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Texas Instruments CSD97370AQ5M
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- Part No.:
- CSD97370AQ5M
- Manufacturer:
- Texas Instruments
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 22-PowerLFDFN
- Datasheet:
-
CSD97370AQ5M.pdf
- Description:
- IC HALF BRIDGE DRIVER 40A 22LSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,473
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Product details
Overview
CSD97370AQ5M from Texas Instruments is a synchronous buck NexFET™ power stage integrating gate driver IC and dual MOSFETs in a single 5-mm × 6-mm SON package. It delivers 90% system efficiency at 25A, supports input voltages up to 22V, operates at switching frequencies up to 2MHz, and achieves 2.8W power loss at 25A - optimized for high-density POL DC-DC converters in server VR12.x V-Core applications.
For engineers reviewing the CSD97370AQ5M datasheet, CSD97370AQ5M pinout, CSD97370AQ5M application, or CSD97370AQ5M equivalent, key selection considerations include its 22-pin SON thermal pad package, integrated bootstrap diode, 3-state PWM compatibility with 5V controllers, pre-bias start-up protection, and shoot-through prevention logic - all critical for stable high-current buck converter design.
Technical Context
The CSD97370AQ5M implements a fully integrated synchronous buck power stage architecture with an internal high-performance gate driver IC that minimizes dead-time and eliminates shoot-through via adaptive cross-conduction protection. Its Control FET and Sync FET are parametrically tuned for lowest RDS(on) and Qgd-driven losses under 5V gate drive conditions.
It features TTL-compatible ENABLE with 100kΩ internal pull-down, 3-state PWM input with 100ns hold-off time, integrated bootstrap diode, and UVLO with 3.6V POR and 3.4V falling threshold. Thermal management relies on a large ground-based thermal pad with RθJB = 2°C/W and RθJC = 20°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 22V - supports wide-input industrial and server rail requirements without external regulation. |
| Continuous Output Current | 40A at TJ = 125°C - enables high-current single-phase or multiphase interleaved designs. |
| Switching Frequency | 200kHz to 2MHz - allows compact magnetics and fast transient response in space-constrained systems. |
| Power Loss | 2.8W at 25A (VIN=12V, VOUT=1.2V, fSW=500kHz) - directly measurable system-level loss enabling accurate thermal budgeting. |
| Package | SON 5-mm × 6-mm, 22-pin with exposed thermal pad - provides low-inductance layout and superior board-level heat dissipation. |
| Gate Drive Compatibility | 5V PWM signal with 3-state support - ensures interoperability with standard VR11.x/VR12.x controllers without level-shifting. |
| Protection Features | Pre-bias start-up, shoot-through prevention, UVLO, and active gate pull-down - prevents inductor current reversal and cross-conduction damage. |
Pinout & Package
Package: SON 5-mm × 6-mm, 22-pin with exposed thermal pad (PGND-connected) and optimized PCB footprint per TI SLPS352A mechanical drawings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENABLE (Pin 1) | Enable control input | TTL-compatible logic input; internal 100kΩ pull-down ensures safe off-state if floating. |
| VDD (Pin 3) | Gate driver supply | 4.5–5.5V supply for internal logic and gate drivers; bypass with 1µF ceramic capacitor to PGND. |
| VIN (Pins 12–17) | Main input voltage connection | Six parallel VIN pins reduce conduction loss and improve current sharing; requires close placement of six 10µF ceramic caps. |
| VSW (Pins 6–11) | Switching node | Six parallel VSW pins connect to output inductor; minimized loop inductance critical for >10kV/µs dV/dt operation. |
| BOOT / BOOT_R (Pins 18–19) | Bootstrap circuit interface | Integrated bootstrap diode; 0.1µF ceramic cap between BOOT and BOOT_R supplies Control FET gate drive. |
| PWM (Pin 22) | 3-state PWM input | Accepts 5V logic; open/high-Z state forces both FET gates low after 100ns hold-off time - enables safe controller disable. |
| PGND (Pin 23) | Power ground reference | Primary thermal and current return path; connects directly to large copper area and thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| System-optimized PCB footprint | Reduces layout iteration time by providing validated land pattern, stencil design, and thermal via guidance in datasheet. |
| Integrated bootstrap diode | Eliminates external diode component and associated parasitic inductance, improving reliability and reducing BOM count. |
| Pre-bias start-up protection | Prevents negative inductor current during startup into pre-biased outputs - avoids core saturation and overcurrent stress. |
| Shoot-through protection | Adaptive timing logic ensures zero overlap between Control FET and Sync FET conduction, preventing destructive cross-current. |
| Universal 5V PWM compatibility | Supports direct interface with industry-standard VR11.x/VR12.x controllers without external level shifters or resistive dividers. |
Applications
| Server VR12.x V-Core Converter | Graphics Card POL Supply |
|---|---|
Use Scenario: High-current, fast-transient CPU core voltage regulation in dual-socket servers with VR12.x compliance. IC Role / Device Role / Timing Role: Primary synchronous buck power stage delivering up to 40A continuous current with <40ns minimum on-time support. Use Value: 90% efficiency at 25A reduces thermal load on dense motherboard layouts while maintaining VR12.x phase alignment and droop requirements. |
Use Scenario: Point-of-load regulation for GPU memory and core rails on PCIe graphics cards requiring rapid load-step response. IC Role / Device Role / Timing Role: High-frequency (up to 2MHz) buck stage enabling sub-1µH inductors and minimizing board area near GPU die. Use Value: Low 2.8W power loss at 25A and ultra-low package inductance enable stable operation under 100A/µs load transients without output voltage overshoot. |
| Desktop VR11.x Multiphase Module | Memory Module DDR4/DDR5 VPP Supply |
Use Scenario: Compact, multi-phase VR11.x compliant regulator on thin-profile desktop motherboards with strict height constraints. IC Role / Device Role / Timing Role: One phase of interleaved buck converter; synchronized via external PWM controller with 3-state shutdown capability. Use Value: 5-mm × 6-mm SON package enables tight phase spacing and reduced interconnect inductance - improving current sharing and EMI performance. |
Use Scenario: Dedicated 2.5V/1.8V VPP supply for DDR4/DDR5 memory modules requiring low-noise, high-efficiency regulation. IC Role / Device Role / Timing Role: Standalone buck stage operating at 1MHz+ to minimize filter size while meeting JEDEC VPP ripple specifications. Use Value: Integrated bootstrap diode and shoot-through protection ensure clean switching edge integrity, reducing conducted noise on memory reference planes. |
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 |
|---|---|---|---|
| CSD97374AQ5M | Higher RDS(on) (Control FET: 2.2mΩ vs 1.8mΩ), same 22-pin SON package and pinout. | Rated for 35A continuous (vs 40A); lower efficiency at high current but identical layout compatibility. | Select when thermal margin is sufficient and cost optimization is prioritized over peak efficiency. |
| ISL99227BIRZ | 40V max VIN rating (vs 22V), 30A continuous, 5mm × 6mm QFN with different pin assignment and no integrated bootstrap diode. | Supports higher input rails (e.g., 24V intermediate bus); requires external bootstrap diode and re-layout due to non-pin-compatible pinout. | Select for 24V-input systems where extended voltage range outweighs redesign effort and BOM increase. |
Compared with CSD97370AQ5M, CSD97374AQ5M offers drop-in replacement with minor efficiency trade-off, while ISL99227BIRZ extends voltage capability at the cost of layout change and added components - making CSD97370AQ5M optimal for 12V-input, high-density VR12.x designs.
Availability
CSD97370AQ5M is available at Aetrix Electronics and suitable for server VR12.x V-Core converters, graphics card POL supplies, and desktop VR11.x multiphase modules requiring stable component supply across long production cycles.
Supply support for CSD97370AQ5M 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 and embedded processing technologies, with leadership in power management ICs and high-performance silicon solutions.
The CSD97370AQ5M belongs to TI's NexFET™ Power Stage product line, designed specifically for high-efficiency, high-density synchronous buck conversion in computing and communications infrastructure where thermal performance and layout simplicity are critical.
FAQ
What is the maximum continuous output current rating for the CSD97370AQ5M?
The CSD97370AQ5M is rated for 40A continuous output current under recommended operating conditions (VIN = 12V, VDD = 5V, VOUT = 1.2V, fSW = 500kHz, LOUT = 0.3µH, TJ = 125°C). This rating assumes proper PCB thermal design with adequate copper area and thermal vias per TI's SLPS352A layout guidelines. At 25A, the device achieves 90% system efficiency and 2.8W total power loss.
Does the CSD97370AQ5M require an external bootstrap diode?
No, the CSD97370AQ5M integrates a bootstrap diode internally. The device only requires a 0.1µF ceramic capacitor connected between BOOT and BOOT_R pins to complete the bootstrap circuit for the Control FET gate drive. This integration eliminates external component count, reduces layout complexity, and improves reliability compared to discrete bootstrap solutions.
What protection features does the CSD97370AQ5M include to ensure robust operation?
The CSD97370AQ5M includes pre-bias start-up protection, adaptive shoot-through prevention, UVLO with 3.6V POR and 3.4V falling threshold, and active gate pull-down during disable states. These features collectively prevent negative inductor current, cross-conduction, uncontrolled startup into pre-biased rails, and latch-up during brown-out conditions - ensuring safe operation in demanding server and graphics applications.
Can the CSD97370AQ5M be used with 3.3V PWM controllers?
No - the CSD97370AQ5M PWM input is specified for 5V logic compatibility only, with VIH = 1.6–2.0V and VPWMH ≤ 4V. While the input thresholds may accept some 3.3V signals under ideal conditions, TI explicitly states in the datasheet that it accommodates "5V logic controllers" and revised the feature description to remove 3.3V support. For 3.3V controllers, a level shifter or alternative part such as CSD97394Q4M is required.
What is the thermal resistance from junction to board (RθJB) for the CSD97370AQ5M?
The CSD97370AQ5M has a typical RθJB of 2°C/W, measured from junction to the hottest point on the PCB within 1mm of the package edge. This low value is achieved through its exposed thermal pad tied directly to PGND and optimized via pattern design. Effective thermal performance requires at least 9 thermal vias (0.3mm drill, 0.5mm pad) under the pad, connected to inner-layer ground planes per TI's recommended layout in SLPS352A.
CSD97370AQ5M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- NexFET™
- Package/Case:
- 22-PowerLFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Half Bridge
- Applications:
- Synchronous Buck Converters
- Interface:
- PWM
- Load Type:
- Inductive
- Technology:
- Power MOSFET
- Rds On (Typ):
- -
- Current - Output / Channel:
- 40A
- Current - Peak Output:
- 60A
- Voltage - Supply:
- 4.5V ~ 5.5V
- Voltage - Load:
- 3.3V ~ 22V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Features:
- Bootstrap Circuit
- Fault Protection:
- Shoot-Through, UVLO
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 22-LSON-CLIP (6x5)
CSD97370AQ5M FAQ
1.How can I place an order for CSD97370AQ5M through Aetrix?
Please submit a Request for Quotation (RFQ) for CSD97370AQ5M 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 CSD97370AQ5M reliable?
The price and inventory of CSD97370AQ5M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CSD97370AQ5M is usually 5 days.
3.What payment methods are accepted for CSD97370AQ5M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CSD97370AQ5M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CSD97370AQ5M?
CSD97370AQ5M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CSD97370AQ5M 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 CSD97370AQ5M?
For technical support, including CSD97370AQ5M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CSD97370AQ5M requirements.
6.How does Aetrix verify that CSD97370AQ5M is sourced from the original manufacturer or authorized distributors?
All CSD97370AQ5M 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 CSD97370AQ5M meets industry standards.
7.What is the process for return or replacement of CSD97370AQ5M?
All CSD97370AQ5M units undergo pre-shipment inspection (PSI). If there is an issue with CSD97370AQ5M, 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 CSD97370AQ5M part is unused and in its original packaging.
Return procedure for CSD97370AQ5M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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