A6985F中文资料38 V 0.5 A同步降压开关稳压器，30 uA静态电流数据手册ST规格书

描述 Description

The A6985F automotive grade device is a step-down monolithic switching regulator able to deliver up to 0.5 A DC. The output voltage adjustability ranges from 0.85 V to VIN. The 100% duty cycle capability and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. The “Low Consumption Mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light-load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the low noise application specification like car audio. 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

• AEC-Q100 qualified
• 0.5 A DC output current
• 4 V to 38 V operating input voltage
• Low consumption mode or low noise mode
• 30 μA IQat light-load (LCM VOUT = 3.3 V)
• 8 μA IQ-SHTDWN
• Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
• Adjustable fSW (250 kHz - 2 MHz)
• Embedded output voltage supervisor
• Synchronization
• Adjustable soft-start time
• Internal current limiting
• Overvoltage protection
• Output voltage sequencing
• Peak current mode architecture
• RDSON HS = 360 mΩ, RDSON LS = 150 mΩ
• Thermal shutdown

简介

A6985F属于集成电路（IC）的稳压器-DC-DC开关稳压器。由ST制造生产的A6985F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。