STMicroelectronics R5973D

Description

switching regulator with a minimum switch currentlimit of 2.25 A so it is able to deliver up to 2 A DCcurrent to the load depending on the applicationconditions. The output voltage can be set from1.235 V to 35 V. The high current level is alsoachieved thanks to an HSOP8 package withexposed frame, that allows to reduce the Rth(JA)down to approximately 40 °C/W. The device usesan internal P-channel DMOS transistor (witha typical RDS(on) of 250 m) as switching elementto minimize the size of the external components.An internal oscillator fixes the switching frequencyat 250 kHz. The large ambient temperature rangemakes it ideal for aerospace and defenseapplications. A pulse-by-pulse current limit withthe internal frequency modulation offers aneffective constant current short-circuit protection.

Features

 General features– 2 A DC output current– Operating input voltage from 4 V to 36 V– 3.3 V / (± 2%) reference voltage– Large ambient temperature range:

• 40 °C to 125 °C– Output voltage adjustable from 1.235 V to35 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 shutdown
• Aerospace and defense features– Suitable for use in aerospace and defenseapplications– Dedicated traceability and part marking– Production parts approval documentsavailable– Adapted extended life time andobsolescence management– Extended product change notificationprocess– Designed and manufactured to meet subppmquality goals

Typical applications

• Dedicated to aerospace and defense applications

More information

• Datasheet
• IC product information