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Texas Instruments CSD95482RWJT
- Part No.:
- CSD95482RWJT
- Manufacturer:
- Texas Instruments
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 41-PowerTFQFN
- Datasheet:
-
CSD95482RWJT.pdf
- Description:
- IC HALF BRIDGE DRIVER 40A 41VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
CSD95482RWJT from Texas Instruments is a synchronous buck NexFET™ Smart Power Stage integrating driver IC and dual power MOSFETs in a single VQFN-CLIP package. It delivers 40-A continuous output current at up to 1.25 MHz switching frequency, supports 3.3-V/5-V PWM inputs, and features integrated bi-directional current sensing with temperature compensation for high-density VR12.x/VR13.x voltage regulator applications.
For engineers reviewing the CSD95482RWJT datasheet, CSD95482RWJT pinout, CSD95482RWJT application, or CSD95482RWJT equivalent, key selection criteria include its 40-A continuous current rating, 5-mm × 6-mm thermally enhanced QFN footprint, diode emulation mode, tri-state PWM interface, and system-level current/temperature monitoring capability.
Technical Context
The CSD95482RWJT implements a high-frequency synchronous buck power stage with integrated gate drivers, HS/LS MOSFETs, and analog sensing circuitry. Its architecture supports forced continuous conduction mode (FCCM) and diode emulation via EN/FCCM pin control, while the internal current sense uses LSET resistor calibration and REF-IN referenced differential amplification.
Thermal management is enabled by an analog temperature output (TAO/FLT) with built-in ORing diode for multiphase thermal reporting, and top-side cooling is optimized via exposed thermal pad soldered to PCB. The device operates across –40°C to +125°C junction temperature with 4.5–16-V input range and 1.2-V typical output configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 40 A at VIN = 12 V, VOUT = 1.2 V, fSW = 500 kHz - enables single-phase support for high-current CPU/GPU core rails |
| Switching Frequency | Up to 1250 kHz - allows compact magnetics and fast transient response in POL converters |
| Efficiency | Over 93.5% at 20 A - reduces thermal load and improves system power density |
| Input Voltage Range | 4.5 V to 16 V - compatible with 5-V, 12-V, and hybrid input bus architectures |
| PWM Compatibility | 3.3-V and 5-V logic levels - interoperable with TI's TPS53679 and other VR controller families |
| Package | VQFN-CLIP (RWJ), 41-pin, 5.0 mm × 6.0 mm - ultra-low inductance layout with top-side thermal pad for direct heatsink coupling |
| Current Sensing | Temperature-compensated bi-directional analog IOUT/REFIN output - eliminates external sense resistor and improves accuracy over temperature |
| Thermal Monitoring | Analog TAO/FLT output with integrated ORing diode - enables shared thermal bus in multi-phase VR designs |
Pinout & Package
VQFN-CLIP (RWJ) package with 41 terminals, 5.0 mm × 6.0 mm body, exposed thermal pad on underside, and top-side cooling capability. Pin 1 index located at top-left corner per JEDEC MO-220 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (25–30) | High-side MOSFET drain input | Connects to bulk input capacitors; multiple pins reduce parasitic inductance and improve current sharing |
| VSW (10–19) | Phase node (HS source / LS drain) | Direct connection point to output inductor; 10 parallel pins minimize switching node loop inductance |
| PGND (5, 7–9, 20–24, 40) | Power ground return | 22 dedicated PGND pins ensure low-impedance return path for high di/dt currents and reduce EMI |
| PWM (34) | Tri-state gate control input | Logic high → HS on/LS off; logic low → HS off/LS on; Hi-Z > T3HT → both FETs off for safety shutdown |
| EN/FCCM (35) | Mode selection & enable | High → FCCM; floating/low → disable; tri-state window → diode emulation mode for light-load efficiency |
| IOUT (38) / REFIN (39) | Differential current sense output | V(IOUT) – V(REFIN) ∝ phase current; enables accurate real-time current monitoring without shunt resistor |
| TAO/FLT (36) | Temperature amplifier output | Analog voltage proportional to die temperature; integrated ORing diode allows daisy-chained thermal reporting in multiphase |
| LSET (37) | Inductor value calibration | Resistor to PGND sets gain for internal current sense amplifier - matches specific inductor DCR and geometry |
| BOOT (33) / BOOTR (32) | Bootstrap supply path | Integrated bootstrap diode; 0.1-µF ceramic capacitor between BOOT and BOOTR supplies HS gate drive charge |
| VOS (1) | Output voltage sense | Connects to feedback network for internal current sense offset calibration - improves regulation accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Integrated NexFET™ MOSFETs + driver | Eliminates discrete driver/MOSFET layout complexity and timing mismatch; enables <20 ns dead time optimization |
| Diode emulation function | Extends light-load efficiency in discontinuous conduction mode without requiring external control logic |
| Bi-directional current sense with temp compensation | Enables precise phase current balancing and overcurrent protection across –40°C to +125°C without calibration drift |
| Tri-state PWM input with shutdown hold-off | Prevents shoot-through during controller reset or communication loss by forcing safe state after Hi-Z timeout |
| System-optimized PCB footprint | Minimizes high-frequency loop area for VIN–VSW–PGND paths, reducing EMI and improving EMC compliance |
| Top-side thermal pad with exposed metal | Supports direct thermal interface to heatsink or chassis - critical for sustained 40-A operation in confined spaces |
Applications
| Server VR12.x Core Rail | GPU Memory Power Delivery |
|---|---|
Use Scenario: High-current, fast-transient core voltage regulation for Intel/AMD server CPUs operating under dynamic workload. IC Role / Device Role / Timing Role: Synchronous buck power stage delivering 40-A continuous current with sub-100-ns response to load steps. Use Value: Enables single-phase implementation of VR12.x compliant core rail using TI's TPS53679 controller, reducing board area vs. multi-phase discrete solutions. | Use Scenario: Compact, high-efficiency power delivery to GDDR6 memory subsystems on AI accelerator cards. IC Role / Device Role / Timing Role: POL converter stage supporting 1.35-V/20-A operation with 1.25-MHz switching for minimal output capacitance. Use Value: Achieves >93% efficiency at 20 A while fitting within tight GPU card height constraints due to 5-mm × 6-mm footprint and top-side cooling. |
| Multiphase Desktop VR | High-Density Telecom POL |
Use Scenario: Dual-phase or triple-phase CPU voltage regulation in space-constrained desktop motherboards. IC Role / Device Role / Timing Role: Identical power stage used in parallel with synchronized PWM inputs and shared TAO thermal bus. Use Value: Simplifies phase interleaving design with matched propagation delay and integrated current/temperature telemetry per phase. | Use Scenario: Point-of-load conversion for FPGA I/O banks and SerDes supplies in 1U telecom servers. IC Role / Device Role / Timing Role: High-frequency (1 MHz+) buck stage delivering 12-V-to-1.8-V conversion with strict ripple and transient requirements. Use Value: Delivers stable 1.8-V output with <10-mV peak-to-peak ripple at 40-A load using only two 220-nH inductors and ceramic output caps. |
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 pinout, 60-A peak current rating, higher RDS(on) HS FET, identical sensing architecture | Better suited for transient-heavy loads requiring higher short-duration current headroom | Select CSD95492QVM when peak current exceeds 40 A but average remains ≤40 A; same PCB layout applies |
| TPS53679 | Controller IC (not power stage); requires external discrete MOSFETs or power stages like CSD95482RWJT | Used upstream to drive CSD95482RWJT; provides AVP, PMBus, and multi-phase synchronization | TPS53679 is complementary-not substitutable-but commonly paired with CSD95482RWJT in VR13.x reference designs |
Compared with CSD95482RWJT, CSD95492QVM offers higher peak current capability with identical footprint and interface, while TPS53679 serves as its system-level controller rather than a drop-in replacement-making CSD95482RWJT optimal for compact, self-contained high-current POL stages where integration and thermal performance are prioritized.
Availability
CSD95482RWJT is available at Aetrix Electronics and suitable for server VR12.x core rails, GPU memory power delivery, and high-density telecom POL applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CSD95482RWJT 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with over 90 years of innovation history.
The CSD95482RWJT belongs to TI's NexFET™ Smart Power Stage product line, engineered specifically for high-frequency, high-current synchronous buck conversion in CPU/GPU voltage regulator modules where integration, efficiency, and thermal performance are critical.
FAQ
What is the maximum continuous output current rating for the CSD95482RWJT?
The CSD95482RWJT is rated for 40-A continuous output current under specified conditions: VIN = 12 V, VDD = 5 V, PVDD = 5 V, VOUT = 1.2 V, and fSW = 500 kHz. This rating assumes proper PCB thermal design with the exposed thermal pad soldered to a solid copper plane. Peak current capability reaches 60 A for short durations (tp = 50 µs).
Does the CSD95482RWJT support diode emulation mode, and how is it enabled?
Yes, the CSD95482RWJT 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 VDD × 0.3 and VDD × 0.7) and holding it there for longer than the tri-state hold-off time (T3HT). When active, the low-side FET conducts during inductive freewheeling instead of allowing reverse body-diode conduction.
How does the current sensing work on the CSD95482RWJT, and what external components are required?
The CSD95482RWJT uses integrated temperature-compensated bi-directional current sensing. It outputs a differential analog signal at IOUT and REFIN pins, where V(IOUT) – V(REFIN) is proportional to phase current. An external resistor from LSET to PGND calibrates gain for the specific inductor DCR. No external sense resistor is needed, reducing BOM count and layout area.
What is the recommended bootstrap capacitor value for the CSD95482RWJT, and why is it critical?
Texas Instruments specifies a minimum 0.1-µF, 16-V, X5R ceramic capacitor between BOOT and BOOTR pins. This capacitor supplies gate charge for the high-side MOSFET during each switching cycle. Insufficient capacitance causes gate drive droop, increased HS RDS(on), excessive conduction loss, and potential thermal runaway-especially at high frequencies (>1 MHz) or high duty cycles.
Can the CSD95482RWJT be used in multiphase configurations, and how is thermal monitoring handled across phases?
Yes, the CSD95482RWJT is designed for multiphase operation. Its TAO/FLT pin includes an integrated ORing diode, allowing all TAO outputs from parallel phases to be tied together on a single wire. Only the highest die temperature among active phases is reported, simplifying system-level thermal management without external diodes or comparators.
CSD95482RWJT 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 (3)
- Applications:
- Synchronous Buck Converters
- Interface:
- PWM
- Load Type:
- Inductive, Capacitive
- Technology:
- Power MOSFET
- Rds On (Typ):
- -
- Current - Output / Channel:
- 40A
- Current - Peak Output:
- 60A
- 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)
CSD95482RWJT FAQ
1.How can I place an order for CSD95482RWJT through Aetrix?
Please submit a Request for Quotation (RFQ) for CSD95482RWJT 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 CSD95482RWJT reliable?
The price and inventory of CSD95482RWJT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CSD95482RWJT is usually 5 days.
3.What payment methods are accepted for CSD95482RWJT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CSD95482RWJT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CSD95482RWJT?
CSD95482RWJT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CSD95482RWJT 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 CSD95482RWJT?
For technical support, including CSD95482RWJT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CSD95482RWJT requirements.
6.How does Aetrix verify that CSD95482RWJT is sourced from the original manufacturer or authorized distributors?
All CSD95482RWJT 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 CSD95482RWJT meets industry standards.
7.What is the process for return or replacement of CSD95482RWJT?
All CSD95482RWJT units undergo pre-shipment inspection (PSI). If there is an issue with CSD95482RWJT, 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 CSD95482RWJT part is unused and in its original packaging.
Return procedure for CSD95482RWJT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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