L4940

L4940 STMICROELECTRONICS | Alldatasheet

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Technical content

VERY LOW DROP 1.5 A REGULATORS November 1999 n PRECISE 5 V, 8.5 V, 10 V, 12 V OUTPUTS n LOW DROPOUT VOLTAGE (500 mV typ at 1.5A) n VERY LOW QUIESCENT CURRENT n THERMAL SHUTDOWN n SHORT CIRCUIT PROTECTION n REVERSE POLARITY PROTECTION

DESCRIPTION

The L4940 series of three terminal positive regulators is available in TO-220 and D2PAK package and with several fixed output voltages, making it useful in a wide range of industrial and consumer applications. Thanks to its very low input/output voltage drop, these devices are particularly suitable for battery powered equipments, reducing consumption and prolonging battery life. Each type employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection. BLOCK DIAGRAM D 2PAK TO-263 TO-220

PIN CONNECTION AND ORDER CODES ORDERING NUMBERS OUTPUT VOLTAGE TO-220 D 2PAK L4940V5 L4940D2T5 5V L4940V85 L4940D2T85 8.5V L4940V10 L4940D2T10 10V L4940V12 L4940D2T12 12V ABSOLUTE MAXIMUM RATING Symbol Description Values Unit V I Forward Input Voltage 30 V V IR Reverse Input Voltage VO =5V R O = 100Ω -15 V VO = 8.5 V RO = 180Ω VO =1 0V R O = 200Ω VO =1 2V R O = 240Ω IO Output Current Internally Limited P tot Power Dissipation Internally Limited Tj,T st g Junction and Storage Temperature -40 to 150 o C THERMAL DATA Symbol Description Value Unit TO-220 D 2PAK R thj-case R thj-amb Thermal Resistance Junction-case Max Thermal Resistance Junction-ambient Max 62.5 oC/W oC/W L4940 series

ELECTRICAL CHARACTERISTICS FOR L4940V85 (refer to the test circuits, Tj=2 5oC, Vi= 10.5V, Ci= 0.1µF, Co =2 2µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit V o Output Voltage I o = 500 mA 8.3 8.5 8.7 V V o Output Voltage I o = 5 mA to 1500 mA Vi= 10.2 to 16 V 8.15 8.5 8.85 V V i Operating Input Voltage I o = 5 mA 17 V Δ V o Line Regulation I o = 5 mA V i= 9.5 to 17 V 4 9 mV Δ V o Load Regulation I o = 5 to 1500 mA Io = 500 to 1000 mA mV IQ Quiescent Current I o =5m A Io = 1.5 A Vi= 10.2 V mA Δ IQ Quiescent Current Change Io =5m A Io = 1.5 A Vi= 10.2 to 16 V 2.5 mA Δ Vo ΔT Output Voltage Drift 0.8 mV/ oC SVR Supply Voltage Rejection I o = 1 A f= 120 Hz 58 66 dB V d Dropout Voltage I o = 0.5 A Io = 1.5 A 200 500 400 900 mV Isc Short Circuit Current V i=1 4V Vi= 10.2 V 2.2 2.7 2.9 A ELECTRICAL CHARACTERISTICS FOR L4940V5 (refer to the test circuits, Tj=2 5oC, Vi= 7V, Ci= 0.1µF, Co =2 2µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit V o Output Voltage I o = 500 mA 4.9 5 5.1 V V o Output Voltage I o = 5 mA to 1500 mA Vi= 6.5 to 16 V 4 . 855 . 2V V i Operating Input Voltage I o = 5 mA 17 V Δ V o Line Regulation I o = 5 mA V i= 6 to 17 V 4 10 mV Δ V o Load Regulation I o = 5 to 1500 mA Io = 500 to 1000 mA mV IQ Quiescent Current I o =5m A Io = 1.5 A Vi= 6.5 V mA Δ IQ Quiescent Current Change Io =5m A Io = 1.5 A Vi= 6.5 to 16 V mA Δ Vo ΔT Output Voltage Drift 0.5 mV/ oC SVR Supply Voltage Rejection I o = 1 A f= 120 Hz 58 68 dB V d Dropout Voltage I o = 0.5 A Io = 1.5 A 200 500 400 900 mV Isc Short Circuit Current V i=1 4V Vi= 6.5 V 2.2 2.7 2.9 A L4940 series

ELECTRICAL CHARACTERISTICS FOR L4940V10 (refer to the test circuits, Tj=2 5oC, Vi= 12V, Ci= 0.1µF, Co =2 2µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit V o Output Voltage I o = 500 mA 9.8 10 10.2 V V o Output Voltage I o = 5 mA to 1500 mA Vi= 11.7 to 16 V 9.6 10 10.4 V V i Operating Input Voltage I o = 5 mA 17 V Δ V o Line Regulation I o = 5 mA V i=1 1t o1 7V 3 8 m V Δ V o Load Regulation I o = 5 to 1500 mA Io = 500 to 1000 mA mV IQ Quiescent Current I o =5m A Io = 1.5 A Vi= 11.7 V mA Δ IQ Quiescent Current Change Io =5m A Io = 1.5 A Vi= 11.7 to 16 V mA Δ Vo ΔT Output Voltage Drift 1 mV/ oC SVR Supply Voltage Rejection I o = 1 A f= 120 Hz 56 62 dB V d Dropout Voltage I o = 0.5 A Io = 1.5 A 200 500 400 900 mV Isc Short Circuit Current V i=1 4V Vi= 11.7 V 2.2 2.7 2.9 A A ELECTRICAL CHARACTERISTICS FOR L4940V12 (refer to the test circuits, Tj=2 5oC, Vi= 14V, Ci= 0.1µF, Co =2 2µF unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit V o Output Voltage I o = 500 mA 11.75 12 12.25 V V o Output Voltage I o = 5 mA to 1500 mA Vi= 13.8 to 17 V 11.5 12 12.5 V V i Operating Input Voltage I o = 5 mA 17 V Δ V o Line Regulation I o = 5 mA V i=1 3t o1 7V 3 7 m V Δ V o Load Regulation I o = 5 to 1500 mA Io = 500 to 1000 mA mV IQ Quiescent Current I o =5m A Io = 1.5 A Vi= 13.8 V mA Δ IQ Quiescent Current Change Io =5m A Io = 1.5 A Vi= 13.8 to 16 V 1.5 mA Δ Vo ΔT Output Voltage Drift 1.2 mV/ oC SVR Supply Voltage Rejection I o = 1 A f= 120 Hz 55 61 dB V d Dropout Voltage I o = 0.5 A Io = 1.5 A 200 500 400 900 mV Isc Short Circuit Current V i=1 4V 2 2 . 7 A Zo Output Impedance f = 1KHz I o = 0.5A 40 m Ω L4940 series

DIM. mm inch A 4.8 0.189 C 1.37 0.054 D 2.4 2.8 0.094 0.110 D1 1.2 1.35 0.047 0.053 E 0.35 0.55 0.014 0.022 F 0.61 0.94 0.024 0.037 F2 1.15 1.4 0.045 0.055 H2 10.4 0.409 H3 10.05 10.4 0.396 0.409 L2 16.2 0.638 L5 2.6 3 0.102 0.118 L6 15.1 15.8 0.594 0.622 L7 6 6.6 0.236 0.260 P011D TO-220 MECHANICAL DATA L4940 series

DIM. mm inch A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 B 0.7 0.93 0.027 0.036 B2 1.14 1.7 0.044 0.067 C 0.45 0.6 0.017 0.023 C2 1.23 1.36 0.048 0.053 D 8.95 9.35 0.352 0.368 E 10 10.4 0.393 0.409 G 4.88 5.28 0.192 0.208 L 15 15.85 0.590 0.624 L2 1.27 1.4 0.050 0.055 L3 1.4 1.75 0.055 0.068 L2 L3L B2 B GE A D C DETAIL”A” DETAIL”A” P011P6/F TO-263 (D2PAK) MECHANICAL DATA L4940 series

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