STMicroelectronics R5974AD

Description

The R5974AD is a step-down monolithic powerswitching regulator with a minimum switch currentlimit of 2.5 A, it is therefore able to deliver up to2 A DC current to the load depending on theapplication conditions. The output voltage can beset from 1.235 V to 35 V. The high current level isalso achieved thanks to a HSOP8 package withexposed frame, that allows to reduce the RTHJ-Adown 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 500 kHz. The large ambient temperature rangemakes it ideal for aerospace and defenseapplications. Pulse-by-pulse current limit with theinternal frequency modulation offers an effectiveconstant 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– 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
• 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 notificationprocessDesigned and manufactured to meet sub ppmquality goals– Advanced mold and frame designs forsuperior resilience in harsh environments(acceleration, EMI, thermal, humidity)– Extended screening capability on request

Typical applications

• Dedicated to aerospace applications

More information

• Datasheet
• IC product information