L4943 ® MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO 3 PROGRAMMABLE OUTPUTS: 3 TO 11V (500mA); 3 TO 11V (500mA); 3 TO 7V (500mA) STANDBY OUT1 AND OUT2 WITH INDEPENDENT ENABLE CONTROL FOR STAND-BY MODE 0.4A HIGH SIDE DRIVER LOAD DUMP PROTECTION THERMAL SHUTDOWN ♦ ♦ ♦ DESCRIPTION The L4943 contains a triple voltage regulator and a high side driver. In stand-by the output is active as long as possible even when in thermal shutdown or under any other fault conditions. The STCAP pin allows the use of a reserve supply capacitor that will hold enough energy for the Multiwatt 15 ORDERING NUMBER: L4943 5V Stand-by line to allow the µP to store data. BLOCK DIAGRAM FILTER CAP ST CAP EN1 EN2 VS 12 11 GEN 1 10 7 VADJ1 (3÷11)V 0.5A 2 VADJ2 (3÷11)V 0.5A 5 HSD LOAD DUMP December 2000 VMEM (3÷7)V 0.5A REF 6 3 8 P-GND S-GND TAB 13 9 14 4 VMEM VMEM_feed VADJ1 VADJ1_feed VADJ2 VADJ2_feed HSD D97AU668B 1/6 L4943 ABSOLUTE MAXIMUM RATINGS Symbol VS IO Vin RESR Ptot Top Tstg Parameter Value DC Operating Supply Voltage Transient Supply Overvoltage (50ms) Voltage Regulator Output Current Unit -0.6 to 30 V 50 Internally limited V Input Voltage (EN1, EN2) 0 to 6 V Output Capacitor Series Eq. Resistance Power Dissipation (Tcase = 85°C) 0.2 to 10 33 Ω W Operating Temperature Range -40 to 85 °C Storage Temperature Ranges -55 to 150 °C PIN CONNECTION (t.b.d.) TAB CONNECTED TO PIN 8 15 FILTER CAP 14 V2 feed 13 V1 feed 12 ST CAP 11 VMEM 10 VMEM_feed 9 V2 8 TAB 7 V1 6 P-GND 5 VS 4 HSD 3 S-GND 2 EN2 1 EN1 D97AU674A THERMAL DATA 2/6 Symbol Parameter RTh j-case Thermal Resistance Junction to Case Value Unit 2 °C/W L4943 ELECTRICAL CHARACTERISTICS (Referred to Test & Application Circuit; VS = 14.4V; Tamb = 25°C; unless otherwise specified). Symbol Parameter Test Condition Min. Typ. Max. Unit 2.85 4.75 6.65 3 5 7 3.15 5.25 7.35 V V V 5V STAND-BY Vout Mem Output Voltage no load; 1+R1/R2 = 2.4 no load; 1+R1/R2 = 4 no load; 1+R1/R2 = 5.6 ∆Vline Line Regulation no load; 11<Vs<18V 5 50 mV ∆Vload Load Regulation Dropout Voltage 5mA < IO < 500mA IO = 200mA, VO = 5V IO = 500mA, VO = 5V 8 80 mV 0.36 0.9 0.5 1.25 V V Current Limit Out short to GND Quiescent Current IO = 100µA; EN1 = EN2 =0 IO = 500mA; EN1 = EN2 = 5V Vdropout Ilim Iqst-by 550 800 1000 mA 0.35 10 0.5 25 mA mA 3 5 11 3.15 5.25 11.55 V V V 0.7 7 mV/V 8 80 mV 0.45 1.1 0.4 1 0.6 1.5 0.55 1.4 V V V V 1000 25 mA mA ADJUSTABLE REG1 SWITCHED Voutadj Output Voltage no load; 1+R3/R4 = 2.4 no load; 1+R3/R4 = 4 no load; 1+R3/R4 = 8.8 2.85 4.75 10.45 ∆Vline Line Regulation no load ∆Vload Load Regulation 5mA < IO < 500mA Vdropout Dropout Voltage IO = IO = IO = IO = Current Limit Quiescent Current Out short to GND IO = 500mA 550 800 10 Supply Voltage Rejection EN ADJ1 ON f = 0.1 to 10kHz, VO = 5V 45 2 55 Ilim Iq2 SVR EN1 on 200mA, VO = 5V 500mA, VO = 5V 200mA, VO = 11V 500mA, VO = 11V EN1 off EN ADJ1 OFF ADJUSTABLE REG2 SWITCHED Voutadj Output Voltage no load; 1+R3/R4 = 2.4 no load; 1+R5/R6 = 4 no load; 1+R3/R4 = 8.8 ∆Vline Line Regulation Load Regulation Dropout Voltage no load 5mA < IO < 500mA IO = 200mA, VO = 5V IO = 500mA, VO = 5V IO = 200mA, VO = 11V IO = 500mA, VO = 11V Out short to GND ∆Vload Vdropout Ilim Iq3 SVR EN2H on2 Current Limit Quiescent Current Supply Voltage Rejection EN ADJ2 ON IO = 500mA f = 0.1 to 10kHz, VO = 5V 2.85 4.75 10.45 550 45 1.3 1 V 3 5 11 3.15 5.25 11.55 V V V 0.7 12 7 80 mV/V mV 0.45 1.1 0.4 1 800 0.6 1.5 0.55 1.4 1100 V V V V mA 10 55 25 mA dB V 0.5 V 0.2 0.6 V 0.65 10 0.8 25 A mA V 1.7 V V EN2H off2 EN ADJ2 OFF 400mA HSD SWITCHED Vdropout Ilim Iqhsd EN2 on H EN2 off H EN2 Gap Dropout Voltage Current Limit Quiescent Current EN HSD ON EN HSD OFF EN HSD ON minus EN ADJ2 ON IO = 400mA, 9V < VS < 16V 0.45 IO = 400mA dB V 2.5 1 3/6 L4943 Figure 1. Application circuit. 10µF FILTER CAP 15 ST CAP 12 GEN REF 470µF EN1 11 VMEM 10 VMEM_feed VMEM (3÷7)V 0.5A 1 R1 7 VADJ1 (3÷11)V 0.5A 9 2 R4 R5 VADJ2_feed R6 LOAD DUMP P-GND 4/6 VADJ2 5 HSD 6 3 S-GND 4 HSD 8 TAB 10µF VADJ1_feed VADJ2 (3÷11)V 0.5A 14 VS R2 R3 13 EN2 VADJ1 10µF D97AU672B 10µF L4943 mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D 0.063 1 E 0.49 OUTLINE AND MECHANICAL DATA 0.039 0.55 0.019 0.022 F 0.66 0.75 0.026 G 1.02 1.27 1.52 0.040 0.050 0.060 0.030 G1 17.53 17.78 18.03 0.690 0.700 0.710 H1 19.6 0.772 H2 20.2 0.795 L 21.9 22.2 22.5 0.862 0.874 0.886 L1 21.7 22.1 22.5 0.854 0.870 0.886 L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 0.713 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 0.191 0.114 M1 4.63 5.08 5.53 0.182 0.200 0.218 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 Multiwatt15 V 5/6 L4943 Information furnished is believed to be accurate and reliable. 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