lm9073 National Semiconductor Corporation, lm9073 Datasheet
lm9073
Related parts for lm9073
lm9073 Summary of contents
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... LM9073 Dual High Current Low-Dropout System Regulator General Description The LM9073 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% tolerance 5V output at 700mA with a low dropout char- acteristic ...
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Block Diagram www.national.com 2 10129603 ...
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... I = 0mA IN L ≥ 8V LTOTAL MAIN I = 700mA + 100mA = LTOTAL 800mA 3 −65˚C to 150˚C (Note 27V −40˚C to 125˚C ≥ 6µF with 0.3Ω ≤ ESR ≤ OUT LM9073 Min Max 4.9 5.1 4.8 5.2 ≤ 25 ≤ 16V 25 ≤ 2000 40 4.9 5.1 4.8 5.2 25 ≤ ...
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... WATCHDOG watchdog Rseries = 22kΩ Rseries = 22kΩ (Note 3) 1.4V ≤ V ≤ 4.5V ON/OFF −0.3V ≤ V ≤ 7V(Note 6) ON/OFF (Note 3) 0V ≤ V ≤ 5V K−A 4 ≥ 6µF with 0.3Ω ≤ ESR ≤ OUT LM9073 Units Min Max X I LTOTAL 1.5 4.0 4.2 V 4.5 4.7 V 5.35 5.75 V 0.4 V ...
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Electrical Characteristics Note 4: The input quiescent current will increase when the regulators are in dropout conditions. The amount of additional input current is a direct function of the to a load current on both outputs. The peak increase in ...
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Typical Performance Characteristics External Supply Output Short Circuit Current Watchdog and Reset Delay Time vs Temperature Output Capacitor ESR www.national.com (Continued) Output Short Circuit Current vs Temperature 10129610 Maximum Power Dissipation 10129612 10129614 6 10129611 10129613 ...
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7 www.national.com ...
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... The LM9073 is a precision dual voltage regulator optimized for use in powertrain module applications but will also find INPUT VOLTAGE (PIN 4) The LM9073 has been designed to connect directly to the ignition or battery supply in automotive applications. For this type of supply the regulator been designed to withstand up to +60V and − ...
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... EXTERNAL SUPPLY OUTPUT (PIN 5) The External Supply Output regulator is a secondary 5V, 2% tolerance regulated output of the LM9073. this 100mA output is available to bias sensors and other devices located exter- nal to the main system module. For providing remote power the External Supply Output is fully protected against short circuit connections to the battery or input supply (up to 27V) and to ground ...
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... FIGURE 3. Watchdog and Reset Operation WATCHDOG CAPACITOR (PIN 2) The LM9073 also provides a simple system watchdog timer. The watchdog timer requires the system controller to issue a pulse at a regular interval (programmable through the selec- tion of Cwatchdog) to provide an indication that the system is properly executing controlling software code ...
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... Supply outputs typical application this input is con- SYSTEM KEEP-ALIVE OPERATION Figure 5 illustrates the basic concept of Keep-Alive opera- tion. The LM9073 provides the regulated supplies to an entire microcontroller based system or module including re- mote sensors. The system is switched ON or OFF by a switch connected to the unregulated input supply and the ON/OFF input, pin 3 ...
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... Reset output from resetting the entire system and also gates the Keep-Alive input signal to the LM9073. The inverted Reset signal provides a logic 1 to the Keep-Alive input of the LM9073. The Main output will only drop out of regulation for a very short time before the Keep-Alive input turns it back on ...
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... This increase is caused by the satu- ration characteristics (β reduction) of the PNP transistor. To significantly minimize this increase in current the LM9073 detects when the PNP enters the saturation and reduces the operating current. This reduction in input current can create a stability problem ...
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... FIGURE 7. Input Bypassing THERMAL MANAGEMENT The LM9073 is packaged in 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 protection is built with a threshold above 150˚C Conventional heat sinking techniques can be used with the TO-220 package ...
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... These two pins are the most critical as they typically will connect to a module through long lengths of wire most likely to pick up high frequency energy. Figure 9 illustrates examples of test results on the LM9073 with both types of modulation. 1MHz to 400MHz These results are just examples as actual results in any ...
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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 Order Number LM9073T NS Package Number TA11B 2 ...