LTC3638 & LTC3639 Step-Down Regulators

Analog Devices Inc. LTC3638 and LTC3639 High-Efficiency Step-Down Regulators maintain a regulated output voltage at no load with an internal power switch at only 12μA typical DC supply current. The LTC3638 and LTC3639 incorporate low quiescent current, integrated power switch, Burst Mode® operation, and programmable peak current limit creating high efficiency over a broad range of load currents. A programmable peak current limit creates a simple method for optimizing efficiency and for reducing output ripple and component size. 

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Description Datasheet Availability Pricing (CAD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
Package / Case
Topology
Output Voltage
Output Current
Number of Outputs
Quiescent Current
Switching Frequency
Minimum Operating Temperature
Maximum Operating Temperature
Series
Packaging
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
1,695In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 55 C + 150 C LTC3639 Reel, Cut Tape, MouseReel
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
1,759In Stock
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA Adjustable - 40 C + 125 C LTC3638 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
2,500In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 40 C + 150 C LTC3639 Reel, Cut Tape, MouseReel
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
4,327In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 40 C + 125 C LTC3639 Reel, Cut Tape, MouseReel
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
498In Stock
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 40 C + 150 C LTC3639 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
120In Stock
259Expected 2026-07-10
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 55 C + 150 C LTC3639 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
200In Stock
2,500Expected 2026-11-12
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA Adjustable - 40 C + 125 C LTC3638 Reel, Cut Tape, MouseReel
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
682In Stock
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 40 C + 125 C LTC3639 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
459In Stock
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 40 C + 125 C LTC3639 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
97In Stock
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA Adjustable - 40 C + 150 C LTC3638 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
14In Stock
259Expected 2026-07-03
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA Adjustable - 55 C + 150 C LTC3638 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
11In Stock
74Expected 2026-11-03
Min.: 1
Mult.: 1

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA Adjustable - 40 C + 125 C LTC3638 Tube
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
5In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA - 40 C + 125 C LTC3638 Reel, Cut Tape, MouseReel
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2,500
Mult.: 2,500
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA - 55 C + 150 C LTC3638 Reel
Analog Devices Switching Voltage Regulators Hi Eff, 140V 250mA Buck Reg
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 2,500
Mult.: 2,500
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 140 V 250 mA 1 Output 12 uA - 40 C + 150 C LTC3638 Reel
Analog Devices Switching Voltage Regulators Hi Eff, 150V 100mA Sync Buck Reg
Datasheet
Non-Stocked Lead-Time 13 Weeks
Min.: 2,500
Mult.: 2,500
: 2,500

SMD/SMT MSOP-16-12 Buck 800 mV to 150 V 100 mA 1 Output 12 uA 200 kHz - 40 C + 125 C LTC3639 Reel