A5970D
Up to 1 A step-down switching regulator for automotive applications
Datasheet - production data
Protection a...
A5970D
Up to 1 A step-down switching
regulator for automotive applications
Datasheet - production data
Protection against feedback disconnection Thermal shutdown
Applications
SO-8
Dedicated to automotive applications
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 VIN Low dropout operation: 100% duty cycle 250 kHz Internally fixed frequency
Description
The A5970D 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 VIN.
The device uses an internal p-channel DMOS
transistor (with a typical RDS(on) of 250 m) as switching element to minimize the size of the external components.
Voltage feed-forward Zero load current operation Internal current limiting Inhibit for zero current consumption Synchronization
An internal oscillator fixes the switching frequency at 250 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.
Figure 1. Application schematic
November 2015
T...