DATASHEET
ISL68201 FN8696
Rev.4.00
Oct 17, 2017 Single-Phase R4 Digital Hybrid PWM Controller with PMBus/SMBus/I2C and PFM
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 (VIN, VOUT, IOUT, 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 serial 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, VOUT, R4 gain,
etc.) without the need for built-in NVM memory. This results in
a design flow that closely matches traditional analog …