Datasheet > ISL81802

ISL81802

更新时间： 2024-11-05 14:58:27

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
45页	1035K
描述
80V Dual Synchronous Buck Controller

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ISL81802 数据手册

Datasheet

ISL81802

80V Dual Synchronous Buck Controller

The ISL81802 is a dual synchronous buck 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: 0.8V to 76V

• Four MOSFET drivers with adaptive shoot-through

protection

telecommunication, data center, and computing

applications.

• Constant output voltage and output current

feedback loop control

The ISL81802 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

• Light-load efficiency enhancement

○ Low ripple diode emulation and burst mode

operation

• Programmable soft-start

Phase-Locked Loop (PLL) oscillator assures an

accurate frequency setting from 100kHz to 1MHz, 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 expanded to three, four, and six phases with

required interleaving phase shift.

• Supports startup into pre-biased rails

• Programmable frequency: 100kHz to 1MHz

• Supports current sharing with cascade phase

interleaving

• External clock sync

• Clock out with accurate phase angle controlled by

PLL or frequency dithering

The ISL81802 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.

• PGOOD indicator

• Output current monitor

• Selectable mode between PWM/DE/Burst

• Accurate EN/UVLO threshold: ±2%

• Low shut down current: 5µA

The IC is packaged in a spac- conscious 32 Ld

5mmx5mm TQFN or an easy to assemble

4.4mmx9.7mm 38 Ld HTSSOP package. Both

packages use an EPAD to improve thermal

performance and noise immunity. The full feature

design with low pin count makes the ISL81802 an

ideal solution for quick time to market simple power

supply designs.

• Complete protection: OCP (pulse by pulse and

optional hiccup or constant current mode), OVP,

OTP, and UVP

Applications

• Telecommunication

• Server and data center

• Automotive electronics

• Industrial equipment

• Power system

Related Literature

For a full list of related documents, visit our website:

• ISL81802 device page

R16DS0033EU0101 Rev.1.01

Oct.15.20

Page 1 of 44

12 3 4 5 6 7...45

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