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A5973D

STMicroelectronics
Part Number A5973D
Manufacturer STMicroelectronics
Description 2.5A switch step down switching regulator
Published Apr 1, 2008
Detailed Description A5973D Up to 2 A step-down switching regulator for automotive applications Datasheet - production data Applications ...
Datasheet PDF File A5973D PDF File

A5973D
A5973D

Overview
A5973D Up to 2 A step-down switching regulator for automotive applications Datasheet - production data Applications  Dedicated to automotive applications HSOP8 - exposed pad Description Features  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 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 Rth(JA) down to approximately 40 °C/W.
The device uses an internal P-channel DMOS transistor (with a typical RDS(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.
 Synchronization  Protection against feedback disconnection  Thermal shutdown Figure 1.
Application schematic November 2015 This is information on a product in full production.
DocID13957 Rev 9 1/41 www.
st.
com Contents Contents A5973D 1 Pin settings .
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4 1.
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