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This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
October 2014 DocID026997 Rev 1 1/37
R7986A
3 A step-down switching regulator for aerospace applications
Datasheet - target specification
Features
General features
– 3 A DC output current
– 4.5 V to 38 V input voltage
– Large ambient temperature range:
-40 °C to 125 °C
– Output voltage adjustable from 0.6 V
– 250 kHz switching frequency,
programmable up to 1 MHz
– Internal soft-start and enable
– Low dropout operation: 100% duty cycle
– Voltage feed-forward
– Zero load current operation
– Overcurrent and thermal protection
– HSOP8 package
Aerospace and defense features
– Suitable for use in aerospace and defense
applications
– Dedicated traceability and part marking
– Production parts approval documents
available
– Adapted extended life time and
obsolescence management
– Extended product change notification
process
– Designed and manufactured to meet sub-
ppm quality goals
– Advanced mold and frame designs for
superior resilience in harsh environments
(acceleration, EMI, thermal, humidity)
– Extended screening capability on request
Applications
Dedicated to aerospace applications
Aerospace LED driving
Description
The R7986A is a step-down switching regulator
with a 3.7 A (min.) current limited embedded
power MOSFET, so it is able to deliver up to 3 A
current to the load depending on the application
conditions.
The input voltage can range from 4.5 V to 38 V,
while the output voltage can be set starting from
0.6 V to V
IN
.
Requiring a minimum set of external components,
the device includes an internal 250 kHz switching
frequency oscillator that can be externally
adjusted up to 1 MHz. The large ambient
temperature range makes it ideal for aerospace
and defense applications.
The HSOP8 package with exposed pad allows
the reduction of R
th(JA)
down to 40 °C/W.
HSOP8 exposed pad
www.st.com
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 4
- ・ Abmessungen des Paketumrisses on Seite 34 Seite 35
- ・ Blockdiagramm on Seite 8
- ・ Beschreibung der Funktionen on Seite 8 Seite 9 Seite 10 Seite 11 Seite 12
- ・ Technische Daten on Seite 5
- ・ Anwendungsbereich on Seite 1
- ・ Elektrische Spezifikation on Seite 6 Seite 7
