L9468
ALL SILICON VOLTAGE REGULATOR
1 Features
■ FULLY MONOLITHIC DESIGN ■ HIGH SIDE FIELD DRIVE ■ THERMAL PROTECTION ...
L9468
ALL SILICON
VOLTAGE REGULATOR
1 Features
■ FULLY MONOLITHIC DESIGN ■ HIGH SIDE FIELD DRIVE ■ THERMAL PROTECTION ■ FIELD DRIVER SHORT CIRCUIT
PROTECTION ■ PROTECTED DIAGNOSTIC LAMP DRIVER ■ REDUCED OUTPUT MODE ■ COMPLEX DIAGNOSTICS ■ LOAD RESPONSE CONTROL
2 Description
The L9468 is a monolithic multifunction generator
Voltage regulator intended for use in automotive ap-
Figure 2. Block Diagram
Figure 1. Package
Multiwatt8
Table 1. Order Codes
Part Number L9468N
Package Multiwatt8
plications.
This device regulates the output of an automotive generator by controlling the field winding current by means of a variable frequency PWM high side driver.
TO ECM
FM
F+
FIELD (ROTOR)
S
ASVR
G
FAULT L LAMP KEY SW
VGO
STARTER
BATTERY
P LOADS STATOR
RECTIFIER BRIDGE
D02AT503
September 2013
Rev. 2 1/8
L9468
Table 2. Pin Description
N° Pin
Function
1 VGO Generator output sense and
voltage supply to L9468
2 F+ Field high side driver output
3 G Ground for L9468
4 S Battery sense input
5 GND Connected to the Tab through the frame
6 FM Field monitor output
7 L Lamp terminal low side driver
8 P Phase sense input
Table 3. Absolute Maximum Ratings
Symbol
Parameter
VS Thermal Supply
Voltage (load dump)
IO Output Current Capability
Ptot Total Power Dissipation (@Tcase = 150°C, IFIELD = 5A)
VR Reverse
Voltage (see figure 1)
Figure 3. Pin Connection (Top view)
Value 40
internally limited 6
-2.5/-6
Unit V A W V
Tab connected to pin 5
8 7 6 5 4 3 2 1
P L FM GN...