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

The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 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 SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40 °C/W.The device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mOhm) 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 is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.

2.5 A internal switch

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