MIC26950中文资料28V/12A Synchronous DC-DC Regulator w/Hyper Speed Control™数据手册Microchip规格书

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

简介

MIC26950属于集成电路（IC）的DCDC开关稳压器。由制造生产的MIC26950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。