The ISL68137 is a digital dual output, flexible multiphase

(X+Y ≤ 7) PWM controller with AVSBus (Adaptive Voltage

Scaling interface). The ISL68137 can be configured to support

any desired phase assignments up to a maximum of 7 phases

across the 2 outputs (X+Y). For example, 6+1, 5+2, 4+2, 3+3,

3+2, or even a single output operation as a 7+0 configuration

are supported. The flexible phase arrangement, combined with

PMBus and AVSBus interfaces, allows the device to support

any demanding power supply requirement. The ISL68137 with

AVSBus complements PMBus by providing a common

interface that accelerates point-to-point communication

between the controller and the load to statically and

dynamically control the processor voltage, thus delivering a

balanced and power efficient solution. AVSBus can be used

exclusively once the device is configured via PMBus. The

ISL68137 utilizes Intersil’s proprietary linear synthetic digital

current modulation scheme to achieve the industry’s best

combination of transient response and ease of tuning while

addressing the challenges of modern multiphase designs.

Device configuration and telemetry monitoring is

accomplished using Intersil's intuitive PowerNavigator™ GUI.

The ISL68137 device supports on-chip nonvolatile memory to

store various configuration settings that are user selectable via

pin-strap, giving system designers increased power density to

configure and deploy multiple configurations. The device

supports an automatic phase add/drop feature to allow

maximum efficiency across all load ranges. Thresholds for

automatic phase add/drop are user programmable using the

powerful PowerNavigator™ GUI.

The ISL68137 supports a comprehensive fault management

system to enable the design of highly reliable systems. From a

multitiered overcurrent protection scheme, to the configurable

power-good and output overvoltage/undervoltage fault

thresholds and temperature monitoring, virtually any need is

accommodated.

With minimal external components, easy configuration, robust

fault management and highly accurate regulation capability,

implementing a high performance multiphase regulator has

never been easier.

Features

• PMBus 1.3 and AVSBus compliant

- Telemetry - VIN, VOUT, IOUT, power IN/OUT, temperature

and various fault status registers

- Individual AVSBus interface enables high speed voltage

changes

• Advanced linear digital modulation scheme

- Zero latency synthetic current control for excellent HF

current balance

- Dual edge modulation for fastest transient response

• Auto phase add/drop for excellent load vs efficiency profile

• Flexible phase configuration

- 7+0, 6+1, 5+2, 4+3 phase operation

- Operation using less than 7 phases between 2 outputs is

also supported

• Diode braking for overshoot reduction

• Differential remote voltage sensing supports ±0.5 closed

loop system accuracy over load, line and temperature

• Highly accurate current sensing for excellent load line

regulation and accurate OCP

- Supports ISL99227 60A smart power stages

- Supports DCR sense with integrated temperature

compensation

• Supports phase doubler (ISL6617A) for up to 14-phase

operation

• Comprehensive fault management enables high reliability

systems

- Pulse-by-pulse phase current limiting

- Total output current protection

- Output and input OV/UV

- Open voltage sense detect

- Black box recording capability for faults

• Intuitive configuration via PowerNavigator™ GUI

- NVM to store up to 8 configurations

• Pb-free (RoHS compliant)

Applications

• Networking equipment

• Telecom/datacom equipment

• Server/storage equipment

• Point-of-load power supply (Memory, DSP, ASIC, FPGA)