Voltage Regulators - Switching Regulators

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LTC3309A/B Synchronous Step-Down DC/DC Converters

Analog Devices Inc. LTC®3309A/B Synchronous 6A Step-Down DC/DC Converters feature Silent Switcher™ architecture designed to minimise EMI/EMC emissions. LTC3309A/B Converters are ideal for applications such as optical networking, servers, telecoms, and DC power systems. These small, high-efficiency, low-noise, monolithic synchronous converters operate from a 2.25V to 5.5V input supply. These regulators achieve fast transient response with small external components using constant frequency, peak current mode control at switching frequencies of up to 3MHz and minimum on-time as low as 22ns. These ICs regulate output voltages as low as 500mV. The devices are available in a low-profile 12-lead 2mm x 2mm x 0.74mm LQFN-12 package with exposed pad for low thermal resistance.

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Part #

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BJV#TRMPBF
Analog Devices
1: $8.09
393In Stock

Mfr. Part No.
LTC3309BJV#TRMPBF

Mouser Part No
584-3309BJVTRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

393In Stock

Cut Tape

$8.09

$6.26

$5.70

$5.30

Reel

$4.91

View

MouseReel Available

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BMPV#TRMPBF
Analog Devices
1: $14.55
203In Stock

Mfr. Part No.
LTC3309BMPV#TRMPBF

Mouser Part No
584-3309BMPVTRMPB

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

203In Stock

Cut Tape

$14.55

$11.47

$10.70

$9.87

Reel

$9.01

View

MouseReel Available

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AJV#TRMPBF
Analog Devices
1: $7.51
1,132In Stock

Mfr. Part No.
LTC3309AJV#TRMPBF

Mouser Part No
584-LTC3309AJVTRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

1,132In Stock

Cut Tape

$7.51

$5.79

$5.36

$4.90

Reel

$4.54

View

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

2 MHz

- 40 C

+ 150 C

LTC3309

Reel, Cut Tape

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AIV#TRPBF
Analog Devices
1: $7.12
3,963In Stock

Mfr. Part No.
LTC3309AIV#TRPBF

Mouser Part No
584-LTC3309AIV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

3,963In Stock

Cut Tape

$7.12

$5.45

$5.04

$4.58

View

Reel

$4.20

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BEV#TRMPBF
Analog Devices
1: $6.26
1,712In Stock

Mfr. Part No.
LTC3309BEV#TRMPBF

Mouser Part No
584-3309BEVTRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

1,712In Stock

Cut Tape

$6.26

$4.80

$4.43

$4.04

Reel

$3.72

View

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BHV#TRMPBF
Analog Devices
1: $8.59
352In Stock

Mfr. Part No.
LTC3309BHV#TRMPBF

Mouser Part No
584-3309BHVTRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

352In Stock

Cut Tape

$8.59

$6.68

$6.18

$5.65

Reel

$5.25

View

MouseReel Available

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BIV#TRMPBF
Analog Devices
1: $7.12
1,000In Stock

Mfr. Part No.
LTC3309BIV#TRMPBF

Mouser Part No
584-3309BIVTRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

1,000In Stock

Cut Tape

$7.12

$5.45

$5.04

$4.58

Reel

$4.23

View

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AHV#TRMPBF
Analog Devices
1: $7.92
39In Stock

Mfr. Part No.
LTC3309AHV#TRMPBF

Mouser Part No
584-3309AHV#TRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

39In Stock

Cut Tape

$7.92

$6.13

$5.68

$5.19

Reel

$4.72

View

MouseReel Available

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 150 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AEV#TRPBF
Analog Devices
1: $6.34
63In Stock
2,500Expected 2027/05/07

Mfr. Part No.
LTC3309AEV#TRPBF

Mouser Part No
584-LTC3309AEV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

63In Stock

2,500Expected 2027/05/07

Cut Tape

$6.34

$4.87

$4.50

$4.11

View

Reel

$3.58

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AMPV#TRMPBF
Analog Devices
1: $13.47
15In Stock

Mfr. Part No.
LTC3309AMPV#TRMPBF

Mouser Part No
584-3309AMPV#TRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

15In Stock

Cut Tape

$13.47

$10.61

$9.89

$9.11

Reel

$8.48

View

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 55 C

+ 150 C

LTC3309

Reel, Cut Tape

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AEV#TRMPBF
Analog Devices
1: $6.26
5,469Expected 2027/01/01

Mfr. Part No.
LTC3309AEV#TRMPBF

Mouser Part No
584-3309AEV#TRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

5,469Expected 2027/01/01

Cut Tape

$6.26

$4.80

$4.43

$4.04

$3.86

Reel

$3.63

MouseReel Available

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AIV#TRMPBF
Analog Devices
1: $7.18
1,000Expected 2026/12/28

Mfr. Part No.
LTC3309AIV#TRMPBF

Mouser Part No
584-3309AIV#TRMPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

1,000Expected 2026/12/28

Cut Tape

$7.18

$5.51

$5.04

$4.65

$4.45

Reel

$4.26

MouseReel Available

Min.: 1
Mult.: 1

: 500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 125 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AJV#TRPBF
Analog Devices
1: $7.51
Lead-Time 39 Weeks

Mfr. Part No.
LTC3309AJV#TRPBF

Mouser Part No
584-LTC3309AJV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Lead-Time 39 Weeks

Cut Tape

$7.51

$5.80

$5.37

$4.95

View

Reel

$4.30

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

2 MHz

- 40 C

+ 150 C

LTC3309

Reel, Cut Tape, MouseReel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AMPV#TRPBF
Analog Devices
2,500: $7.92
Non-Stocked Lead-Time 15 Weeks

Mfr. Part No.
LTC3309AMPV#TRPBF

Mouser Part No
584-3309AMPV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 15 Weeks

Reel

$7.92

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

: 2,500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 55 C

+ 150 C

LTC3309

Reel

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309AHV#TRPBF
Analog Devices
2,500: $4.62
Non-Stocked Lead-Time 39 Weeks

Mfr. Part No.
LTC3309AHV#TRPBF

Mouser Part No
584-LTC3309AHV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 39 Weeks

Reel

$4.62

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

: 2,500

SMD/SMT

LQFN-12

Buck

500 mV to 5.5 V

6 A

1 Output

1.2 mA

1 MHz to 3 MHz

- 40 C

+ 150 C

LTC3309

Reel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BEV#TRPBF
Analog Devices
2,500: $3.59
Non-Stocked Lead-Time 39 Weeks

Mfr. Part No.
LTC3309BEV#TRPBF

Mouser Part No
584-LTC3309BEV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 39 Weeks

Reel

$3.59

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

: 2,500

SMD/SMT

LQFN-12

LTC3309

Reel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BHV#TRPBF
Analog Devices
2,500: $4.99
Non-Stocked Lead-Time 39 Weeks

Mfr. Part No.
LTC3309BHV#TRPBF

Mouser Part No
584-LTC3309BHV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 39 Weeks

Reel

$4.99

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

: 2,500

SMD/SMT

LQFN-12

LTC3309

Reel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BIV#TRPBF
Analog Devices
2,500: $4.11
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
LTC3309BIV#TRPBF

Mouser Part No
584-LTC3309BIV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Reel

$4.11

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

: 2,500

SMD/SMT

LQFN-12

LTC3309

Reel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BJV#TRPBF
Analog Devices
2,500: $4.61
Non-Stocked Lead-Time 15 Weeks

Mfr. Part No.
LTC3309BJV#TRPBF

Mouser Part No
584-LTC3309BJV#TRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 15 Weeks

Reel

$4.61

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

: 2,500

SMD/SMT

LQFN-12

LTC3309

Reel

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

LTC3309BMPV#TRPBF
Analog Devices
2,500: $8.83
Non-Stocked Lead-Time 37 Weeks

Mfr. Part No.
LTC3309BMPV#TRPBF

Mouser Part No
584-LTC3309BMPVTRPBF

Analog Devices

Switching Voltage Regulators 5V, 6A, 10 MHz Synchronous Step-Down Silent Switcher in 2mm 2mm LQFN

Learn More

Datasheet

Non-Stocked Lead-Time 37 Weeks

Reel

$8.83

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

: 2,500

SMD/SMT

LQFN-12

LTC3309

Reel

LTC3309A/B Synchronous Step-Down DC/DC Converters

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