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LM5069 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM5069 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 22 page  LM5069 Positive High Voltage Hot Swap / Inrush Current Controller with Power Limiting General Description The LM5069 positive hot swap controller provides intelligent control of the power supply connections during insertion and removal of circuit cards from a live system backplane or other "hot" power sources. The LM5069 provides in-rush current control to limit system voltage droop and transients. The current limit and power dissipation in the external series pass N-Channel MOSFET are programmable, ensuring op- eration within the Safe Operating Area (SOA). The POWER GOOD output indicates when the output voltage is within 1.25V of the input voltage. The input under-voltage and over-voltage lockout levels and hysteresis are program- mable, as well as the initial insertion delay time and fault detection time. The LM5069-1 latches off after a fault detec- tion, while the LM5069-2 automatically restarts at a fixed duty cycle. The LM5069 is available in a 10 pin MSOP package. Features n Wide operating range: +9V to +80V n In-rush current limit for safe board insertion into live power sources n Programmable maximum power dissipation in the external pass device n Adjustable current limit n Circuit breaker function for severe over-current events n Internal high side charge pump and gate driver for external N-channel MOSFET n Adjustable under-voltage lockout (UVLO) and hysteresis n Adjustable over-voltage lockout (OVLO) and hysteresis n Initial insertion timer allows ringing and transients to subside after system connection n Programmable fault timer avoids nuisance trips n Active high open drain POWER GOOD output n Available in latched fault and automatic restart versions Applications n Server Backplane Systems n Base Station Power Distribution Systems n Solid State Circuit Breaker n 24V/48V Industrial Systems Package n MSOP-10 Typical Application 20197201 Positive Power Supply Control September 2006 © 2006 National Semiconductor Corporation DS201972 www.national.com |
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