ISL68201 Datasheet, PDF (1/32 Pages) Intersil Corporation – Single-Phase R4 Digital Hybrid PWM Controller

DATASHEET
Single-Phase R4™ Digital Hybrid PWM Controller with
PMBus/SMBus/I²C and PFM
ISL68201
The ISL68201 is a single-phase, synchronous buck PWM
controller featuring Intersil’s proprietary R4™ Technology. It
supports a wide 4.5V to 24V input voltage range and a wide
0.5V to 5.5V output range. Integrated LDOs provide controller
bias voltage, allowing for single supply operation. The
ISL68201 includes a PMBus/SMBus/I²C interface for device
configuration and telemetry (V_IN, V_OUT, I_OUT and temperature)
and fault reporting.
Intersil’s proprietary R4™ control scheme has extremely fast
transient performance, accurately regulated frequency control
and all internal compensation. An efficiency enhancing PFM
mode can be enabled to greatly improve light-load efficiency.
The ISL68201’s series bus allows for easy R4™ loop
optimization, resulting in fast transient performance over a
wide range of applications, including all ceramic output filters.
The ISL68201 has four 8-bit configuration pins, which provide
very flexible configuration options (frequency, V_OUT, R4™ gain,
etc.) without the need for built-in NVM memory. This results in
a design flow that closely matches traditional analog
controllers, while still offering the design flexibility and feature
set of a digital PMBus/SMBus/I²C interface. The ISL68201
also features remote voltage sensing and completely eliminates
any potential difference between remote and local grounds. This
improves regulation and protection accuracy. A precision enable
input is available to coordinate the start-up of the ISL68201 with
other voltage rails, especially useful for power sequencing.
Applications
• High efficiency and high density POL digital power
• FPGA, ASIC and memory supplies
• Data center: servers, storage systems
• Wired infrastructure: routers/switches/optical networking
• Wireless infrastructure: base station
Related Literature
• UG068, “ISL68201-99140DEMO1Z User Guide”
Features
• Intersil’s proprietary R4™ Technology
- Linear control loop for optimal transient response
- Variable frequency and duty cycle control during load
transient for fastest possible response
- Inherent voltage feed-forward for wide range input
• Input voltage range: 4.5V to 24V
• Output voltage range: 0.5V to 5.5V
• ±0.5% DAC accuracy with remote sense
• Support all ceramic solutions
• Integrated LDOs for single input rail solution
• SMBus/PMBus/I²C compatible, up to 1.25MHz
• 256 boot-up voltage levels with a configuration pin
• Eight switching frequency options from 300kHz to 1.5MHz
• PFM operation option, compatible with ISL99140 for
improved light-load efficiency
• Start-up into precharged load
• Precision enable input to set higher input UVLO and power
sequence as well as fault reset
• Power-good monitor for soft-start and fault detection
• Comprehensive fault protection for high system reliability
- Over-temperature protection
- Output overcurrent and short-circuit protection
- Output overvoltage and undervoltage protection
- Open remote sense protection
• Compatible with 5V or 3.3V PWM input DrMOS or Smart
Power Stage (SPS)
• Compatible with Intersil’s PowerNavigator™ software
PART
NUMBER
ISL68200
ISL68201
INTEGRATED
DRIVER
Yes
No
TABLE 1. SINGLE-PHASE R4™ DIGITAL HYBRID PWM CONTROLLER OPTIONS
PWM PMBus/SMBus/I²C
OUTPUT
INTERFACE
COMPATIBLE DEVICES
No
Yes
Discrete MOSFETs or Dual Channel MOSFETs
Yes
Yes
Intersil Power Stages:
ISL99140
Intersil Drivers:
ISL6596, ISL6609, ISL6627, ISL6622, ISL6208
March 7, 2016
FN8696.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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