Up to 1 A step down-switching regulator for aerospace applications

Topologie: Buck
Eingangsspannung (min.): 4.00 V
Eingangsspannung (max.): 36.00 V
Schaltfrequenz (min.): 430.00 kHz
Schaltfrequenz (max.): 570.00 kHz
Ausgang 1: 36.00 V / 1.000 A

Erstveröffentlichung am 01.10.2014, Version 1 vom


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.


  • 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 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– Advanced mold and frame designs forsuperior resilience in harsh environments(acceleration, EMI, thermal, humidity)– Extended screening capability on request


  Artikel Nr. SPEC Produktserie L
IR 1
RDC typ.
RDC max.
RDC1 typ
RDC1 max.
fres 1
Montageart Muster
74456115 PDF WE-PD4 SMT-Speicherdrossel 15 15 2.9 2.9 3.6 3.6 0.043 0.06 0.043 0.06 17 17 SMT