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L5991A Datasheet(PDF) 4 Page - STMicroelectronics |
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L5991A Datasheet(HTML) 4 Page - STMicroelectronics |
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4 / 23 page  6 8 20 30 V 1 4 = 0, P in2 = open Tj = 2 5 °C 04 8 1 2 16 20 24 0 0.05 0.1 0.15 0.2 4 Vc c [V ] Iq [m A ] 28 X Y Figure 1. L5991 - Quiescent current vs. input voltage. (X = 7.6V and Y= 8.4V for L5991A) 0 4 8 12 16 20 24 0 50 100 150 200 250 300 350 Vc c [ V ] Iq [µ A ] V 14 = V r e f T j = 25 ° C X Y Figure 2. L5991 - Quiescent current vs. input voltage (after disable). (X = 7.6V and Y= 8.4V for L5991A) ELECTRICAL CHARACTERISTICS (continued.) Symbol Parameter Test Condition Min. Typ. Max. Unit OUTPUT SECTION Fall Time CO = 1nF CO = 2.5nF 20 35 60 ns ns Rise Time CO = 1nF CO = 2.5nF 50 70 100 ns ns UVLO Saturation VCC = VC = 0 to VCCON; Isink = 10mA 1.0 V SUPPLY SECTION VCCON Startup voltage L5991 L5991A 14 7.8 15 8.4 16 9 V V VCCOFF Minimum Operating Voltage L5991 L5991A 9 7 10 7.6 11 8.2 V V Vhys UVLO Hysteresis L5991 L5991A 4.5 0.5 5 0.8 V V IS Start Up Current Before Turn-on at: VCC = VC = VCCON -0.5V 40 75 120 µA Iop Operating Current CT = 1nF, RT = 13.3k Ω, CO =1nF 9 13 mA Iq Quiescent Current (After turn on), CT = 1nF, RT = 13.3k Ω, CO =0nF 7.0 10 mA VZ Zener Voltage I8 = 20mA 21 25 30 V STANDBY FUNCTION VREF-VST-BY IST-BY = 2mA 45 mV VT1 Standby Threshold Vcomp Falling 2.5 V Vcomp Rising 4.0 V SYNCHRONIZATION SECTION Master Operation V1 Clock Amplitude ISOURCE = 0.8mA 4 V I1 Clock Source Current Vclock = 3.5V 3 7 mA Slave Operation V1 Sync Pulse Low Level 1 V High Level 3.5 V I1 Sync Pulse Current VSYNC = 3.5V 0.5 mA OVER CURRENT PROTECTION Vt Fault Threshold Voltage 1.1 1.2 1.3 V DISABLE SECTION Shutdown threshold 2.4 2.5 2.6 V Input Bias Current Vpin14 = 0 to 3V -1 1 µA IqSH Quiescent current After Disable VCC = 15V 330 µA L5991 - L5991A 4/23 |
Similar Part No. - L5991A |
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Similar Description - L5991A |
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