L4947 - Brand New STMicroelectronics Linear Voltage Regulators
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Description
The L4947/L4947R is a monolithic integrated circuit in Pentawatt package specially designed to provide a stabilized supply voltage for automotive and industrial electronic systems. Thanks to its very low voltage drop, in automotive applications the L4947/L4947R can work correctly even during the cranking phase, when the battery voltage could fall as low as 6V. Furthermore, it incorporates a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car. The reset function makes the device particularly suited to supply microprocessor based systems : a signal is available (after an externally programmable delay) to reset the microprocessor at power-on phase ; at power-off, this signal becomes low inhibiting the microprocessor.
Specifications and features
■ PRECISE OUTPUT VOLTAGE (5V ± 4%) OVER FULL TEMPERATURE RANGE (– 40 / 125 °C)
■ VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL TEMPERATURE RANGE
■ OUTPUT CURRENT UP TO 500mA
■ RESET FUNCTION
■ POWER-ON RESET DELAY PULSE DEFINED BY THE EXTERNAL CAPACITOR
■ + 80V LOAD DUMP PROTECTION
■ – 80V LOAD DUMP PROTECTION
■ REVERSE VOLTAGE PROTECTION
■ SHORT CIRCUIT PROTECTION AND THERMAL SHUT-DOWN (with hysteresis)
■ LOW START UP CURRENTApplication Scenarios
The L4947/L4947R is commonly used in automotive and industrial electronic systems to provide a stabilized supply voltage. It is particularly suitable for microprocessor-based systems, as it has a reset function that can be programmed to reset the microprocessor at power-on phase. It also offers a range of protection circuits against overvoltages and has low start-up current.
Comparison
Advantages1. Very low voltage drop over a wide temperature range.
2. Can work correctly even during the cranking phase with low battery voltage.
3. Incorporates a complete range of protection circuits against overvoltages.
4. Reset function for microprocessor-based systems.Disadvantages1. Not suitable for applications requiring higher output current than 500mA.
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Similar parts: 15024 , Click to view
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Datasheet
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Shopping guide
Delivery period:
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Popular parts of the same kind
- Datasheet: Download L4947
- Chipdatas Part: CD93-L4947
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/13 01:06 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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