Voltage Regulators - Switching Regulators

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LT3999 DC-DC Transformer Driver

Analog Devices Inc. LT3999 DC-DC Transformer Driver is a monolithic, high-voltage, high-frequency, push-pull DC-DC driver designed to provide isolated power in a small solution footprint. The LT3999 includes functions such as duty cycle control, soft start, and protection features such as overvoltage lockout (OVLO), undervoltage lockout (UVLO), and thermal shutdown. The LT3999 has two 1A current limited power switches that switch out of phase. The duty cycle is programmable to adjust the output voltage. The switching frequency is programmed up to 1MHz and can be synchronized to an external clock for more accurate placement of switcher harmonics.

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Part #

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999EDD#TRPBF
Analog Devices
1: S/32.81
548In Stock

Mfr. Part #
LT3999EDD#TRPBF

Mouser Part #
584-LT3999EDD#TRPBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

548In Stock

Cut Tape

S/32.81

S/28.57

S/26.51

S/25.34

View

Reel

S/21.41

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

DFN-10

Push-Pull

Adjustable

1 A

1 Output

1 MHz

- 40 C

+ 125 C

LT3999

Reel, Cut Tape, MouseReel

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999HMSE#TRPBF
Analog Devices
1: S/39.66
2,351In Stock

Mfr. Part #
LT3999HMSE#TRPBF

Mouser Part #
584-LT3999HMSE#TRPBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

2,351In Stock

Cut Tape

S/39.66

S/34.41

S/32.00

S/30.09

View

Reel

S/25.96

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 40 C

+ 150 C

LT3999

Reel, Cut Tape, MouseReel

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999EDD#PBF
Analog Devices
1: S/32.81
410In Stock

Mfr. Part #
LT3999EDD#PBF

Mouser Part #
584-LT3999EDD#PBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

410In Stock

S/32.81

S/28.42

S/26.39

S/24.68

View

Min.: 1
Mult.: 1

SMD/SMT

DFN-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 40 C

+ 125 C

LT3999

Tube

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999EMSE#PBF
Analog Devices
1: S/32.81
1,632In Stock

Mfr. Part #
LT3999EMSE#PBF

Mouser Part #
584-LT3999EMSE#PBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

1,632In Stock

S/32.81

S/28.14

S/26.86

S/25.73

View

Min.: 1
Mult.: 1

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 40 C

+ 125 C

LT3999

Tube

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999EMSE#TRPBF
Analog Devices
1: S/32.81
2,391In Stock

Mfr. Part #
LT3999EMSE#TRPBF

Mouser Part #
584-LT3999EMSE#TRPBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

2,391In Stock

Cut Tape

S/32.81

S/28.42

S/26.39

S/24.80

View

Reel

S/20.55

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

1 MHz

- 40 C

+ 125 C

LT3999

Reel, Cut Tape, MouseReel

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999HMSE#PBF
Analog Devices
1: S/42.66
1,075In Stock
50Expected 8/12/2026

Mfr. Part #
LT3999HMSE#PBF

Mouser Part #
584-LT3999HMSE#PBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

1,075In Stock

50Expected 8/12/2026

S/42.66

S/34.06

S/32.97

S/29.54

View

Min.: 1
Mult.: 1

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 40 C

+ 150 C

LT3999

Tube

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999IMSE#PBF
Analog Devices
1: S/36.67
1,591In Stock
485On Order

Mfr. Part #
LT3999IMSE#PBF

Mouser Part #
584-LT3999IMSE#PBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

1,591In Stock

485On Order

S/36.67

S/31.22

S/29.39

S/26.90

View

Min.: 1
Mult.: 1

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 40 C

+ 125 C

LT3999

Tube

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999IDD#PBF
Analog Devices
1: S/36.67
20In Stock

Mfr. Part #
LT3999IDD#PBF

Mouser Part #
584-LT3999IDD#PBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

20In Stock

S/36.67

S/31.68

S/29.43

S/26.94

View

Min.: 1
Mult.: 1

SMD/SMT

DFN-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 40 C

+ 125 C

LT3999

Tube

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999MPMSE#PBF
Analog Devices
1: S/86.45
11In Stock

Mfr. Part #
LT3999MPMSE#PBF

Mouser Part #
584-LT3999MPMSE#PBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

11In Stock

S/86.45

S/75.98

S/73.22

S/69.36

View

Min.: 1
Mult.: 1

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

100 nA

1 MHz

- 55 C

+ 150 C

LT3999

Tube

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999IMSE#TRPBF
Analog Devices
1: S/36.67
5In Stock

Mfr. Part #
LT3999IMSE#TRPBF

Mouser Part #
584-LT3999IMSE#TRPBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

5In Stock

Cut Tape

S/36.67

S/31.80

S/29.54

S/27.79

View

Reel

S/23.43

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

1 MHz

- 40 C

+ 125 C

LT3999

Reel, Cut Tape, MouseReel

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999IDD#TRPBF
Analog Devices
2,500: S/23.16
Non-Stocked Lead-Time 14 Weeks

Mfr. Part #
LT3999IDD#TRPBF

Mouser Part #
584-LT3999IDD#TRPBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

Non-Stocked Lead-Time 14 Weeks

Reel

S/23.16

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

DFN-10

Push-Pull

Adjustable

1 A

1 Output

1 MHz

- 40 C

+ 125 C

LT3999

Reel

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

LT3999MPMSE#TRPBF
Analog Devices
2,500: S/60.14
Non-Stocked Lead-Time 14 Weeks

Mfr. Part #
LT3999MPMSE#TRPBF

Mouser Part #
584-LT3999MPMSETRPBF

Analog Devices

Switching Voltage Regulators L N, 1A, 1MHz PP DC/DC Drvr w/ Duty Cycl

Learn More

Datasheet

Non-Stocked Lead-Time 14 Weeks

Reel

S/60.14

Min.: 2,500
Mult.: 2,500

: 2,500

SMD/SMT

MSOP-10

Push-Pull

Adjustable

1 A

1 Output

1 MHz

- 55 C

+ 150 C

LT3999

Reel

LT3999 DC-DC Transformer Driver

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