描述 Description

The MIC26950 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture. The MIC26950 operates over an input supply range of 4.5V to 26V and provides a regulated output at up to 12A of output current. The output voltage is adjustable down to 0.8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300kHz. Hyper Speed Control? architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. The MIC26950 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, fold-back current limit, \"hiccup\" mode short-circuit protection and thermal shutdown.

特性 Features

? Hyper Speed Control? architecture enables
? High delta V operation (VIN = 26V and VOUT = 0.8V)
? Small output capacitance
? 4.5V to 26V input voltage
? Adjustable output from 0.8V to 5.5V (±1% accuracy)
? Any Capacitor? Stable
? Zero ESR to high-ESR output capacitance
? 12A output current capability
? 300kHz switching frequency
? Internal compensation
? Up to 95% efficiency
? 6ms Internal soft-start
? Foldback current-limit and \"hiccup\" mode short-circuit protection
? Thermal shutdown
? Supports safe start-up into a pre-biased load
? -40°C to +125°C junction temperature range

簡(jiǎn)介

MIC26950屬于集成電路（IC）的DCDC開(kāi)關(guān)穩(wěn)壓器。由制造生產(chǎn)的MIC26950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。