l4946 STMicroelectronics, l4946 Datasheet
l4946
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l4946 Summary of contents
Page 1
... THERMAL SHUTDOWN AND LIMITATION (FOLDBACK) REVERSE BATTERY AND LOAD DUMP PROTECTION INHIBIT (ON/OFF) AND RESET FUNCTIONS DESCRIPTION The L4946 is a quad output low drop voltage regulator. The four outputs are a low drop 10V at 125mA ( 250mA ( 200mA (V ...
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... T Storage Temperature Range stg T Junction Temperature Range j Load Dump (5ms rise, 115ms decay) PIN CONNECTION APPLICATION CIRCUIT THERMAL DATA Symbol R Thermal Resistance Junction-case th j-case 2/9 Parameter Parameter uF 0.1 L4946 Parameter max Value Unit -13.5 to 26.5 V 300 mA 400 mA 600 mA 100 mA Value Unit - ...
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... Ramp V from60 to 14V in 3-5ms 7.85 amb all temps 7. -35V; t < 1ms 100 O S Check V , standard 7.85 amb all temps 7. -15V 30s 100 -0 L4946 = 4mA 0.4mA Typ. Max. Unit 10 10 10.5 V 150 400 mV 600 mV 300 ...
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... L4946 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Ripple rejection V Line Regulation O2 V across V range O2 S Output Noise (design only) V Output Voltage O3 V Line Regulation O3 V Load Regulation O3 I Quiescent Current ( Dropout Voltage Current Limit note Max Bat.Trans Rev. Voltage Trans. ...
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... The L4946 has ”Foldback” on its outputs during current limiting. As the output loading is increasing the current supplied by the L4946 increases until a threshold is reached. When the current limiting threshold is reached, the L4946 output current will start to accrease as the loading is continuoing to increase. The point where the output current stort to decrease is the maximum output current. ...
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... L4946 FUNCTIONAL DESCRIPTION The L4946 includes a monitoring circuit to warn the microprocessor if a low voltage or no voltage condition is occurring. Between 7V and 8V on the STCAP pin, the LVW output will go low. This tells the microprocessor to stop executing code and save vital information. The reset output will go low when V drops 0.15V below it’ ...
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... Below 7V the outputs are ex- pected to stay alive and ready for a return of bat- tery. The L4946 has a st-by mode to keep the micro- processor and memories allive during an ignition off conditions. The ON/OFF input pin in controlled by the microprocessor. An high on the ON/OFF pin places the part in normal mode ...
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... L4946 mm inch DIM. MIN. TYP. MAX. MIN. TYP 2. 0.039 E 0.49 0.55 0.019 F 0.88 0.95 0.035 G 1.45 1.7 1.95 0.057 0.067 0.077 G1 16.75 17 17.25 0.659 0.669 0.679 H1 19.6 0.772 H2 20.2 L 21.9 22.2 22.5 0.862 0.874 0.886 L1 21.7 22.1 22.5 0.854 0.87 L2 17.4 18.1 0.685 L3 17.25 17.5 17.75 0.679 0.689 L4 10.3 10.7 10.9 0.406 0.421 0.429 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 M1 4.73 5.08 5.43 0.186 0.200 S 1.9 2.6 0.075 S1 1.9 2.6 0.075 Dia1 3 ...
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... The ST logo is a registered trademark of STMicroelectronics 2000 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com L4946 9/9 ...