描述 Description

The LTC1514-3.3/LTC1514-5 are micropower switched capacitor DC/DC converters that produce a regulated output voltage by either stepping up or stepping down the input voltage. Output voltage is fixed at either 3.3V (LTC1514-3.3) or 5V (LTC1514-5) by an internal resistor divider.

A unique architecture allows the parts to accommodate a wide input voltage range (2V to 10V) while maintaining +4% regulation. Additional circuitry prevents excessive inrush current and output voltage ripple when large VIN to VOUT differentials are present.

An internal uncommitted comparator is kept active in shutdown. The comparator has an open-drain output for flexible interfacing.

The parts are short-circuit and overtemperature protected. Battery life is maximized by very low operating currents (ICC= 60μA typ, 10μA in shutdown). Both parts are available in an SO-8 package.

Applications

Battery Operated Equipment Smart Card Readers Local Power Supplies Handheld Instruments Battery Backup Supplies

特性 Features

? 3.3V or 5V Output Voltages

? 2V to 10V Input Voltage Range

? Up to 50mA Output Current

? Only Three External Capacitors Required

? Soft Start Limits Inrush Current at Turn-On

? Low Operating Current: 60μA

? Low Shutdown Current: 10μA

? Shutdown Disconnects Load from VIN

? Short-Circuit and Overtemperature Protected

? 650kHz Switching Frequency

? Low-Battery Comparator Active in Shutdown

? Available in SO-8 Package

簡介

LTC1514屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由制造生產(chǎn)的LTC1514穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。