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L4949 Datasheet(PDF) 3 Page - ON Semiconductor |
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L4949 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 8 page L4949 3 MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, –40°C < TJ < 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 @ TJ = 25°C 50 100 200 @ TJ = –40 to +125°C 50 – 300 Reset Pulse Delay (CT = 100 nF, tR ≥ 100 µs) tResD 55 100 180 ms Reset Reaction Time (CT = 100 nF) tResR – 5.0 30 µs Reset Output Low Voltage (RReset = 10 kΩ to Vout, VCC ≥ 3.0 V) VResL – – 0.4 V Reset Output High Leakage Current (VReset = 5.0 V) IResH – – 1.0 µA 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 VSOL – – 0.4 V (VSI ≤ 1.16 V, VCC ≥ 3.0 V, RSO = 10 kΩ to Vout) Sense Output Leakage (VSO = 5.0 V, VSI ≥ 1.5 V) ISOH – – 1.0 µA Sense Input Current ISI –1.0 0.1 1.0 µA PREREGULATOR Preregulator Output Voltage (IZ = 10 µA) VZ – 6.3 – V PIN FUNCTION DESCRIPTION Pin Symbol Description 1 VCC Supply Voltage 2 Si Input of Sense Comparator 3 VZ Output of Preregulator 4 CT Reset Delay Capacitor 5 Gnd Ground 6 Reset Output of Reset Comparator 7 SO Output of Sense Comparator 8 Vout Main Regulator Output 4.96 4.98 5.0 5.02 5.04 –40 –20 0 40 60 20 100 120 TJ, JUNCTION TEMPERATURE (°C) 80 VCC = 14 V Iout = 1.0 mA 0 2.0 3.0 4.0 6.0 010 VCC, SUPPLY VOLTAGE (V) 1.0 1.0 TJ = 25°C RL = 100 Ω RL = 5.0 k 5.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Figure 1. Output Voltage versus Junction Temperature Figure 2. Output Voltage versus Supply Voltage TYPICAL CHARACTERIZATION CURVES |
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