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L4949DR2 Datasheet(PDF) 3 Page - ON Semiconductor |
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L4949DR2 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 10 page L4949, NCV4949 http://onsemi.com 3 ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, −40°C < TA < 125°C, unless otherwise specified.) Characteristic Unit Max Typ Min Symbol RESET Reset Threshold Voltage VResth − Vout − 0.5 − V Reset Threshold Hysteresis VResth,hys mV @ TA = 25°C 50 100 200 @ TA = −40 to +125°C 50 − 300 Reset Pulse Delay (CT = 100 nF, tR ≥ 100 ms) tResD 55 100 180 ms Reset Reaction Time (CT = 100 nF) tResR − 5.0 30 ms Reset Output Low Voltage (RReset = 10 kW to Vout, VCC ≥ 3.0 V) VResL − − 0.4 V Reset Output High Leakage Current (VReset = 5.0 V) IResH − − 1.0 mA Delay Comparator Threshold VCTth − 2.0 − V Delay Comparator Threshold Hysteresis VCTth, hys − 100 − mV SENSE Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V) VSOth 1.16 1.23 1.35 V Sense Threshold Hysteresis VSOth,hys 20 100 200 mV Sense Output Low Voltage (VSI ≤ 1.16 V, VCC ≥ 3.0 V, RSO = 10 kW to Vout) VSOL − − 0.4 V Sense Output Leakage (VSO = 5.0 V, VSI ≥ 1.5 V) ISOH − − 1.0 mA Sense Input Current ISI −1.0 0.1 1.0 mA PREREGULATOR Preregulator Output Voltage (IZ = 10 mA) VZ − 6.3 − V PIN FUNCTION DESCRIPTION Pin SOIC−8, PDIP−8 Pin SOIC−20W Symbol Description 1 19 VCC Supply Voltage 2 20 Si Input of Sense Comparator 3 1 VZ Output of Preregulator 4 2 CT Reset Delay Capacitor 5 4 − 7, 14 − 17 GND Ground 6 10 Reset Output of Reset Comparator 7 11 SO Output of Sense Comparator 8 12 Vout Main Regulator Output − 3, 8, 9, 13, 18 NC No Connect |
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