A5973D

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产品概述

描述

The A5973D 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 with exposed frame, that allows to reduce the R_th(JA)down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical R_DS(on)of 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 fits the automotive applications requiring the device operation even in cold crank conditions. A pulse-by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

所有功能
Qualified following the AEC-Q100 requirements (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
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