CAT32数据手册集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF

描述 Description

The CAT32 is a DC/DC step up converter that delivers a regulated output current. Operation at a constant switching frequency of 1.2MHz allows the device to be used with very small value external inductor and ceramic capacitors.The CAT32 is targeted to drive multiple white light-emitting diodes (LEDs) connected in series and provides the necessary regulated current to control the brightness and the color purity. An external resistor RSET controls the output current level. LED currents of up to 40mA can be supported over a wide range of input supply voltages from 2V to 7V, making the device ideal for battery-powered applications.A high voltage output stage allows up to 4 White LEDs to be driven in series. Series drive provides inherent current matching.LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power-down mode with 'near zero' quiescent current.In addition to overcurrent limiting protection, the device also includes detection circuitry to ensure protection against open-circuit load fault conditions.The device is available in a low profile (1mm max height) 6-lead TSOT-23 package.

特性 Features

• Low quiescent ground current (0.5 mA typical)
• Power efficiency over 80%
• Compatible pinout with LT1932
• Adjustable output current (up to 40 mA)
• High frequency 1.2 MHz operation
•Input voltage operation down to 2.0 V
• Low resistance (0.5Ω) high voltage power switch
• Drives up to 4 White LEDs in series
• Shutdown current less than 1µA
• Load fault protection against open-circuits
• Low value external components

应用 Application

• Color LCD and keypad backlighting
• Mobile Phones
• Portable MP3 Players
• Digital Cameras

简介

CAT32属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的CAT32稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。