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This is information on a product in full production.
March 2014 DocID14661 Rev 5 1/42
A5970AD
Up to 1 A step down-switching regulator for automotive applications
Datasheet - production data
Features
Qualified following the AEC-Q100
requirements (see PPAP for more details)
1 A DC output current
Operating input voltage from 4 V to 36 V
3.3 V / (± 2%) reference voltage
Output voltage adjustable from 1.235 V to V
IN
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
Application
Dedicated to automotive applications
Description
The A5970AD is a step-down monolithic power
switching regulator with a minimum switch current
limit of 1.35 A so it is able to deliver up to 1 A DC
current to the load depending on the application
conditions. The output voltage can be set from
1.235 V to V
IN
.
The device uses an internal P-channel DMOS
transistor (with a typical R
DS(on)
of 250 m) as
switching element to minimize the size of the
external components.
An internal oscillator fixes the switching frequency
at 500 kHz. Having a minimum input voltage of
4 V only it fits the automotive applications
requiring the device operation even in cold crank
conditions. Pulse by pulse current limit with the
internal frequency modulation offers an effective
constant current short-circuit protection.
SO-8
Figure 1. Application schematic
A5970AD
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