Datasheet
ISL81807
80V Dual Synchronous Boost Controller Optimized to Drive E-mode GaN FET
The ISL81807 is a dual synchronous boost controller
that generates two independent outputs or one output
with two interleaved phases for a wide variety of
applications in industrial and general-purpose
segments. With a wide input and output voltage
ranges, the controller is suitable for
Features
▪ Wide input voltage range: 4.5V to 80V
▪ Wide output voltage range: 5V to 80V
▪ Gate drive voltage: 5.3V
▪ Four FET drivers
telecommunication, data center, and computing
applications.
▪ Constant output voltage and output current
feedback loop control
The ISL81807 provides a gate driver voltage of 5.3V.
With its small dead time setting, it is a perfect
controller for the E-mode GaN FET devices.
▪ Light-load efficiency enhancement
• Low ripple diode emulation and burst mode
operation
The ISL81807 uses peak current mode control with
phase interleaving for the two outputs. Each output
has a voltage regulator, current monitor, and average
current regulator to provide independent average
voltage and current control. The internal
Phase-Locked Loop (PLL) oscillator assures an
accurate frequency setting from 100kHz to 2MHz, and
the oscillator can be synchronized to an external
clock signal for frequency synchronization and phase
interleave paralleling applications. This PLL circuit
can output a phase-shift-programmable clock signal
that is used for multi-phase cascade synchronization
with required interleaving phase shift.
▪ Programmable soft-start
▪ Supports startup into pre-biased rails
▪ Programmable frequency: 100kHz to 2MHz
▪ Support current sharing with cascade phase
interleaving
▪ External clock sync
▪ Clock out with accurate phase angle controlled by
PLL or frequency dithering
▪ PGOOD indicator
▪ Input current monitor
▪ Selectable mode between PWM/DE/Burst
▪ Accurate EN/UVLO threshold: ±2%
▪ Low shutdown current: 5µA
The ISL81807 features programmable soft-start and
accurate threshold enable functions along with a
power-good indicator to simplify power supply rail
sequencing. It also provides full protection features
such as OVP, UVP, OTP, and average and peak
current limit on both outputs to ensure high reliability.
▪ Complete protection: OCP (pulse by pulse and
optional hiccup or constant current mode), OVP,
OTP, and UVP
Applications
The IC is packaged in a space conscious 32 Ld
5mm×5mm TQFN. The package uses an EPAD to
improve thermal performance and noise immunity.
The full feature design with low pin count makes the
ISL81807 an ideal solution for quick time to market
simple power supply designs.
▪ Telecommunication
▪ Server and data center
▪ Automotive electronics
▪ Industrial equipment
▪ Power system
R16DS0186EU0100 Rev.1.00
Mar 22, 2022
Page 1
© 2022 Renesas Electronics
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