STMicroelectronics A5973D

Description

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 DCcurrent 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 alsoachieved thanks to an HSOP8 package with exposed frame, that allows to reduce the Rth(JA) down to approximately 40 °C/W. The device usesan 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 applicationsrequiring 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.

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 feed-forward
• Zero load current operation
• Internal current limiting
• Inhibit for zero current consumption
• Synchronization
• Protection against feedback disconnection
• Thermal shutdownREMARKS:-Table8.Inductor selection

Typical applications

• Dedicated to automotive applications

More information

• Datasheet
• IC product information