LTC4229
Ideal Diode and
Hot Swap Controller
Features Description Ideal Diode and Inrush Current Control for
Redundant Supplies
n Low Loss Replacement for Power Schottky Diode
n Protects Output Voltage from Input Brownouts
n Allows Safe Hot Swapping from a Live Backplane
n 2.9V to 18V Operating Range
n Controls Back-to-Back N-Channel MOSFETs
n Limits Peak Fault Current in ≤1µs
n Adjustable Current Limit with Foldback
n Adjustable Start-Up and Current Limit Fault Delay
n 0.5Вµs Ideal Diode Turn-On and Turn-Off Time
n Undervoltage and Overvoltage Protectio Status, Fault and Power Good Outputs
n Pin Selectable Latch Off or Automatic Retry
After Fault
n 24-Lead 4mm Г— 5mm QFN and SSOP Packages The LTCВ®4229 offers ideal diode and Hot Swapв„ў functions
for a power rail by controlling two external N-channel MOSFETs. The MOSFET acting as an ideal diode replaces a high
power Schottky diode and the associated heat sink, saving
power and board area. The Hot Swap MOSFET control allows a board to be safely inserted and removed from a live
backplane by limiting inrush current. The supply output is
also protected against short-circuit faults with a fast acting …