PDF L4963W Data sheet ( Hoja de datos )

Número de pieza	L4963W
Descripción	1.5A SWITCHING REGULATOR
Fabricantes	STMicroelectronics
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No Preview Available ! L4963 ® L4963D 1.5A SWITCHING REGULATOR 1.5A OUTPUT LOAD CURRENT 5.1 TO 36V OUTPUT VOLTAGE RANGE DISCONTINUOUS VARIABLE FREQUENCY MODE PRECISE (+/–2%) ON CHIP REFERENCE VERY HIGH EFFICIENCY VERY FEW EXTERNAL COMPONENTS NO FREQ. COMPENSATION REQUIRED RESET AND POWER FAIL OUTPUT FOR MI- CROPROCESSOR INTERNAL CURRENT LIMITING THERMAL SHUTDOWN DESCRIPTION The L4963 is a monolithic power switching regulator delivering 1.5A at 5.1V. The output voltage is adjust- able from 5.1V to 36V, working in discontinuous variable frequency mode. Features of the device include remote inhibit, internal current limiting and thermal protection, reset and power fail outputs for microprocessor. Powerdip12+3+3 SO20 ORDERING NUMBERS: L4963W L4963D The L4963 is mounted in a 12+3+3 lead Powerdip (L4963) and SO20 large (L4963D) plastic pack- ages and requires very few external components. BLOCK DIAGRAM June 2000 This is advanced information on a new product now in development or underogin evaluation. Details are subject to change without notice. 1/17 1 page L4963 - L4963D ELECTRICAL CHARACTERISTIC (Refer to the test circuit Vi = 30V Tj = 25°C unless otherwise specified ) Symbol Parameter Test Conditions Min. Typ. Max. Unit Fig. DYNAMIC CHARACTERISTICS Vo Vi V1 2 I12 VOS12 ∆Vo ∆Vo Vd I2L Io SVR V11 ∆V11 ∆V11 η Tsd Output Voltage Range Input Voltage Range Feedback Voltage Input Bias Current Input Offset Voltage Line Regulation Load Regulation Dropout Voltage Between pin 3 and pin 2 Current Limiting Maximum Operating Load Current Supply Voltage Ripple Rejection Reference Voltage Average Temperature Coefficient of Ref. Volt. Vref Line Regulation Vref Line Regulation Efficiency Thermal Shutdown Junction Temperature Hysteresis Vi = 46V Io = 0.5A Vo = Vref to 36V Io = 0.5A Vi = 9 to 46V Io = 0.5A Vi = 15V V12 = 6V V17f = 5V Vi = 9 to 46V Vo = Vref Io = 0.5A Vo = Vref Io = 0.5 to 1.5A I2 = 3A Vi = 20V Vi = 9 to 46V Vo = Vref to 28V Vi = 9 to 46V Vo = Vref Vi = 2Vrms Vo = Vref fripple = 100Hz Io = 1.5A Vi = 9 to 46V O < I11 < 5mA Tj = 0 to 125 °C Vi = 9 to 46V Iref = 0 to 5mA Vi = 46V Rosc = 51KΩ Io = 1.5A Vo = Vref Vref 36 9 46 5 5.1 5.2 V V V 2 2 2 5 20 µA 3a 5 10 mV 3a 15 50 mV 2 15 45 mV 2 1.5 2 V 2 3.5 6.5 A 2 1.5 A 2 50 56 dB 2 5 5.1 5.2 V 3a 0.4 10 65 69 7 65 75 145 150 30 mV/°C – 20 mV 3a 15 mV 3a %2 °C – °C – DC CHARACTERISTICS Iq Quescent Drain Current Vi = 46V Io = 0mA V16 = V12 = 0 V16 = Vref V12 = 5.3V 14 20 mA 3a 11 16 mA 3a INHIBIT V1 6L V16H I16L I16L Low Input Voltage High Input Voltage Input Current with Low Input Voltage Input Current with High Input Voltage Vi = 9 to 46V Vi = 9 to 46V V16 = 0.8V V16 = 2V 0.3 0.8 V 2 5.5 V 50 100 µA 10 20 µA 2 2 2 2 5/17 5 Page Figure 20: Efficiency vs. Output Voltage (Power- dip Package Only) L4963 - L4963D Figure 21: Current Limit vs. Junction Tempera- ture Vi = 30V Figure 22: Current Limit vs. Input Voltage Figure 23: Oscillator Frequency vs. R2 (see fig. 26) Figure 24: Oscillator Frequency vs. Junction Temperature Figure 25: Oscillator Frequency vs. Input Voltage 11/17 11 Page

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