器件名称: LM5069
功能描述: Positive High Voltage Hot Swap / Inrush Current Controller with Power Limiting
文件大小: 1006.92KB 共22页
简 介:LM5069 Positive High Voltage Hot Swap / Inrush Current Controller with Power Limiting
March 5, 2008
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 NChannel MOSFET are programmable, ensuring operation 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 programmable, as well as the initial insertion delay time and fault detection time. The LM5069-1 latches off after a fault detection, while the LM5069-2 automatically restarts at a fixed duty cycle. The LM5069 is available in a 10 pin MSOP package.
■ Adjustable current limit ■ Circuit breaker function for severe over-current events ■ Internal high side charge pump and gate driver for external
N-channel MOSFET
■ Adjustable under-voltage lockout (UVLO) and hysteresis ■ Adjustable over-voltage lockout (OVLO) and hysteresis ■ Initial insertion timer allows ringing and transients to
subside after system connection ■ Programmable fault timer avoids nuisance trips ……
