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 (JPY) 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
4,009In 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, 140V 250mA Buck Reg
Datasheet
1,724In 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
488In 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
874In 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, 150V 100mA Sync Buck Reg
Datasheet
2,171In 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, 140V 250mA Buck Reg
Datasheet
141In Stock
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
20In Stock
2,500Expected 12/17/2026
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, 140V 250mA Buck Reg
Datasheet
72In Stock
111Expected 1/7/2027
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
6In Stock
74Expected 12/10/2026
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
13In Stock
1,443Expected 9/11/2026
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
19In Stock
1,221Expected 4/23/2027
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
59In Stock
259Expected 10/26/2026
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
Non-Stocked Lead-Time 14 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 27 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, 140V 250mA Buck Reg
Datasheet
Non-Stocked Lead-Time 28 Weeks
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, 150V 100mA Sync Buck Reg
Datasheet
Non-Stocked Lead-Time 28 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