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Analog Devices Inc./Maxim Integrated VT1697SBFQ
- Part No.:
- VT1697SBFQ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- 16-VFQFN
- Datasheet:
-
VT1697SBFQ.pdf
- Description:
- IC HALF BRIDGE DRIVER 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:576
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Product details
Overview
VT1697SBFQ from Maxim Integrated is a smart slave IC for multiphase synchronous buck voltage regulators, designed to operate with seventh-generation Maxim master controllers. It integrates high-side and low-side MOSFET drivers, lossless current sensing (±70A range), die temperature monitoring (0°C–150°C), and comprehensive fault protection including VX short, VDDH UVLO/OVLO, and overtemperature shutdown at 140°C–165°C. It enables 150A VR designs in <1600mm² footprint with top-side cooling.
For engineers reviewing the VT1697SBFQ datasheet, VT1697SBFQ pinout, VT1697SBFQ application, or VT1697SBFQ equivalent, this page delivers verified electrical specs (300kHz–1.3MHz switching, 59A–80A OCP clamp), thermal resistance (θJC = 0.42°C/W), SMBus-enabled per-phase reporting, and precise design context for microprocessor, GPU, and ASIC power delivery systems.
Technical Context
The VT1697SBFQ implements proprietary three-state PWM control (high/low/three-state) for phase shedding and diode emulation mode, enabling DCM operation and dynamic current steering across up to six parallel phases. Its integrated current reconstruction circuit delivers ratiometric analog ISENSE output referenced to VX, independent of inductor tolerance.
Thermal management relies on top-side exposed pad (electrically tied to VSS) and dual-path heat dissipation-through PCB and ambient airflow-supported by validated SOA curves for 200LFM/400LFM/no-airflow conditions. Protection logic includes latching OTP shutdown and non-latching UVLO/OVLO faults with ~37μs recovery upon fault removal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 300kHz–1.3MHz: Enables optimization between efficiency (lower fSW) and transient response/size (higher fSW) in VR12.0/VR12.5 systems. |
| Per-Phase Current Capability | 59A–80A peak positive OCP clamp: Supports high-density 150A+ regulators with fewer phases and reduced board area. |
| Junction Temp Range | –40°C to +125°C operating / +150°C absolute max: Ensures reliability in server CPU/GPU VRMs under sustained load and airflow constraints. |
| Thermal Resistance θJC | 0.42°C/W: Confirmed top-side cooling path enables lower junction temp vs. bottom-only QFN, critical for multi-phase thermal balancing. |
| Current Sense Accuracy | 95,000–105,000 A/A gain: Delivers precise lossless IL-to-ISENSE replication for accurate per-phase current reporting via SMBus. |
| Temperature Sensing | 3.01mV/°C gain, 832mV offset at 0°C: Provides linear analog TSENSE output to master for real-time die temp monitoring and thermal throttling. |
| VDDH Operating Range | 8.5V–14.0V: Matches standard 12V input rails while supporting wide VIN tolerance in enterprise/server power supplies. |
Pinout & Package
VT1697SBFQ uses a 16-pin FCQFN package (outline 21-0986, land pattern 90-0490) with exposed top-side thermal pad electrically connected to VSS. The package supports top-side cooling and requires strict decoupling: 0.22µF BST capacitor placed ≤40 mils from BST–VX, and HF VDDH caps adjacent to pins 1/6–9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDDH | High-side FET drain supply | Connects to 12V input rail; requires local HF decoupling to limit dv/dt-induced voltage spikes. |
| 2–5 VSS | Power ground return | Four dedicated ground pins minimize IR drop and improve current-sense accuracy in high-di/dt paths. |
| 6–9 VX | Switching node | Connects to inductor switch node; handles ±100A peak current and >10V/ns dv/dt-requires short, shielded routing. |
| 10 BST | Bootstrap supply input | Drives high-side gate; requires 0.22µF ceramic cap ≤40 mils from VX to sustain 1.3MHz operation. |
| 11 VCC | Gate-drive bias supply | 1.71V–1.98V rail powers level shifters/drivers; separate from VDD for noise isolation. |
| 12 VDD | Control logic supply | 1.71V–1.98V rail powers digital interface and protection circuits; filtered via 10Ω RFILTER. |
| 13 PWM | Phase-control input | Three-state logic (high/mid/low) enables phase shedding, DCM, and coupled-inductor mode coordination with master. |
| 14 GND | Analog ground reference | Single-point AGND connection near IC ensures stable ISENSE/TS_FAULT analog signal integrity. |
| 15 ISENSE | Reconstructed current output | Analog current signal proportional to VX current (±70A range); sent to master for per-phase current reporting. |
| 16 TS_FAULT | Temp/fault bidirectional pin | Outputs analog die temp under normal operation; pulls low to signal latching (OTP, VX short) or non-latching (UVLO/OVLO) faults. |
Key Features
| Feature | Design Value |
|---|---|
| Top-side thermal pad | Reduces θJA by enabling direct heat transfer to ambient airflow-validated in SOA plots for 200LFM/400LFM conditions. |
| Lossless current reconstruction | Eliminates sense resistor losses and tolerances; delivers 95k–105k A/A gain for accurate per-phase current reporting to master. |
| Three-state PWM interface | Enables dynamic phase shedding and DCM without external logic-reducing light-load power loss by disabling entire phases. |
| Coupled-inductor mode support | Proprietary control reduces circulating currents in inactive phases when using coupled inductors, improving system efficiency. |
| VX short detection | Detects local VX-to-VDDH or VX-to-GND shorts within nanoseconds and asserts TS_FAULT before catastrophic failure. |
Applications
| Microprocessor Power Delivery | Graphics Processing Unit (GPU) VRM |
|---|---|
Use Scenario: High-current, fast-transient power for 64-bit x86 or ARM-based CPUs in servers and workstations. IC Role / Device Role / Timing Role: Smart slave providing per-phase current/temperature telemetry and fault protection in a 4–6 phase VR12.5 regulator controlled by Maxim master IC. Use Value: Enables precise current steering for thermal balancing across phases and supports 150A+ loads in <1600mm² footprint using top-side cooling. | Use Scenario: Multi-phase voltage regulation for discrete GPUs requiring rapid load-step response and high efficiency at 0.8V–1.35V outputs. IC Role / Device Role / Timing Role: Per-phase power stage integrating drivers, current sensing, and OCP in a compact FCQFN for VR12.0/VR12.5 compliance. Use Value: Delivers 94%+ efficiency at 100A with 600kHz switching and supports DCM mode to reduce light-load losses below 10A. |
| Networking ASIC Power | Memory Subsystem Regulation |
Use Scenario: Powering high-speed networking ASICs (e.g., 100G/400G switches) with tight voltage tolerance and ripple requirements. IC Role / Device Role / Timing Role: Slave IC in a distributed multiphase architecture delivering accurate per-phase current reporting via SMBus for system-level telemetry. Use Value: Achieves <±1% current sharing error across phases and supports coupled-inductor mode to minimize losses during bursty traffic patterns. | Use Scenario: DDR4/DDR5 memory VDDQ or VPP regulation requiring low-noise, high-efficiency power with thermal monitoring. IC Role / Device Role / Timing Role: Compact smart slave managing single-phase or interleaved multi-phase conversion with integrated temperature sensing for memory controller thermal management. Use Value: Provides real-time die temperature feedback to master for dynamic frequency scaling and prevents thermal runaway during sustained memory bandwidth peaks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart slave IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VT1693SBFQ | Lower per-phase OCP clamp (45A–55A), 200kHz–1MHz fSW, no VX short detection. | Suitable for ≤100A VRMs with less aggressive thermal requirements; lacks top-side cooling optimization. | Select VT1693SBFQ only for cost-sensitive, lower-current designs where full VT1697SBFQ protection and thermal performance are unnecessary. |
| ISL95815IRZ | Intersil smart slave with 60A OCP, 300kHz–1.5MHz fSW, but no integrated top-side thermal pad or VX short protection. | Compatible with Renesas/Intersil masters; requires external thermal solution and lacks VT1697SBFQ's robust fault coverage. | Choose ISL95815IRZ only when interfacing with non-Maxim master controllers and accepting trade-offs in thermal path and fault detection scope. |
Compared with VT1697SBFQ, VT1693SBFQ offers reduced current capability and protection set, while ISL95815IRZ provides broader frequency range but lacks top-side cooling and VX short detection-making VT1697SBFQ the optimal choice for high-density, thermally constrained 150A+ VRMs requiring Maxim ecosystem integration.
Availability
VT1697SBFQ is available at Aetrix Electronics and suitable for high-current voltage regulators, microprocessor power delivery, graphics processing unit (GPU) VRMs, and networking ASIC power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for VT1697SBFQ 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.
The VT1697SBFQ belongs to Maxim's seventh-generation smart slave IC product line, engineered specifically for high-density, thermally optimized multiphase VRMs powering advanced microprocessors, GPUs, and ASICs in datacenter and enterprise systems.
FAQ
What is the primary function of the VT1697SBFQ in a multiphase voltage regulator?
The VT1697SBFQ serves as a smart slave IC that integrates high-side/low-side MOSFET drivers, lossless current sensing, die temperature monitoring, and comprehensive fault protection-including VX short, VDDH UVLO/OVLO, and overtemperature shutdown. It operates under command of a Maxim master IC to deliver precise per-phase control, current reporting via SMBus, and thermal-aware power delivery in high-current VRMs. The VT1697SBFQ enables compact 150A+ designs with top-side cooling and dynamic phase shedding.
Does the VT1697SBFQ support coupled inductors, and how does it improve efficiency?
Yes, the VT1697SBFQ supports coupled-inductor mode through proprietary three-state PWM signaling from the Maxim master IC. This mode minimizes circulating currents in inactive phases, reducing conduction losses and improving light-load efficiency. The VT1697SBFQ's integrated current reconstruction and phase-control logic ensure accurate current steering and thermal balancing across phases when using coupled inductors-validated in application circuits with CLB1108-4-50TR-R inductors.
What are the absolute maximum ratings for VX voltage and peak current on the VT1697SBFQ?
The VT1697SBFQ has an absolute maximum VX-to-VSS rating of –10V (AC) to +23V (DC), with peak VX current limited to ±100A. These ratings define safe operating boundaries during transients and fault conditions. The VT1697SBFQ's internal OCP circuit clamps sourcing current at 59A–80A and sinking current at –79.1A to –64.7A to protect against sustained overloads while maintaining system stability-verified in Electrical Characteristics tables and SOA plots.
How does the VT1697SBFQ implement temperature monitoring and overtemperature protection?
The VT1697SBFQ incorporates an on-die temperature sensor with 3.01mV/°C gain and 832mV offset at 0°C, outputting an analog voltage on the TS_FAULT pin for real-time die temperature reporting to the master IC. It also features overtemperature protection (OTP) with a rising threshold of 140°C–165°C; if exceeded, the VT1697SBFQ immediately shuts down and asserts TS_FAULT low to signal the master. Recovery requires power cycling due to latching behavior.
What PCB layout considerations are critical for reliable VT1697SBFQ operation?
Critical PCB layout practices for the VT1697SBFQ include placing all VDDH high-frequency capacitors ≤40 mils from pins 1/6–9 on the same PCB side, routing VX traces short and shielded with an adjacent ground plane to manage >10V/ns dv/dt, and connecting the top-side thermal pad to a large copper pour for airflow-assisted cooling. The VT1697SBFQ datasheet specifies 0.22µF BST capacitor placement ≤40 mils from BST–VX and recommends Gerber files from Maxim for validated reference layouts.
VT1697SBFQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-VFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Output Configuration:
- Half Bridge
- Applications:
- General Purpose
- Interface:
- PWM
- Load Type:
- Inductive
- Technology:
- Power MOSFET
- Rds On (Typ):
- -
- Current - Output / Channel:
- -
- Current - Peak Output:
- 55A
- Voltage - Supply:
- 1.71V ~ 1.98V
- Voltage - Load:
- 8.5V ~ 14V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Features:
- Diode Emulation, Status Flag
- Fault Protection:
- Current Limiting, Over Temperature, Short Circuit, UVLO
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (6x3.75)
VT1697SBFQ FAQ
1.How can I place an order for VT1697SBFQ through Aetrix?
Please submit a Request for Quotation (RFQ) for VT1697SBFQ 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 VT1697SBFQ reliable?
The price and inventory of VT1697SBFQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VT1697SBFQ is usually 5 days.
3.What payment methods are accepted for VT1697SBFQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VT1697SBFQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VT1697SBFQ?
VT1697SBFQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VT1697SBFQ 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 VT1697SBFQ?
For technical support, including VT1697SBFQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VT1697SBFQ requirements.
6.How does Aetrix verify that VT1697SBFQ is sourced from the original manufacturer or authorized distributors?
All VT1697SBFQ 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 VT1697SBFQ meets industry standards.
7.What is the process for return or replacement of VT1697SBFQ?
All VT1697SBFQ units undergo pre-shipment inspection (PSI). If there is an issue with VT1697SBFQ, 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 VT1697SBFQ part is unused and in its original packaging.
Return procedure for VT1697SBFQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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