ST1S10屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的ST1S10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(jí)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(huì)通過該元件。

描述 Description

The ST1S10 is a high efficiency step-down PWM current mode switching regulator capable of providing up to 3 A of output current. The device operates with an input supply range from 2.5 V to 18 V and provides an adjustable output voltage from 0.8 V (VFB) to 0.85*VIN_SW [VOUT = VFB*(1+R1/R2)]. It operates either at a 900 kHz fixed frequency or can be synchronized to an external clock (from 400 kHz to 1.2 MHz). The high switching frequency allows the use of tiny SMD external components, while the integrated synchronous rectifier eliminates the need for a Schottky diode. The ST1S10 provides excellent transient response, and is fully protected against thermal overheating, switching over-current and output short circuit.

The ST1S10 is the ideal choice for point-of-load regulators or LDO pre-regulation.

特性 Features

■ Step-down current mode PWM regulator

■ Output voltage adjustable from 0.8 V

■ Input voltage from 2.5 V up to 18 V

■ 2 DC output voltage tolerance

■ Synchronous rectification

■ Inhibit function

■ Synchronizable switching frequency from 400 kHz up to 1.2 MHz

■ Internal soft start

■ Dynamic short circuit protection

■ Typical efficiency: 90

■ 3 A output current capability

■ Stand-by supply current: max 6 μA over temperature range

■ Operative junction temp: from -25°C to 125°C

Applications

■ Consumer

– STB, DVD, DVD recorders, TV, VCR, car audio, LCD monitors

■ Networking

– XDSL, modems, DC-DC modules

■ Computer

– Optical storage, HD drivers, printers, audio/graphic cards

■ Industrial and security

– Battery chargers, DC-DC converters, PLD, PLA, FPGA, LED drivers