Features
 Fully monolithic design
 High side field driver
 Field short circuit protection
 Regulated voltage driven by ECU (protocol
driven)
 Regulated voltage thermally compensated
(without protocol)
 Lamp driver (wake up and warning detection)
 Self start function
 Load response control (LRC)
 Field monitor (FM) output
 Thermal shutdown

Description
The device is a monolithic alternator voltage
regulator intended for use in automotive
application.
It includes the control section, the field power
stage, fault diagnostic circuit which drives a
warning lamp, and the protection against short
circuits.
This device regulates in close loop the output of
an automotive generator by controlling the field
winding current by means of a pulse-width
modulation (PWM) high side driver at fixed
frequency.
The set-point voltage reference selected by the
Engine Control Unit via C-terminal protocol is
temperature flat. An internal voltage reference
thermally compensated is present in the device
and used when the protocol coming from ECU is
absent or the wire is broken.
A self-bias circuitry is present on L pin in order to
turn-on the warning lamp also when the device is
not supplied (battery connection broken).