Conv DC-DC Single Step Down 4V to 36V 8-Pin HSOP EP T/R

The A5973AD is a step-down monolithic power switching regulator with a minimum switch current limit of 1.8 A, so it is able to deliver up to 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to VIN. The high current level is also achieved thanks to an HSOP8 package with an 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 mO) as a switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 500 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.

Qualified following the AEC-Q100 requirements (see PPAP for more details)

1.5 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 V_IN

Low dropout operation: 100% duty cycle

500 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 shutdown