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Texas Instruments CSD95491Q5MCT
- Part No.:
- CSD95491Q5MCT
- Manufacturer:
- Texas Instruments
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 12-PowerTFDFN
- Datasheet:
-
CSD95491Q5MCT.pdf
- Description:
- IC HALF BRIDGE DRIVER 60A 12VSON
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
CSD95491Q5MCT from Texas Instruments is a synchronous buck NexFET™ Smart Power Stage integrating driver IC and dual power MOSFETs in a single VSON-CLIP package. It delivers 60-A continuous output current at up to 1.25 MHz switching frequency, supports 3.3-V/5-V PWM logic, and features integrated temperature-compensated bi-directional current sensing and analog temperature output for high-density VR12.x/VR13.x CPU core power delivery.
For engineers reviewing the CSD95491Q5MCT datasheet, CSD95491Q5MCT pinout, CSD95491Q5MCT application, or CSD95491Q5MCT equivalent, key selection criteria include its 60-A continuous current rating, 94.4% efficiency at 30 A, tri-state PWM input compatibility, diode emulation mode, and thermally enhanced 5-mm × 6-mm VSON-CLIP footprint optimized for multiphase POL designs.
Technical Context
The CSD95491Q5MCT implements a high-frequency synchronous buck power stage with integrated gate drivers, high-side and low-side NexFET™ MOSFETs, and precision current-sense amplifier. Its internal current sensing uses LSET resistor calibration and VOS/REFIN differential inputs to deliver temperature-compensated phase current measurement without external shunt resistors.
It supports dual-mode operation via EN/FCCM pin: forced continuous conduction mode (FCCM) when high, diode emulation mode (DEM) when held in tri-state window, and shutdown when low. The TAO pin provides analog voltage proportional to junction temperature, enabling system-level thermal monitoring and OR-ing across multiphase configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 60 A - Sustained DC load capability under recommended conditions (VIN = 12 V, VOUT = 1.2 V, fSW = 500 kHz). |
| Peak Output Current | 90 A - Short-duration surge current support (tp = 50 µs), enabling transient response headroom for CPU V-core loads. |
| Switching Frequency | Up to 1250 kHz - Enables compact magnetics and high-bandwidth control loops in space-constrained server/desktop VRMs. |
| System Efficiency | 94.4% at 30 A - Measured with VIN = 12 V, VOUT = 1.8 V, LOUT = 150 nH, fSW = 600 kHz, TA = 25°C. |
| Junction Temperature Range | –40°C to +125°C - Specifies operational thermal envelope for reliable performance in industrial and computing environments. |
| Input Voltage Range | 4.5 V to 16 V - Supports 5 V, 12 V, and intermediate bus architectures common in modern POL applications. |
| PWM Logic Compatibility | 3.3 V and 5 V - Ensures interoperability with standard digital controllers including TI's TPS53679 and other VR12.x-compliant ICs. |
Pinout & Package
VSON-CLIP (DMC) package: 5.00 mm × 6.00 mm outline, 12-pin exposed thermal pad, RoHS-exempt Sn lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap capacitor connection | Provides gate drive voltage for high-side FET; requires ≥0.1-µF X5R ceramic cap to BOOT_R. |
| BOOT_R | Bootstrap return path | Internally connected to VSW; completes bootstrap loop and enables integrated bootstrap diode operation. |
| VOS | Voltage sense for current amplifier | Connects to output inductor node; used with REFIN to generate differential signal proportional to phase current. |
| VSW | Switch node | Internal connection point between HS source and LS drain; ties directly to output inductor and must be routed with minimal parasitic inductance. |
| TAO/FLT | Temperature amplifier output / fault indicator | Outputs analog voltage ∝ junction temp; pulled to 3.3 V during thermal shutdown, LSOC, or HSS fault. |
| REFIN | Reference input for current sense amp | Establishes baseline for VOS–REFIN differential; sets current gain and zero-current offset of sensing circuitry. |
| IOUT | Current sense amplifier output | Voltage output where V(IOUT) – V(REFIN) ∝ phase current; enables closed-loop current monitoring without external shunt. |
| PGND | Power ground | Low-impedance return path for high-current switching paths; must be tied to exposed thermal pad for thermal and electrical integrity. |
| LSET | Inductor value calibration | Resistor-to-PGND sets internal gain for current sensing based on actual inductor DCR or value. |
| VDD | Driver supply | 4.5–5.5 V supply for gate drivers and internal logic; decoupling required per layout guidelines. |
| EN/FCCM | Enable / FCCM control | Tri-state pin: high = FCCM, floating/low = shutdown, tri-state hold = diode emulation mode. |
| PWM | Tri-state PWM input | Drives HS/LS gates: low = HS off/LS on, high = HS on/LS off, Hi-Z > t3HT = both off (safe shutdown). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated NexFET™ MOSFETs + driver | Eliminates discrete gate driver layout complexity and reduces PCB area by consolidating power stage into single 5×6 mm footprint. |
| Temperature-compensated current sense | Enables accurate real-time phase current measurement across –40°C to +125°C without external shunt or calibration. |
| Diode emulation function | Improves light-load efficiency in discontinuous conduction mode (DCM) by turning off LS FET during inductor freewheeling. |
| Thermally enhanced topside cooling | Exposed thermal pad and top-side copper thermal vias enable direct heatsink attachment or airflow cooling for sustained 60-A operation. |
| Optimized dead time control | Prevents shoot-through by dynamically adjusting HS/LS overlap timing, reducing switching losses and improving reliability. |
Applications
| Server CPU Core VRM | GPU Power Delivery |
|---|---|
Use Scenario: High-current, fast-transient power delivery to Intel/AMD server CPUs compliant with VR12.x/VR13.x specifications. IC Role / Device Role / Timing Role: Primary synchronous buck power stage in multiphase VRM, delivering up to 60 A per phase with <20 ns minimum on-time support. Use Value: Enables compact, high-efficiency 3+ phase designs meeting strict PSU efficiency and thermal targets for 1U/2U rack servers. |
Use Scenario: Point-of-load regulation for discrete graphics processing units requiring rapid current slew rates and tight voltage tolerance. IC Role / Device Role / Timing Role: High-frequency (up to 1.25 MHz) power stage supporting dynamic GPU voltage scaling (GFX VDD) and memory rail sequencing. Use Value: Delivers >94% efficiency at 30 A while maintaining stable output under 100 A/µs load transients typical in gaming and AI workloads. |
| Network ASIC Power | High-Density Storage Controller |
Use Scenario: Powering multi-core network processors and switch fabric ASICs in telecom and data center switches. IC Role / Device Role / Timing Role: Low-duty-cycle, high-peak-current power stage operating at 1 MHz+ to minimize inductor size and improve transient response. Use Value: Reduces total solution size by 30% vs. discrete solutions while maintaining <±1% output regulation under 50-A step loads. |
Use Scenario: Regulating NVMe SSD controller and DRAM buffers in enterprise storage enclosures with strict thermal budgets. IC Role / Device Role / Timing Role: POL converter supplying 1.2 V/1.8 V rails with integrated temperature monitoring for predictive thermal throttling. Use Value: Analog TAO output enables board-level thermal mapping without adding external sensors, simplifying firmware thermal management. |
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 | Includes PVDD pin for separate high-side gate driver supply; higher VIN max (20 V); identical pinout and current rating. | Targeted at higher-input-voltage systems (e.g., 19 V adapter inputs) where independent PVDD improves HS drive robustness. | Select CSD95492QVM when input exceeds 16 V or when enhanced HS gate drive stability under high dV/dt is required. |
| TPS53679 | Multi-phase controller IC (not power stage); supports up to 6 phases, SMBus/PMBus interface, VR13.0 compliance. | Used upstream to drive multiple CSD95491Q5MCT stages; provides full digital control, telemetry, and fault reporting. | TPS53679 pairs with CSD95491Q5MCT as controller + power stage in complete VR13.x solutions-complementary, not interchangeable. |
Compared with CSD95492QVM, the CSD95491Q5MCT offers lower system cost and simpler biasing for ≤16 V inputs, while retaining identical 60-A capability and thermal performance; versus TPS53679, it serves a fundamentally different role-as a power-switching component rather than a digital controller-making them functionally complementary in full VRM designs.
Availability
CSD95491Q5MCT is available at Aetrix Electronics and suitable for server CPU VRMs, GPU power delivery, and high-density network ASIC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and data center deployments.
Supply support for CSD95491Q5MCT 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 and automotive-grade reliability.
The CSD95491Q5MCT belongs to TI's NexFET™ Smart Power Stage product line, engineered specifically for high-current, high-frequency point-of-load regulation in CPU, GPU, and ASIC power delivery where density, efficiency, and thermal performance are critical.
FAQ
What is the maximum continuous output current rating for the CSD95491Q5MCT?
The CSD95491Q5MCT is rated for 60-A continuous output current under recommended operating conditions: VIN = 12 V, VDD = 5 V, VOUT = 1.2 V, and switching frequency = 500 kHz. This rating assumes proper PCB layout, thermal management via the exposed pad, and ambient temperature ≤25°C. Derating applies above 25°C ambient per the thermal characteristics in the datasheet.
Does the CSD95491Q5MCT support diode emulation mode, and how is it enabled?
Yes, the CSD95491Q5MCT supports diode emulation mode (DEM) to improve light-load efficiency. DEM is enabled by holding the EN/FCCM pin in its tri-state voltage window (between 0.8 V and 2.0 V) for longer than the specified tri-state hold-off time (t3HT). When active, DEM disables the low-side FET during inductor freewheeling, mimicking diode conduction and reducing switching losses.
How does the current sensing work on the CSD95491Q5MCT without an external shunt resistor?
The CSD95491Q5MCT implements integrated current sensing using the MOSFETs' intrinsic RDS(on) and temperature compensation. It measures the differential voltage between VOS and REFIN pins, then outputs a proportional analog voltage on IOUT. The LSET pin allows calibration to the actual inductor value or DCR, eliminating need for external shunts while maintaining ±3% accuracy across temperature and load.
What is the purpose of the TAO pin on the CSD95491Q5MCT, and how is it used in multiphase systems?
The TAO pin on the CSD95491Q5MCT provides an analog voltage output linearly proportional to junction temperature. In multiphase systems, multiple TAO pins can be wire-OR'd together using their integrated ORing diodes; only the highest temperature device pulls the shared line low, enabling centralized thermal monitoring with a single ADC input and simplifying firmware thermal management across all phases.
Is the CSD95491Q5MCT pin-compatible with the CSD95492QVM, and what are the key functional differences?
The CSD95491Q5MCT and CSD95492QVM share identical pinout, package (VSON-CLIP, 12-pin), and 60-A current rating, but differ in bias architecture: CSD95492QVM adds a dedicated PVDD pin for high-side gate driver supply, supporting higher VIN (up to 20 V) and improved noise immunity. CSD95491Q5MCT uses single VDD for both drivers and logic, making it optimal for ≤16 V input systems with simpler power sequencing.
CSD95491Q5MCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- NexFET™
- Package/Case:
- 12-PowerTFDFN
- 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:
- 60A
- 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:
- 12-VSON-CLIP (5x6)
CSD95491Q5MCT FAQ
1.How can I place an order for CSD95491Q5MCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CSD95491Q5MCT 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 CSD95491Q5MCT reliable?
The price and inventory of CSD95491Q5MCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CSD95491Q5MCT is usually 5 days.
3.What payment methods are accepted for CSD95491Q5MCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CSD95491Q5MCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CSD95491Q5MCT?
CSD95491Q5MCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CSD95491Q5MCT 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 CSD95491Q5MCT?
For technical support, including CSD95491Q5MCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CSD95491Q5MCT requirements.
6.How does Aetrix verify that CSD95491Q5MCT is sourced from the original manufacturer or authorized distributors?
All CSD95491Q5MCT 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 CSD95491Q5MCT meets industry standards.
7.What is the process for return or replacement of CSD95491Q5MCT?
All CSD95491Q5MCT units undergo pre-shipment inspection (PSI). If there is an issue with CSD95491Q5MCT, 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 CSD95491Q5MCT part is unused and in its original packaging.
Return procedure for CSD95491Q5MCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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