描述 Description

The L6986H is a step-down monolithic switching regulator able to deliver up to 2 A DC. The output voltage adjustability ranges from 0.85 V to VIN. Thanks to the P-channel MOSFET high-side power element, the device features 100% duty cycle operation. The wide input voltage range meets the specification for the 5 V, 12 V and 24 V power supplies.

The “l(fā)ow consumption mode” (LCM) is designed for applications active during idle mode, so it maximizes the efficiency at light-load with controlled output voltage ripple. The “l(fā)ow noise mode” (LNM) makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the low noise application specifications. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA). The RST open collector output can also implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. Pulse by pulse current sensing on both power elements implements an effective constant current protection.

特性 Features

? 2 A DC output current
? 4 V to 38 V operating input voltage
? Low consumption mode or low noise mode
? 30 μA IQ at light-load (LCM VOUT = 3.3 V)
? 8 μA IQ-SHTDWN
? Adjustable fSW (250 kHz - 2 MHz)
? Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
? Embedded output voltage supervisor
? Synchronization
? Adjustable soft-start time
? Internal current limiting
? Overvoltage protection
? Output voltage sequencing
? Peak current mode architecture
? RDS(on) HS = 180 mΩ, RDS(on) LS = 150 mΩ
? Thermal shutdown

簡介

L6986H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L6986H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。