VT1697SB Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Increased Power Density with Fewer External Components

VT1697SB
SMART SLAVE IC WITH INTEGRATED CURRENT
AND TEMPERATURE SENSORS
Device Type
VT1697SB
Operating
Current
55A Per Phase
Input Voltage
8.5V to 14.0V
The VT1697SB is a feature-rich smart slave IC designed to work
with Maxim’s seventh-generation masters to implement a high-
density multiphase voltage regulator. Up to six smart slave ICs,
plus a master IC, provide a compact synchronous buck converter
that includes accurate individual phase-current and temperature
reporting via SMBus/PMBus. This smart slave device includes
protection circuits for overtemperature, VX short, all power sup-
plies UVLO faults and main power supply OVLO fault. If a fault is
detected, the slave IC will immediately shut down and send a fault
signal to the master IC.
Monolithic integration and advanced packaging technologies allow
practical per-phase, high switching frequencies with significantly
lower losses than alternative implementations. Smart slave
devices are designed to support phase-shedding and DCM
modes for efficiency optimization over a wide range of load cur-
rents. High per-phase current-capability designs with low C_OUT
enable a design with fewer phases and a smaller footprint.
The VT1697SB is packaged in a QFN package with exposed top-
side thermal pads. Top-side cooling allows improved heat transfer
to ambient and reduces PC board and component temperatures.
FEATURES AND BENEFITS
• Increased Power Density with Fewer External Components
– Monolithic Integration For Reduced Parasitics
– 4-Phase Scalable Architecture Compatible with Coupled
Inductors
– 94% Peak Efficiency
– Top-Side Cooling For Improved Heat Transfer To Ambient
• Accurate Telemetry and Monitoring Provides Real-Time
Reporting of Critical Parameters
– PMBus Compliant Interface via Master Controller for Telemetry
and Power Management
– Junction Temperature Monitoring & Reporting
– Per-Phase Current Reporting
• Advanced Self-Protection Features Protects System and IC
– Overcurrent Protection
– Overtemperature Protection
– Boost Voltage UVLO
– VX Short Protection
APPLICATIONS
• Communication and Networking Equipment
• Servers and Storage Equipment
• High-Current Voltage Regulators
– Networking ASICs
– FPGAs
– Microprocessor Chipsets
– Memory
SVID
SMBus
I_SENSE1
I_SENSE2
I_SENSE3
Multiphase
Master
Control1
Control2
Control6
VT1697SB
T_SENSE1
T_SENSE2
VT1697SB
T_SENSE6
VT1697SB
V_OUT
Sense- Sense+
Figure 1: Basic Application Circuit
19-7030; Rev 4; 11/14
Maxim Integrated Products, Inc.
1