STMicroelectronics B5973D

Description

The B5973D 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 (i.e. SO8 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 RDSonof 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 is particularly suitable for 5 V bus. 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 (temperature Grade 1), 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 shutdownREMARKS:-Refer page no 25Table 8.Inductor selection

Typical applications

• Dedicated to automotive applications

More information

• Datasheet
• IC product information