STMicroelectronics R5970AD

Description

The R5970AD is a step-down monolithic powerswitching regulator with a minimum switch currentlimit of 1.35 A so it is able to deliver up to 1 A DCcurrent to the load depending on the applicationconditions. The output voltage can be set from1.235 V to VIN.The device uses an internal P-channel DMOStransistor (with a typical RDS(on) of 250 m) asswitching element to minimize the size of theexternal 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– 1 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 toVIN

– 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 shutdownAerospace 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

– 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