Description

The ADM1170-2AUJZ is a hot swap controller designed for safely removing and inserting a printed circuit board to a live backplane. It utilizes an external N-channel power MOSFET with a current control loop to monitor the load current through a sense resistor. An internal charge pump is used to enhance the gate of the N-channel FET, and when an overcurrent condition is detected, the gate voltage is reduced to limit the current flowing through the sense resistor.

The ADM1170-2AUJZ is a versatile and reliable hot swap controller that provides protection and control for switching power systems.

Specifications and features

• Controls supply rails from 1.6 V to 16.5 V
• Supply voltage range from 2.7 V to 16.5 V
• Allows protected board removal and insertion to a live backplane
• External sense resistor provides adjustable analog current limit with circuit breaker
• Soft start controls inrush current profile
• Peak fault current limited with fast response
• Charge pumped gate drive for external N-FET switch
• Automatic retry or latch-off during current fault
• Undervoltage lockout
• 8-lead, TSOT package

Application Scenarios

• Hot swap board insertion: line cards, RAID systems
• Industrial high-side switches/circuit breakers
• Electronic circuit breakers

Comparison

• Supports a wide range of supply rails and voltages
• Provides protection for removing and inserting circuit boards
• Adjustable analog current limit with circuit breaker
• Fast response to peak fault current
• Automatically retries or latches-off during current fault

• Only available in 8-lead, TSOT package
• No other specific disadvantages