2x Intersil ISL62392 HRTZ ISL62392HRTZ IC Chip Power Supply Controller
£4.19
High-Efficiency, Triple-Output System Power Supply Controller for Notebook Computers
The ISL62391, ISL62392, ISL62391C and ISL62392C controller generate supply voltages for battery-powered systems. It includes two pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and a linear regulator (LDO3) that generates a fixed 3.3V and can deliver up to 100mA. The ISL62391, ISL62392, ISL62391C and ISL62392C include on-board power-up sequencing, a power-good (PGOOD) output, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. The patented R 3 PWM control scheme provides a low jitter system with fast response to load transients. Light-load efficiency is improved with period-stretching discontinuous conduction mode (DCM) operation. To eliminate noise in audio frequency applications, an ultrasonic DCM mode is included, which limits the minimum switching frequency to 28kHz. The ISL62391, ISL62391C and ISL62392, ISL62392C are identical except for how their overvoltage protection is handled. The ISL62391 and ISL62391C utilize a tri-state overvoltage scheme, whereas the ISL62392 and ISL62392C employ a soft-crowbar method. The ISL62391, ISL62392, ISL62391C and ISL62392C are available in a 28 Ld 4×4 TQFN package and operate over the extended temperature range (-40°C to +100°C)
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