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Texas Instruments CSD95491Q5MC
- Part No.:
- CSD95491Q5MC
- Manufacturer:
- Texas Instruments
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 12-PowerTFDFN
- Datasheet:
-
CSD95491Q5MC.pdf
- Description:
- IC HALF BRIDGE DRIVER 60A 12VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,380
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Product details
Overview
CSD95491Q5MC from Texas Instruments is a synchronous buck NexFET™ Smart Power Stage integrating high-side and low-side MOSFETs with gate driver, current sensing, and temperature monitoring 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 inputs, and features diode emulation mode for light-load efficiency-used in VR12.x/VR13.x CPU voltage regulators on server motherboards.
For engineers reviewing the CSD95491Q5MC datasheet, CSD95491Q5MC pinout, CSD95491Q5MC application, or CSD95491Q5MC equivalent, key selection criteria include its 60-A continuous current rating, 94.4% system efficiency at 30 A, thermally enhanced topside cooling, tri-state PWM compatibility, and integrated bootstrap switch-critical for high-density multiphase POL designs.
Technical Context
The CSD95491Q5MC implements a fully integrated synchronous buck power stage with monolithic driver-MOSFET co-packaging optimized for high-frequency, high-current DC-DC conversion. Its internal current sensing uses REF IN / IOUT differential pair with LSET resistor-based inductor calibration, while TAO provides analog temperature output with integrated ORing diode for multiphase thermal reporting.
It supports dual-mode operation via EN/FCCM pin: forced continuous conduction (FCCM) when high, diode emulation (DEM) when held in tri-state window, and full disable when low. The BOOT/BOOT_R pins integrate a bootstrap diode and support ≥0.1-µF ceramic capacitor for HS gate drive, with VSW referenced dead-time control to prevent shoot-through.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 60 A at VIN = 12 V, VOUT = 1.2 V, fSW = 500 kHz - enables single-phase support for high-end CPU core rails. |
| Peak Output Current | 90 A for tp = 50 µs - sustains transient load steps without saturation or thermal shutdown. |
| Switching Frequency | Up to 1250 kHz - allows smaller magnetics and faster transient response in space-constrained VRMs. |
| System Efficiency | 94.4% at 30 A, VOUT = 1.8 V, VIN = 12 V, fSW = 600 kHz - reduces power loss and thermal load in multi-phase stacks. |
| Operating Junction Temp | –40°C to +125°C - supports industrial and server-grade thermal environments without derating. |
| Input Voltage Range | VIN = 4.5 V to 16 V - compatible with 5 V, 12 V, and intermediate bus architectures. |
| PWM Compatibility | 3.3-V and 5-V logic-level input - interoperable with TI's TPS53679 and other VR controller families. |
Pinout & Package
VSON-CLIP (DMC) package, 5.0 mm × 6.0 mm footprint with exposed thermal pad; thermally enhanced topside cooling design requiring soldered thermal pad connection to PCB plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFIN | Current sense reference input | External precision voltage reference for bi-directional current sensing amplifier calibration. |
| IOUT | Current sense amplifier output | Differential output (vs. REFIN) proportional to phase current magnitude and direction. |
| LSET | Inductor value configuration | Resistor-to-PGND sets gain for internal current sensing circuitry based on actual inductor DCR. |
| VDD | Driver supply rail | 4.5–5.5 V supply powering gate drivers and internal logic; decoupling required near pin. |
| VOS | Voltage sense feedback | Connects to output rail for accurate voltage sensing in current-sense loop compensation. |
| SW | Switch node | Internal connection point between HS source and LS drain; connects directly to output inductor. |
| VIN | Main input supply | High-current input rail (4.5–16 V); requires local high-frequency ceramic capacitance. |
| BOOTR | Bootstrap return | Internal connection to VSW; completes bootstrap capacitor charging path for HS FET gate drive. |
| BOOT | Bootstrap capacitor terminal | Accepts ≥0.1-µF X5R ceramic cap; integrates bootstrap diode to eliminate external component. |
| PWM | Tri-state control input | Logic-controlled gate drive state: low = HS off/LS on, high = HS on/LS off, Hi-Z = both off after t3HT. |
| EN/FCCM | Enable / mode select | Configures FCCM (high), DEM (tri-state hold), or disable (low); internal pull-down if floating. |
| TAO/FLT | Temperature output / fault indicator | Analog voltage proportional to die temp; pulled to 3.3 V during thermal shutdown or HSS/LSOC fault. |
| PGND | Power ground return | High-current return path for MOSFET sources and driver circuits; must be low-inductance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap switch | Eliminates external bootstrap diode, reducing BOM count and layout area while improving reliability. |
| Temperature-compensated bi-directional current sense | Enables accurate phase current measurement across temperature and load, critical for current-balancing in multiphase systems. |
| Diode emulation function | Improves light-load efficiency by turning off LS FET during discontinuous conduction, reducing reverse recovery losses. |
| Optimized dead time for shoot-through protection | Internally tuned timing prevents simultaneous HS/LS conduction, eliminating need for external dead-time adjustment. |
| Ultra-low-inductance VSON-CLIP package | Minimizes parasitic loop inductance in high-dI/dt paths, reducing voltage overshoot and EMI generation. |
| Thermally enhanced topside cooling | Allows heat extraction through top surface of package, enabling higher power density in constrained board spaces. |
Applications
| Server CPU Core VRM | GPU Voltage Regulator Module |
|---|---|
Use Scenario: High-current, fast-transient regulation for Intel/AMD server CPUs operating under dynamic workloads. IC Role / Device Role / Timing Role: Synchronous buck power stage delivering regulated Vcore in multiphase VR12.x/VR13.x topology. Use Value: 60-A continuous rating and 94.4% efficiency at 30 A reduce thermal stress and improve power delivery margin in dense 1U chassis. |
Use Scenario: Compact, high-efficiency power stage for discrete graphics cards requiring rapid load-step response. IC Role / Device Role / Timing Role: Single-phase or paralleled phase in GPU VRM supporting PCIe Gen5+ power delivery profiles. Use Value: 1.25 MHz max switching frequency enables <150 nH inductors, shrinking solution size while maintaining <20 ns minimum on-time. |
| Network ASIC Power Delivery | AI Accelerator Board POL |
Use Scenario: Point-of-load regulation for high-performance networking SoCs with bursty traffic patterns. IC Role / Device Role / Timing Role: High-frequency buck stage in 4–6 phase interleaved configuration for 0.8–1.2 V output rails. Use Value: Integrated TAO pin ORing simplifies thermal monitoring across phases; diode emulation extends battery-backed runtime in edge switches. |
Use Scenario: Dedicated core voltage supply for AI inference accelerators requiring stable sub-1 V rails at >50 A. IC Role / Device Role / Timing Role: Smart power stage with analog current/voltage/temperature outputs feeding TI's TPS53679 controller. Use Value: Bi-directional current sense and LSET-based inductor calibration enable precise per-phase current balancing in heterogeneous compute modules. |
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 drive supply; otherwise identical pinout and specs. | Required when using split gate drive supplies (e.g., 5 V for logic, 12 V for HS gate); not drop-in for CSD95491Q5MC designs. | Select CSD95492QVM only if PVDD functionality is needed; CSD95491Q5MC remains optimal for single-rail VDD architectures. |
| ISL99227B | 60-A rated, 1.2 MHz capable, but lacks integrated bootstrap diode and analog temperature output (TAO). | Suitable for cost-sensitive designs where external bootstrap diode is acceptable and thermal monitoring is handled externally. | Choose ISL99227B when BOM cost reduction outweighs integration benefits; CSD95491Q5MC preferred for minimal external components and system-level telemetry. |
Compared with CSD95492QVM and ISL99227B, the CSD95491Q5MC offers superior integration-eliminating the bootstrap diode, providing analog temperature reporting, and maintaining identical 60-A/1.25-MHz performance-making it ideal for space- and telemetry-constrained server and AI hardware where layout simplicity and real-time thermal awareness are critical.
Availability
CSD95491Q5MC is available at Aetrix Electronics and suitable for server motherboard VRMs, GPU power modules, network ASIC POLs, and AI accelerator board designs requiring stable component supply and long-term lifecycle support.
Supply support for CSD95491Q5MC 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 CSD95491Q5MC belongs to TI's NexFET™ Smart Power Stage product line, engineered specifically for high-frequency, high-current synchronous buck converters in datacenter, telecom, and AI infrastructure applications.
FAQ
What is the maximum continuous output current rating for the CSD95491Q5MC?
The CSD95491Q5MC is rated for 60 A continuous output current under specified conditions: VIN = 12 V, VDD = 5 V, VOUT = 1.2 V, and switching frequency = 500 kHz. This rating assumes proper PCB thermal design with soldered exposed thermal pad and adequate airflow. Derating applies above +125°C junction temperature or with reduced copper area.
Does the CSD95491Q5MC support diode emulation mode, and how is it enabled?
Yes, the CSD95491Q5MC supports diode emulation mode (DEM) to improve light-load efficiency. It is enabled by holding the EN/FCCM pin in the tri-state voltage window (between VDD × 0.3 and VDD × 0.7) for longer than the tri-state hold-off time (t3HT). In DEM, the low-side FET turns off during discontinuous conduction, eliminating reverse recovery losses.
What is the purpose of the LSET pin on the CSD95491Q5MC?
The LSET pin on the CSD95491Q5MC connects to a resistor tied to PGND to calibrate the internal current-sensing circuitry for the specific output inductor's DCR value. This resistor sets the gain of the bi-directional current sense amplifier, ensuring accurate phase current measurement regardless of inductor tolerance or temperature drift.
Can the CSD95491Q5MC be used with 3.3-V PWM controllers?
Yes, the CSD95491Q5MC is explicitly designed for compatibility with both 3.3-V and 5-V PWM logic signals. Its PWM input accepts logic-high levels from 2.0 V to VDD + 0.3 V and logic-low levels from –0.3 V to 0.8 V, making it interoperable with TI's TPS53679, ISL68xx, and other industry-standard VR controllers without level-shifting.
How does the TAO pin function in multiphase configurations using multiple CSD95491Q5MC devices?
In multiphase systems, the TAO pins of multiple CSD95491Q5MC units are wired together with an external pull-up resistor. Due to the integrated ORing diode per device, only the highest die temperature among all phases pulls the shared TAO line low-enabling single-wire thermal monitoring of the hottest phase without additional analog multiplexing circuitry.
CSD95491Q5MC 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)
CSD95491Q5MC FAQ
1.How can I place an order for CSD95491Q5MC through Aetrix?
Please submit a Request for Quotation (RFQ) for CSD95491Q5MC 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 CSD95491Q5MC reliable?
The price and inventory of CSD95491Q5MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CSD95491Q5MC is usually 5 days.
3.What payment methods are accepted for CSD95491Q5MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CSD95491Q5MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CSD95491Q5MC?
CSD95491Q5MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CSD95491Q5MC 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 CSD95491Q5MC?
For technical support, including CSD95491Q5MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CSD95491Q5MC requirements.
6.How does Aetrix verify that CSD95491Q5MC is sourced from the original manufacturer or authorized distributors?
All CSD95491Q5MC 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 CSD95491Q5MC meets industry standards.
7.What is the process for return or replacement of CSD95491Q5MC?
All CSD95491Q5MC units undergo pre-shipment inspection (PSI). If there is an issue with CSD95491Q5MC, 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 CSD95491Q5MC part is unused and in its original packaging.
Return procedure for CSD95491Q5MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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