LM25069

正低电压功率限制热插拔控制器

The positive hot swap controller provides intelligent control of the power supply voltage to the load during insertion and removal of circuit cards from a live system backplane or other "hot" power sources. The LM25069 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 operation within the Safe Operating Area SOA. The POWER GOOD output indicates when the output voltage is within 1.3V 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 LM25069-1 latches off after a fault detection, while the LM25069-2 automatically restarts at a fixed duty cycle. The LM25069 is available in a 10 pin VSSOP package.

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Operating R ange: +2.9V to +17V

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In-rush Current Limit for Safe Board Insertion into Live Power Sources

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Programmable Maximum Power Dissipation in the External Pass Device

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Adjustable Current Limit

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Circuit Breaker Function for Severe Over-Current Events

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Internal High Side Charge Pump and Gate Driver for External N-channel MOSFET

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Adjustable Under-Voltage Lockout UVLO and Hysteresis

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Adjustable Over-Voltage Lockout OVLO and Hysteresis

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Initial Insertion Timer Allows Ringing and Transients to Subside After System Connection

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Programmable Fault Timer Avoids Nuisance Trips

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Active High Open Drain POWER GOOD Output

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Available in Latched Fault and Automatic Restart Versions

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