LTC781x Synchronous Boost Buck Controllers

Analog Devices Inc. LTC781x Synchronous Boost Buck Controllers are high-performance, low quiescent current 38V and 60V DC-DC switching regulator controllers. The LTC781x Controllers drive the N-channel power MOSFET stages. The design includes independent step-up (boost) and step-down (buck) controllers. These independent boost and buck controllers can regulate two separate outputs. When cascaded, the independent boost and buck controllers regulate the output voltage from the input voltage. The input voltage can be above, below, or equal to the output voltage.

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Description Datasheet Availability Pricing (RON) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Topology
Number of Outputs
Switching Frequency
Duty Cycle - Max
Output Voltage
Output Current
Minimum Operating Temperature
Maximum Operating Temperature
Mounting Style
Package/Case
Packaging
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
70In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
30In Stock
Min.: 1
Mult.: 1

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 150 C SMD/SMT QFN-38 Tube
Analog Devices Switching Controllers 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr
Datasheet
2.247In Stock
Min.: 1
Mult.: 1

Buck 2 Output 50 kHz to 750 kHz 100 % 1 V to 60 V 105 uA - 40 C + 150 C SMD/SMT LQFP-48 Tray
Analog Devices Switching Controllers 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr
Datasheet
436In Stock
Min.: 1
Mult.: 1

Buck 2 Output 50 kHz to 750 kHz 100 % 1 V to 60 V 105 uA - 40 C + 125 C SMD/SMT LQFP-48 Tray
Analog Devices Switching Controllers 150V L IQ, 2x, 2-PhSync Buck DC/DC Cntr
Datasheet
216In Stock
Min.: 1
Mult.: 1

Buck 2 Output 50 kHz to 750 kHz 100 % 1 V to 60 V 105 uA - 40 C + 125 C SMD/SMT LQFP-48 Tray
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
73In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
6In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 150 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
156In Stock
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
2In Stock
Min.: 1
Mult.: 1

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 125 C SMD/SMT QFN-38 Tube
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
499Expected 3/27/2026
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 1
Mult.: 1

Boost, Buck 2 Output 850 kHz 800 mV to 60 V 20 A - 40 C + 150 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 800 mV to 60 V 20 A - 40 C + 150 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 38V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 150 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 40 C + 125 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 73
Mult.: 73

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 55 C + 150 C SMD/SMT QFN-32 Tube
Analog Devices Switching Controllers L IQ, 60V Sync Boost+Buck Cntr
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 2 Output 850 kHz 100 % 800 mV to 60 V 20 A - 55 C + 150 C SMD/SMT QFN-32 Reel
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
Lead-Time 10 Weeks
Min.: 1
Mult.: 1

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 125 C SMD/SMT QFN-38 Tube
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 125 C SMD/SMT QFN-38 Reel
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 150 C SMD/SMT QFN-38 Reel
Analog Devices Switching Controllers L IQ, 2.25MHz, 3x Out, Buck/Buck/Boost S
Datasheet
Non-Stocked Lead-Time 13 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

Boost, Buck 3 Output 320 kHz to 2.25 MHz 100 % 800 mV to 60 V 25 A - 40 C + 125 C SMD/SMT QFN-38 Reel