LTC4229 Series

Ideal Diode and Hot Swap Controller

Catalog

Ideal Diode and Hot Swap Controller

Part	Mounting Type	Features	Applications	Number of Channels	Type	Current - Supply	Supplier Device Package	Programmable Features	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Min]	Voltage - Supply [Max]
Analog Devices LTC4229CUFD#TRPBF	Surface Mount	OVP UVLO	General Purpose	1	Hot Swap Controller OR Controller	2 mA	24-QFN (4x5)	Auto Retry Current Limit Fault Timeout Latched Fault	24-WFQFN Exposed Pad	70 °C	0 °C	2.9 V	18 V
Analog Devices LTC4229IG#PBF	Surface Mount	OVP UVLO	General Purpose	1	Hot Swap Controller OR Controller	2 mA	24-SSOP	Auto Retry Current Limit Fault Timeout Latched Fault	24-SSOP	85 °C	-40 °C	2.9 V	18 V
Analog Devices LTC4229IUFD#PBF	Surface Mount	OVP UVLO	General Purpose	1	Hot Swap Controller OR Controller	2 mA	24-QFN (4x5)	Auto Retry Current Limit Fault Timeout Latched Fault	24-WFQFN Exposed Pad	85 °C	-40 °C	2.9 V	18 V
Analog Devices LTC4229IG#TRPBF	Surface Mount	OVP UVLO	General Purpose	1	Hot Swap Controller OR Controller	2 mA	24-SSOP	Auto Retry Current Limit Fault Timeout Latched Fault	24-SSOP	85 °C	-40 °C	2.9 V	18 V

Catalog

Ideal Diode and Hot Swap Controller

Key Features

• Ideal Diode and Inrush Current Control forRedundant Supplies

• Low Loss Replacement for Power Schottky Diode

• Protects Output Voltage from Input Brownouts

• Allows Safe Hot Swapping from a Live Backplane

• 2.9V to 18V Operating Range

• Controls Back-to-Back N-Channel MOSFETs

• Limits Peak Fault Current in ≤1μs

• Adjustable Current Limit with Foldback

• Adjustable Start-Up and Current Limit Fault Delay

• 0.5μs Ideal Diode Turn-On and Turn-Off Time

• Undervoltage and Overvoltage Protection

• Status, Fault and Power Good Outputs

• Pin Selectable Latch Off or Automatic RetryAfter Fault

• 24-Lead 4mm × 5mm QFN and SSOP Packages

Description

The LTC4229 offers ideal diode and Hot Swap™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 foldback current limit and electronic circuit breaker.The LTC4229 regulates the forward voltage drop across the external MOSFET to ensure smooth current transfer in diode-OR applications. The ideal diode turns on quickly to reduce the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.The LTC4229 provides adjustable start-up delay, undervoltage and overvoltage protection, and reports fault and power good status for the supply. It can be configured for latch off or automatic retry after a fault.ApplicationsRedundant Power SuppliesSupply HoldupHigh Availability Systems and ServersTelecom and Network InfrastructurePower Prioritizer