IR3447A屬于集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器。由英飛凌科技股份公司制造生產(chǎn)的IR3447A穩(wěn)壓器 - DC-DC 開(kāi)關(guān)穩(wěn)壓器DC-DC 開(kāi)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(chēng)為“控制器”P(pán)MIC 的類(lèi)似產(chǎn)品的區(qū)別在于集成了主開(kāi)關(guān)元件，設(shè)備提供的電力會(huì)通過(guò)該元件。

特性 Features

? Single 4.3 V to 17 V application or Wide Input Voltage Range from 2 V to 17 V with external VCC

? Precision Reference Voltage (0.6 V +/-0.5)

? Enhanced Fast COT engine stable with Ceramic Output Capacitors and No External Compensation

? Switching Frequency of 600 kHz with Forced Continuous Conduction Mode

? Enable input with Voltage Monitoring Capability & Power Good Output

? Monotonic Start-Up with 2 ms soft start time & Enhanced Pre-Bias Start up

? Thermally compensated Internal Over Current Protection with two Selectable Settings

? Thermal Shut Down

? Operating Junction Temp: -40 oC < Tj < 125 oC

? Small Size: 5 mm x 6 mm PQFN

? Halogen-free and RoHS2 Compliant with Exemption 7a

Potential applications

? Server Applications

? Storage Applications

? Telecom & Datacom Applications

? Distributed Point of Load Power Architectures

Product validation

Qualified for industrial applications according to the relevant tests of JEDEC47/20/22

描述 Description

The IR3447A is an easy-to-use, fully integrated dc - dc Buck regulator. The onboard PWM controller and MOSFETs

with integrated bootstrap diode make IR3447A a small footprint solution, providing high-efficiency power

delivery. Furthermore, it uses a fast Constant On-Time (COT) control scheme, which simplifies design efforts and

provides fast control response.

The IR3447A has an internal low dropout voltage regulator, allowing operation with a single supply. It can also

operate with an external bias supply, extending the operating input voltage (PVIN) range. The IR3447A offers a

switching frequency of 600 kHz, two selectable current limits, soft start time of 2 ms, and Forced Continuous

Conduction Mode (FCCM).

It also features important protection functions, such as pre-bias start-up, thermally compensated current limits,

over voltage and under voltage protection, and thermal shutdown to give required system level security in the

event of fault conditions.