing Role: Smart power stage with integrated current and temperature sensing, synchronized via tri-state PWM to digital controller. Use Value: Reduces design complexity with analog current feedback and thermal reporting, enabling robust protection without external sensors. | Use Scenario: Distributed point-of-load regulation for FPGA-based inference accelerators requiring precise rail sequencing and telemetry. IC Role / Device Role / Timing Role: Digitally controlled power stage feeding 0.8–1.8 V rails with real-time IOUT and TAO outputs for system-level health monitoring. Use Value: Provides bi-directional current sense and analog temperature output for closed-loop thermal management and predictive failure analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck power stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CSD95492QVM | Same 41-pin VQFN-CLIP package, identical pinout, but rated for 60-A continuous current and lower RDS(on) on LS-FET | Suitable for cost-optimized or thermally relaxed 40–60 A designs; lacks same peak current headroom | Select CSD95492QVM when 60-A rating suffices and BOM cost reduction is prioritized over maximum transient capability |
| TPS53679 | Multi-phase controller IC (not power stage); requires external discrete MOSFETs or power stages; supports AVS, SMBus, and VR13.0 compliance | Used as master controller coordinating multiple CSD95480RWJT units; not a drop-in replacement | Choose TPS53679 only as system-level controller - it must be paired with CSD95480RWJT or similar power stages for full solution |
Compared with CSD95480RWJT, CSD95492QVM offers identical integration and footprint at lower current rating, while TPS53679 serves a complementary controller role rather than substituting the power stage - making CSD95480RWJT irreplaceable for high-current, space-constrained POL implementations requiring monolithic integration and thermal telemetry.
Availability
CSD95480RWJT is available at Aetrix Electronics and suitable for server VRMs, GPU power modules, high-end motherboard designs, and AI accelerator POL applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for CSD95480RWJT 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 leadership in high-efficiency power conversion solutions.
The CSD95480RWJT belongs to TI's NexFET™ Smart Power Stage product line, designed specifically for high-frequency, high-current synchronous buck conversion in computing and AI infrastructure where integration, thermal performance, and telemetry are critical.
FAQ
What is the maximum continuous output current rating for the CSD95480RWJT?
The CSD95480RWJT is rated for 70-A continuous output current under specified conditions: VIN = 12 V, VDD = 5 V, PVDD = 5 V, VOUT = 1.2 V, and switching frequency = 500 kHz. This rating assumes proper PCB thermal design with adequate copper area and airflow. Peak current capability reaches 90 A for short transients (50 µs), supporting demanding CPU/GPU load steps. Derating applies at higher ambient temperatures or reduced airflow.
Does the CSD95480RWJT support diode emulation mode, and how is it enabled?
Yes, the CSD95480RWJT supports diode emulation mode to improve light-load efficiency. It is enabled by driving the EN/FCCM pin into the tri-state voltage window (between logic-high and logic-low thresholds) and holding it there for longer than the internal tri-state holdoff time (T3HT). When active, the low-side FET is disabled during off-time to eliminate reverse conduction losses. The CSD95480RWJT exits diode emulation automatically upon detecting a valid PWM signal transition.
How does the current sensing architecture of the CSD95480RWJT work, and what external components are required?
The CSD95480RWJT uses a temperature-compensated bi-directional current sense amplifier with differential output at IOUT referenced to REFIN. A precision resistor from LSET to PGND calibrates gain for the specific inductor's DCR or value. REFIN accepts an external reference (typically 0.6 V or 1.0 V) to set current-sense offset. No external shunt is needed - sensing relies on MOSFET RDS(on) and internal amplification. Layout must minimize noise coupling to IOUT, REFIN, and VOS pins.
What thermal management features does the CSD95480RWJT provide, and how is temperature reported?
The CSD95480RWJT provides analog temperature reporting via the TAO/FLT pin, outputting a voltage linearly proportional to junction temperature. An integrated ORing diode allows multiple CSD95480RWJT units in multiphase configurations to share a single TAO line, with only the highest temperature reported. During thermal shutdown (LSOC or HSS detection), TAO is pulled to 3.3 V. The package also features thermally enhanced topside cooling and a low θJB of 2.2°C/W for efficient PCB conduction.
Is the CSD95480RWJT pin-compatible with other TI Smart Power Stages such as the CSD95492QVM?
Yes, the CSD95480RWJT is pin-compatible with the CSD95492QVM - both use the identical 41-pin VQFN-CLIP (RWJ) package with matching pin functions, assignments, and mechanical footprint. This allows direct substitution in existing layouts when 60-A continuous current suffices. However, CSD95480RWJT delivers higher current (70 A vs. 60 A) and different RDS(on) characteristics, so thermal and efficiency validation is recommended even with identical pinout.
CSD95480RWJT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- NexFET™
- Package/Case:
- 41-PowerTFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Half Bridge
- Applications:
- Synchronous Buck Converters
- Interface:
- PWM
- Load Type:
- Inductive, Capacitive
- Technology:
- Power MOSFET
- Rds On (Typ):
- -
- Current - Output / Channel:
- 70A
- Current - Peak Output:
- 90A
- Voltage - Supply:
- 4.5V ~ 5.5V
- Voltage - Load:
- 4.5V ~ 16V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Features:
- Bootstrap Circuit
- Fault Protection:
- Shoot-Through
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 41-VQFN-CLIP (5x6)
CSD95480RWJT FAQ
1.How can I place an order for CSD95480RWJT through Aetrix?
Please submit a Request for Quotation (RFQ) for CSD95480RWJT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CSD95480RWJT reliable?
The price and inventory of CSD95480RWJT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CSD95480RWJT is usually 5 days.
3.What payment methods are accepted for CSD95480RWJT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CSD95480RWJT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CSD95480RWJT?
CSD95480RWJT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CSD95480RWJT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CSD95480RWJT?
For technical support, including CSD95480RWJT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CSD95480RWJT requirements.
6.How does Aetrix verify that CSD95480RWJT is sourced from the original manufacturer or authorized distributors?
All CSD95480RWJT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CSD95480RWJT meets industry standards.
7.What is the process for return or replacement of CSD95480RWJT?
All CSD95480RWJT units undergo pre-shipment inspection (PSI). If there is an issue with CSD95480RWJT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CSD95480RWJT part is unused and in its original packaging.
Return procedure for CSD95480RWJT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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