lm9072 National Semiconductor Corporation, lm9072 Datasheet
lm9072
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lm9072 Summary of contents
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... LM9072 Dual Tracking Low-Dropout System Regulator General Description The LM9072 is a high performance voltage regulator system with operational and protection features that address many requirements of automotive applications. Two regulated out- puts are provided. The main regulator provides a precision 2% maximum tolerance 5V output at 350 mA with a low dropout characteristic ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage (Continuous) Input Voltage (Transient, t 400 ms) Forced Output Voltages Main Output Tracking Output ON/OFF Input Voltage ...
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Electrical Characteristics 6.0V V 19V 25˚C, unless otherwise specified CASE Symbol Parameter INPUT CURRENT Iin Additional Input Current in Dropout do RESET OUTPUT V Low Switching Threshold THRL V High Switching Threshold THRH V Logic Low ...
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Typical Performance Characteristics Turn-ON Characteristic DS012906-4 Quiescent Input Current vs Input Voltage DS012906-7 Tracking Output Short Circuit Current DS012906-10 www.national.com (T = 25˚C unless otherwise specified) A Turn-OFF Characteristic DS012906-5 Main Output Voltage at Input Voltage Extremes DS012906-8 Main Regulator ...
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Typical Performance Characteristics Reverse Battery Input Current DS012906-13 Operational Characteristics Control Logic Truth Table Main ON/OFF Keep-Alive Output Input Input Voltage < 4.45V 25˚C ...
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... The following will describe the functionality of each of the package pins. INPUT VOLTAGE (Pin 3) The LM9072 has been designed to connect directly to the ignition or battery supply in automotive applications. For this type of supply the regulator has been designed to withstand up to +60V and −45V supply transients such as load dump. ...
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Application Information RESET OUTPUT (Pin 6) The Reset Output is an active low logic signal provided to reset a system microcontroller on power up and in the event that the Main Output supply falls out of regulation. This output is ...
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... A second use of the Keep-Alive Input can be from other modules which need information from the module powered by the LM9072, Figure CMOS logic high level ( this input will power up the system as needed independent from the normal ON/OFF switch. ...
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Application Information (Continued) FIGURE 4. Basic Keep-Alive Operation 9 DS012906-20 www.national.com ...
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Application Information FIGURE 5. Simple Logic Configuration to Provide ON/OFF Sensing Safety Latch-OFF To address a system FMEA (Failure Mode Effects Analysis) issue the Keep-Alive high level should be derived from the Tracking output regulator as shown in Figure 6 ...
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... This increase is caused by the satu- IN ration characteristics ( reduction) of the PNP transistor. To significantly minimize this increase in current the LM9072 detects when the PNP enters saturation and reduces the operating current. This reduction in input current can create a stability problem in applications with higher load current ( ...
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... Application Information Thermal Management The LM9072 is packaged in both a TO-263 surface mount power package and a narrow lead-pitch TO-220 package. To obtain operation over the highest possible load current and input voltage ranges, care must be taken to control the operating temperature of the device. Thermal shutdown pro- tection is built in, with a threshold above 150˚ ...
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Application Information FIGURE 9. Bulk Current Injection Test Configuration BCI Susceptibility, Modulation 1 (CW) (Continued) BCI Susceptibility Moduiatlon 2 (1 kHz, 80% AM DS012906-26 FIGURE 10. Examples of BCI Test Results 13 DS012906-25 modulation) DS012906-27 www.national.com ...
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... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Order Number LM9072T NS Package Number TA9A 14 ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted (Continued) Order Number LM9072S NS Package Number TS9A 2 ...