LTC3371 Series

4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset

Catalog

4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset

Part	Voltage - Input (Min) [Min]	Current - Output	Voltage - Output (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Topology	Number of Outputs	Output Type	Package / Case	Frequency - Switching	Mounting Type	Supplier Device Package	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Function
Analog Devices LTC3371IFE#PBF	2.7 V	2 A	5.5 V	-40 °C	125 ¯C	Positive	Buck	4	Adjustable	38-TFSOP	2 MHz	Surface Mount	38-TSSOP-EP	5.5 V	0.8 V	Step-Down
Analog Devices LTC3371EFE#PBF	2.7 V	2 A	5.5 V	-40 °C	125 ¯C	Positive	Buck	4	Adjustable	38-TFSOP	2 MHz	Surface Mount	38-TSSOP-EP	5.5 V	0.8 V	Step-Down
Analog Devices LTC3371EFE#TRPBF	2.7 V	2 A	5.5 V	-40 °C	125 ¯C	Positive	Buck	4	Adjustable	38-TFSOP	2 MHz	Surface Mount	38-TSSOP-EP	5.5 V	0.8 V	Step-Down
Analog Devices LTC3371HFE#TRPBF	2.7 V	2 A	5.5 V	-40 °C	150 °C	Positive	Buck	4	Adjustable	38-TFSOP	2 MHz	Surface Mount	38-TSSOP-EP	5.5 V	0.8 V	Step-Down
Analog Devices LTC3371IUHF#PBF	2.7 V	2 A	5.5 V	-40 °C	125 ¯C	Positive	Buck	4	Adjustable	38-WFQFN Exposed Pad	2 MHz	Surface Mount		5.5 V	0.8 V	Step-Down
Analog Devices LTC3371HUHF#TRPBF	2.7 V	2 A	5.5 V	-40 °C	150 °C	Positive	Buck	4	Adjustable	38-WFQFN Exposed Pad	2 MHz	Surface Mount		5.5 V	0.8 V	Step-Down
Analog Devices LTC3371IFE	2.7 V	2 A	5.5 V	-40 °C	125 ¯C	Positive	Buck	4	Adjustable	38-TFSOP	2 MHz	Surface Mount	38-TSSOP-EP	5.5 V	0.8 V	Step-Down

Catalog

4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset

Key Features

• 8 × 1A Buck Power Stages Configurable as 2, 3 or 4 Output Channels

• 8 Unique Output Configurations (1A to 4A Per Channel)

• Independent VINSupplies for Each DC/DC (2.25V to 5.5V)

• Low Total No Load Supply Current:15μA In Shutdown (All Channels Off)68μA One Channel Active in Burst Mode®Operation18μA Per Additional Channel

• 15μA In Shutdown (All Channels Off)

• 68μA One Channel Active in Burst Mode®Operation

• 18μA Per Additional Channel

• Precision Enable Pin Thresholds for Autonomous Sequencing

• 1MHz to 3MHz RT Programmable Frequency (2MHz Default) or PLL Synchronization

• Temp Monitor Indicates Die Temperature

• CT Programmed Watchdog Timer

• IndependentRSTPins Indicate Buck in Regulation

• Thermally Enhanced 38-Lead 5mm × 7mm QFN and TSSOP Packages

Description

The LTC3371 is a highly flexible multi-output power supply IC. The device includes four synchronous buck converters, configured to share eight 1A power stages, each of which is powered from independent 2.25V to 5.5V inputs.The DC/DCs are assigned to one of eight possible power configurations via pin programmable C1-C3 pins. The common buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock. The operating mode for all DC/DCs may be programmed for Burst Mode or forced continuous mode operation.The CT pin programs the timing parameters of four independentRSTpins as well as the watchdog timer.To reduce input noise, the buck converters are phased in 90° steps. Precision enable pin thresholds facilitate reliable power sequencing. The LTC3371 is available in low profile 38-lead 5mm × 7mm QFN and TSSOP packages.ApplicationsGeneral Purpose Multichannel Power Supplies: Automotive, Industrial, Distributed Power Systems