L4949 Motorola, L4949 Datasheet
L4949
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L4949 Summary of contents
Page 1
... Advanced Information Multifunction Very Low Dropout Voltage Regulator The L4949 is a monolithic integrated 5.0 V voltage regulator with a very low dropout and additional functions such as power–on reset and input voltage sense designed for supplying the micro–computer controlled systems especially in automotive applications. ...
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... out = 35 mA) Line Regulation (6.0 V < < out = 1.0 mA) Load Regulation (1.0 mA < I out < 100 mA) Current Limit V out = 4 out = 0 V Quiescent Current (I out = 0.3 mA < 100 C) Quiescent Current (I out = 100 mA) 2 L4949 Symbol Value Unit ...
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... Figure 1. Output Voltage versus Junction Temperature 5. out = 1.0 mA 5.02 5.0 4.98 4.96 –40 – JUNCTION TEMPERATURE ( C) MOTOROLA ANALOG IC DEVICE DATA L4949 Symbol V Resth V Resth,hys t ResD t ResR 3 ResL I ResH V CTth V CTth, hys V SOth V SOth,hys V SOL I SOH PIN FUNCTION DESCRIPTION Description Figure 2 ...
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... I out , OUTPUT CURRENT (mA) Figure 7. Reset Output versus Regulator Output Voltage 6 5.0 Resistor 10 k from Reset Output 4.0 to 5.0 V 3.0 2.0 1.0 0 4.0 4.1 4.2 4.3 4.4 4.5 4.6 V out , OUTPUT VOLTAGE (V) 4 L4949 (continued) Figure 4. Dropout Voltage versus 0.40 0.30 0.20 0.10 0 100 –40 –20 Figure 6. Quiescent Current versus 3 2.5 2.0 1.5 1.0 0.5 0 100 0 5.0 Figure 8. Reset Thresholds versus 4 ...
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... V/ s. For supply voltages V bat Regulator NOTES: 1. For stability 1 4.7 F, ESR < Recommended for application MOTOROLA ANALOG IC DEVICE DATA L4949 Figure 10. Sense Thresholds versus 1.4 1.38 1.36 Upper Threshold 1.34 1.32 1.3 1.28 1.26 Lower Threshold 1.24 1.22 1.2 1 ...
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... The L4949 is a monolithic integrated low dropout voltage regulator. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems in automotive applications. Nevertheless suitable also in other applications where the present functions are required. The modular approach of this device allows the use of other features and functions independently when required ...
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... V – Reg MOTOROLA ANALOG IC DEVICE DATA L4949 Standby output voltage drops below the reset threshold only a bit longer than the reaction time results in a shorter reset delay time. The nominal reset delay time will be generated for standby output voltage drops longer than approximately 50 s. The typical reset output waveforms are shown in Figure 16 ...
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... MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE MOLD PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE B DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS DIM MIN MAX A 1.35 1.75 A1 0.10 0.25 B 0.35 0.49 C 0.18 0.25 D 4.80 5.00 E 3.80 4.00 e 1.27 BSC H 5.80 6.20 h 0.25 0.50 L 0.40 1. Mfax is a trademark of Motorola, Inc. L4949/D MOTOROLA ANALOG IC DEVICE DATA ...