Part # A5970 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: Up to 1 A step down switching regulator for automotive applications

Part Details:

A5970D Up to 1 A step down switching regulator for automotive applications Features Qualified following the AEC-Q100 requirements (temperature grade 3), see PPAP for more details. Up to 1 A DC output current SO-8 Operating input voltage from 4 V to 36 V Output voltage adjustable from 1.235 V to 35 V Description Low dropout operation: 100 % duty cycle The A5970D is a step down monolithic power 250 kHz Internally fixed frequency switching regulator capable to deliver up to 1 A at Voltage feedforward output voltages from 1.2 V to 35 V. Zero load current operation The device uses an internal P-channel D-MOS Internal current limiting transistor (with a typical RDS(on) of 250 m) as Inhibit for zero current consumption switching element to minimize the size of the external components. Synchronization An internal oscillator fixes the switching frequency Protection against feedback disconnection at 250 kHz. Thermal shutdown Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus. Applications Pulse by pulse current limit with the internal Dedicated to automotive applications frequency modulation offers an effective constant current short circuit protection. Figure 1. Application schematic L1 33uH VI V N I = N 4. = 4V 4. t 4V o t o 35V Vout V = out 3 = . 3 3 . V 35V

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A5970.pdf Datasheet