LTC4226 Series

Wide Operating Range Dual Hot Swap Controller

Catalog

Wide Operating Range Dual Hot Swap Controller

Part	Package / Case	Number of Channels [custom]	Current - Supply	Features	Supplier Device Package	Programmable Features	Applications	Type	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Voltage - Supply [Max]	Voltage - Supply [Min]
Analog Devices LTC4226IMS-1#TRPBF	16-TFSOP	2	700 µA	Latched Fault UVLO	16-MSOP	Circuit Breaker Current Limit Fault Timeout OVP	General Purpose	Hot Swap Controller	85 °C	-40 °C	Surface Mount	44 V	4.5 V
Analog Devices LTC4226IUD-1#PBF	16-WFQFN Exposed Pad	2	700 µA	Latched Fault UVLO	16-QFN (3x3)	Circuit Breaker Current Limit Fault Timeout OVP	General Purpose	Hot Swap Controller	85 °C	-40 °C	Surface Mount	44 V	4.5 V
Analog Devices LTC4226CMS-2#TRPBF	16-TFSOP	2	700 µA	Auto Retry UVLO	16-MSOP	Circuit Breaker Current Limit Fault Timeout OVP	General Purpose	Hot Swap Controller	70 °C	0 °C	Surface Mount	44 V	4.5 V
Analog Devices LTC4226IMS-1#PBF	16-TFSOP	2	700 µA	Latched Fault UVLO	16-MSOP	Circuit Breaker Current Limit Fault Timeout OVP	General Purpose	Hot Swap Controller	85 °C	-40 °C	Surface Mount	44 V	4.5 V
Analog Devices LTC4226CUD-2#PBF	16-WFQFN Exposed Pad	2	700 µA	Auto Retry UVLO	16-QFN (3x3)	Circuit Breaker Current Limit Fault Timeout OVP	General Purpose	Hot Swap Controller	70 °C	0 °C	Surface Mount	44 V	4.5 V
Analog Devices LTC4226CUD-1#TRPBF	16-WFQFN Exposed Pad	2	700 µA	Latched Fault UVLO	16-QFN (3x3)	Circuit Breaker Current Limit Fault Timeout OVP	General Purpose	Hot Swap Controller	70 °C	0 °C	Surface Mount	44 V	4.5 V

Catalog

Wide Operating Range Dual Hot Swap Controller

Key Features

• Allows Safe Board Insertion into Live Backplane

• Selectable Current Limit and Dual-Rate Timer Accommodate Load Surges

• Fast Response Limits Peak Fault Current

• Wide Operating Voltage Range: 4.5V to 44V

• Optional Auto-Retry or Latchoff after Overcurrent Fault

• High Side Drive for External N-Channel MOSFET

• Allows Parallel Power Paths for High Current Applications

• Available in 16-Pin QFN (3mm × 3mm) and MSOP Packages

Description

The LTC4226 dual Hot Swap™controller allows two power paths to be safely inserted and removed from a live backplane or powered connector. Using N-channel pass transistors, supply voltages ranging from 4.5V to 44V are ramped up at an adjustable rate.Three selectable ratios of current limit to circuit breaker threshold accommodate noisy loads and momentary high peak currents without interruption, while a dual-rate fault timer protects the MOSFET from extended output overcurrent events.FAULToutputs indicate the circuit breaker status.The LTC4226-1 remains off after a fault while the LTC4226-2 automatically retries after a 0.5s delay.The LTC4226 can also be configured as a bidirectional current limiter/circuit breaker. For high current applications, two channels may be configured as parallel power paths.ApplicationsApple FireWire/IEEE 1394Disk DrivesRugged 12V, 24V ApplicationsHot Board/Connector InsertionUni/Bidirectional Current Limiter/Circuit Breaker