Maxim Integrated Products, Inc.

1

VT1697SB

SMART SLAVE IC WITH INTEGRATED CURRENT

AND TEMPERATURE SENSORS

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-

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.

Figure 1: Basic Application Circuit

FEATURES AND BENEFITS

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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

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Communication and Networking Equipment

•

Servers and Storage Equipment

•

High-Current Voltage Regulators

– Networking ASICs

– FPGAs

– Microprocessor Chipsets

– Memory

Device Type

Operating

Current

Input Voltage

VT1697SB

55A Per Phase

8.5V to 14.0V

Control1

I

I

I

V

OUT

Control2

Control6

Sense+

Sense-

T

T

T

SVID

SMBus

Multiphase

Master

VT1697SB

VT1697SB

VT1697SB