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

簡(jiǎn)介

B5973D屬于集成電路（IC）的穩(wěn)壓器-DC-DC開(kāi)關(guān)穩(wěn)壓器。由制造生產(chǎn)的B5973D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。