ISL6845

Features:

•1A MOSFET gate driver
•60µA startup current, 100µA maximum
•25ns propagation delay current sense to output
•Fast transient response with peak current mode control
•Adjustable switching frequency to 2MHz
•20ns rise and fall times with 1nF output load
•Trimmed timing capacitor discharge current for accurate deadtime/maximum duty cycle control
•High bandwidth error amplifier
•Tight tolerance voltage reference over line, load, and temperature
•Tight tolerance current limit threshold
•Pb-Free Plus Anneal Available (RoHS Compliant)




Application

•Telecom and Datacom Power
•Wireless Base Station Power
•File Server Power
•Industrial Power Systems
•PC Power Supplies
•Isolated Buck and Flyback Regulators
•Boost Regulators




Pinout






Specifications

Supply Voltage, V_DD. . . . . . . . . . . . . . . . . . . GND - 0.3V to +20.0V
OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to V_DD+ 0.3V
Signal Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 6.0V
Peak GATE Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A
ESD Classification
Human Body Model (Per MIL-STD-883 Method 3015.7). . . 2000V
Charged Device Model (Per EOS/ESD DS5.3, 4/14/93) . . . 1000V




Description

The ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 family of adjustable frequency, low power, pulse width modulating (PWM) current mode controllers is designed for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Peak current mode ISL6845 control effectively handles power transients and provides inherent overcurrent protection.

This advanced BiCMOS ISL6845 design is pin compatible with the industry standard 384x family of controllers and offers significantly improved performance. Features include low operating current, 60µA start-up current, adjustable operating frequency to 2MHz, and high peak current drive capability with 20ns rise and fall times.