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)