lm5067mmx-2 National Semiconductor Corporation, lm5067mmx-2 Datasheet
lm5067mmx-2
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lm5067mmx-2 Summary of contents
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... In-rush current limit for safe board insertion into live power sources ■ Programmable maximum power dissipation in the external pass device Typical Application © 2007 National Semiconductor Corporation ■ Adjustable current limit ■ Circuit breaker function for severe over-current events ■ Adjustable under-voltage lockout (UVLO) and hysteresis ■ ...
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... Connection Diagrams Top View 10-Lead MSOP Ordering Information Order Number Fault Response LM5067MM-1 Latch Off LM5067MMX-1 Latch Off LM5067MM-2 Auto Restart LM5067MMX-2 Auto Restart LM5067SD-1 Latch Off LM5067SDX-1 Latch Off LM5067SD-2 Auto Restart LM5067SDX-2 Auto Restart Pin Descriptions Pin Name Description ...
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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. Current into VCC (100 µs pulse) OUT, PGD to VEE UVLO, OVLO to VEE SENSE to VEE ESD Rating ...
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Symbol Parameter Current Limit V Threshold voltage CL t Response time CL Circuit Breaker V Threshold voltage CB t Response time CB Power Limit (PWR Pin) PWR Power limit sense voltage (SENSE - VEE) LIM I PWR pin current PWR ...
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Typical Performance Characteristics 25°C. I vs. Operating Voltage - Disabled CC Operating Voltage vs. I OUT Pin Current vs. System Voltage Unless otherwise specified the following conditions apply vs. Operating Voltage - Enabled CC 30030904 SENSE Pin Current ...
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GATE Pull-Down Current, Circuit Breaker vs. GATE Voltage MOSFET Power Dissipation Limit vs. R UVLO, OVLO Threshold Voltage vs. Temperature www.national.com PGD Low Voltage vs. Sink Current 30030910 and R UVLO & OVLO Hysteresis Current vs. Temperature PWR S 30030912 ...
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Current Limit Threshold vs. Temperature Power Limit Threshold vs. Temperature GATE Pull-Down Current, Circuit Breaker vs. Temperature Circuit Breaker Threshold vs. Temperature 30030917 Gate Source Current vs. Temperature 30030919 PGD Pin Low Voltage vs. Temperature 30030921 7 30030918 30030920 30030922 ...
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POR Threshold vs. Temperature EN TIMER Pin Fault Detection Current vs. Temperature www.national.com TIMER Pin Thresholds vs. Temperature 30030923 30030926 8 30030925 ...
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Block Diagram FIGURE 1. Basic Application Circuit 9 30030927 30030928 www.national.com ...
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Functional Description The LM5067 is designed to control the in-rush current to the load upon insertion of a circuit card into a live backplane or other “hot” power source, thereby limiting the voltage sag on the backplane’s supply voltage, and ...
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FIGURE 3. Power Up Sequence (Current Limit only) Operating Voltage The LM5067 operating voltage is the voltage from VCC to VEE. The maximum operating voltage is set by an internal 13V zener diode. With the IC connected as shown in ...
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FIGURE 4. Gate Control Current Limit The current limit threshold is reached when the voltage across the sense resistor R (SENSE to VEE) reaches 50 mV. In the S current limiting condition, the GATE voltage is controlled to limit the ...
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Under-Voltage Lock-Out (UVLO) The series pass MOSFET (Q1) is enabled when the input supply voltage ( within the operating range defined by SYS the programmable under-voltage lockout (UVLO) and over- voltage lock-out (OVLO) levels. Typically the UVLO level ...
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SENSE to VEE. The required resistor S value is calculated from: where I is the desired current limit threshold. When the LIM voltage across R reaches 50 mV, the current limit circuit S modulates the gate ...
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FIGURE 9. Load Draws Current During Turn-On B) Turn-on with power limit and current limit: The power dissipation limit defined by the resistor at FET(LIM) the PWR pin, and the current sense resistor R Power ...
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MOSFET SELECTION It is recommended that the external MOSFET (Q1) selection be based on the following criteria: - The BV rating should be greater than the maximum DSS system voltage (V ), plus ringing and transients which can SYS occur ...
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The procedure to calculate the resistor values is as follows: - Determine the upper UVLO threshold (V Q1, and the lower UVLO threshold (V UVL - Determine the upper OVLO threshold (V Q1. - The lower OVLO threshold (V ), ...
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As an example, assume the application requires the following thresholds -22V -17V, V UVH UVL V = -58V. Therefore V = 5V, and V OVL UV(HYS) resistor values are 227 kΩ 39.1 ...
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POWER GOOD PIN During initial power up, the Power Good pin (PGD) is high until the operating voltage (VCC – VEE) increases above PGD then switches low, remaining low as the system voltage and the operating voltage increase. After Q1 ...
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PC Board Guidelines The following guidelines should be followed when designing the PC board for the LM5067: • Place the LM5067 close to the board’s input connector to minimize trace inductance from the connector to the FET. • Place R ...
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No. of MSOP-10 Layers No. of vias R θJA (°C/ N The data in the above table is based on using standard JEDEC Thermal Conductivity Test Boards based on EIA/ JEDEC standards JESD51-7 and JESD51-3. System ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted NS Package Number MUB10A NS Package Number SDA10A 22 ...
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Notes 23 www.national.com ...
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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...