L9468

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...