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L4972A Datasheet(PDF) 7 Page - STMicroelectronics |
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L4972A Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 22 page  7/22 L4972A I20L Out Leak Current Vi = 55V; S3 = A; V8= 0 2 mA 12 SOFT START (pin 8) I8 Soft Start Source Current V8 = 3V; V9= 0V 80 115 150 µA 13 V8 Output Saturation Voltage I8 = 20mA; V11= 10V I8= 200µA; V11= 10V 1 0.7 V V 13 13 ERROR AMPLIFIER V7H High Level Out Voltage I7 = 100µA; S1 = C; V9 = 4.7V 6 V 14 V7L Low Level Out Voltage I7 = 100µA; S1 = C; V9= 5.3V 1.2 V 14 I7H Source Output Current V7 = 1V; V7 = 4.7V 100 150 µA 14 -I7L Sink Output Current V7 = 6V; V9 = 5.3V 100 150 µA 14 I9 Input Bias Current S1 = B; RS = 10KΩ 0.4 3 µA 14 GV DC Open Loop Gain S1 = A; RS= 10Ω 60 dB 14 SVR Supply Voltage Rejection 15 < Vi < 50V 60 80 dB 14 VOS Input Offset Voltage RS= 50Ω S1 = A 2 10 mV 14 RAMP GENERATOR (pin 18) V18 Ramp Valley S1 = B; S2 = B 1.2 1.5 V 12 V18 Ramp Peak S1 = B; S2 = B Vi = 15V Vi = 45V 2.5 5.5 V V 12 12 I18 Min. Ramp Current S1 = A; I17= 100µA 270 300 µA 12 I18 Max. Ramp Current S1 = A; I17= 1mA 2.4 2.7 mA 12 SYNC FUNCTION (pin 10) V10 Low Input Voltage Vi = 15V to 50V; V8 = 0; S1 = B; S2 = B; S4 = B –0.3 0.9 V 12 V10 High Input voltage V8 = 0; S1 = B; S2 = B; S4 = B 2.5 5.5 V 12 I10L Sync Input Current with Low Input Voltage V10= V18= 0.9V; S4 = B; S1 = B; S2 = B 0.4 mA 12 I10H Input Current with High Input Voltage V10= 2.5V 1.5 mA 12 V10 Output Amplitude 4 5 V – tW Output Pulse Width Vthr = 2.5V 0.3 0.5 0.8 µs – RESET AND POWER FAIL FUNCTIONS V9R Rising Thereshold Voltage (pin 9) Vi = 15 to 50V V4 = 5.3V Vref -130 Vref -100 Vref -80 V mV 15 V9F Falling Thereshold Voltage (pin 9) Vi = 15 to 50V V4 = 5.3V 4.77 Vref -200 Vref -160 V mV 15 V2H Delay High Threshold Volt. Vi = 15 to 50V V4 = 5.3V; V9 = V13 4.95 5.1 5.25 V 15 V2L Delay Low Threshold Volt. Vi = 15 to 50V;V4 = 4.7V; V9 = V13 1 1.1 1.2 V 15 I2SO Delay Source Current V4 = 5.3V; V2 = 3V 30 60 80 µA15 I2SI Delay Source Sink Current V4 = 4.7V; V2 = 3V 10 mA 15 V3S Output Saturation Voltage I3 = 15mA; S1 = B V4 = 4.7V 0.4 V 15 I3 Output Leak Current V3 = 50V; S1 = A 100 µA15 Table 5. Electrical Characteristcs (continued) Refer to the test circuit, TJ = 25°C, Vi = 35V, R4 = 30KΩ, C9 = 2.7nF, fSW = 100KHz typ, unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit Fig. |
Similar Part No. - L4972A_05 |
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Similar Description - L4972A_05 |
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