B5973D中文资料Up to 2 A step down switching regulator for automotive applications数据手册ST规格书

描述 Description

The B5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.25 A so it is able to deliver up to 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an HSOP8 package (i.e. SO8 package with exposed frame), that allows to reduce the Rth(JA)down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDSonof 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

特性 Features

• Qualified following the AEC-Q100 requirements (temperature Grade 1), see PPAP for more details.
• 2 A DC output current
• Operating input voltage from 4 V to 36 V
• 3.3 V / (± 2 %) reference voltage
• Output voltage adjustable from 1.235 V to 35 V
• Low dropout operation: 100 % duty cycle
• 250 kHz internally fixed frequency
• Voltage feedforward
• Zero load current operation
• Internal current limiting
• Inhibit for zero current consumption
• Synchronization
• Protection against feedback disconnection
• Thermal shutdown

简介

B5973D属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的B5973D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。