Renesas ISL6236IRZAR5281

控制器，笔记本电脑电源系统5.5V ~ 25V多重

Overview

The ISL6236IRZAR5281 dual step-down, switch-mode power-supply (SMPS) controller generateslogic-supply voltages in battery-powered systems. The ISL6236IRZAR5281 include two pulse-width modulation (PWM) controllers, 5V/3.3V and 1.5V/1.05V. The output of SMPS1 can also be adjusted from 0.7V to 5.5V. The SMPS2 output can be adjusted from 0V to 2.5V by setting REFIN2 voltage. An optional external charge pump can be monitored through SECFB. This device features a linear regulator providing 3.3V/5V, or adjustable from 0.7V to 4.5V output via LDOREFIN. The linear regulator provides up to 100mA output current with automaticlinear-regulator bootstrapping to the BYP input. When in switchover, the LDO output can source up to 200mA. The ISL6236IRZAR5281 includes on-board power-up sequencing, the power-good (POK) outputs, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. A constant ON-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.

Features

Tube Package
Widely used in Controller, Notebook Power System applications

Surface Mount Mounting Type

Applications

There are a lot of Renesas Electronics America Inc.
ISL6236IRZAR5281 Specialized Voltage Regulators applications.

• GSM Base Station
• LCD-TV/PDP-TV
• Copier/Printer
• Set-Top Box
• DDR Vooo and Vπ Voltage Generation
• PC Dual Power Supply
• Server DDR Power
• Desktop Computer
• Graphics Cards
• Cell Phones