L9468N STMicroelectronics

L9468 ALL SILICON VOLTAGE REGULATOR Figure 1. Package 1Features FULLY MONOLITHIC DESIGN HIGH SIDE FIELD DRIVE THERMAL PROTECTION FIELD DRIVER SHORT CIRCUIT Multiwatt8 PROTECTION Table 1. Order Codes PROTECTED DIAGNOSTIC LAMP DRIVER Part Number Package REDUCED OUTPUT MODE L9468N Multiwatt8 COMPLEX DIAGNOSTICS LOAD RESPONSE CONTROL plications. 2 Description This device regulates the output of an automotive The L9468 is a monolithic multifunction generator generator by controlling the field winding current by Voltage regulator intended for use in automotive ap- means of a variable frequency PWM high side driver. Figure 2. Block Diagram S FAULT LAMP L KEY SW F V M GO TO ECM STARTER BATTERY ASVR F+ P LOADS STATOR FIELD (ROTOR) RECTIFIER BRIDGE G D02AT503 Rev. 2 September 2013 1/8L9468 Table 2. Pin Description N Pin Function 1V Generator output sense and voltage supply to L9468 GO 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 6F Field monitor output M 7 L Lamp terminal low side driver 8 P Phase sense input Table 3. Absolute Maximum Ratings Symbol Parameter Value Unit V Thermal Supply Voltage (load dump) 40 V S I Output Current Capability internally limited A O P Total Power Dissipation ( T = 150C, I = 5A) 6 W tot case FIELD V Reverse Voltage (see figure 1) -2.5/-6 V R Figure 3. Pin Connection (Top view) 8 P 7 L 6 F M 5 GND 4 S 3 G 2 F+ 1 V GO Tab connected to pin 5 D02AT504 Table 4. Thermal Data Symbol Parameter Value Unit R Thermal Resistance junction-case -45 to 160 C th j-case T Storage Temperature -50 to 175 C stg R Thermal Shut-Down 175 15 C th sd R Thermal Resistance junction -case 1.5 C/W th j-case 2/8