Part	Package / Case	Mounting Type	Supplier Device Package	Number of Outputs	Function	Topology	Output Configuration	Voltage - Output (Max) [Max]	Current - Output	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed) [Min]	Frequency - Switching	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Min) [Min]
Analog Devices Inc./Maxim Integrated LTC3309BIV#TRPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)
Analog Devices Inc./Maxim Integrated LTC3309BHV#TRPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)
Analog Devices Inc./Maxim Integrated LTC3309BEV#TRMPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)	2	Step-Down	Buck	Positive	5.5 V	6 A	5.5 V	0.5 V	6 MHz	Adjustable	-40 C	125 °C	2.25 V
Analog Devices Inc./Maxim Integrated LTC3309BJV#TRPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)
Analog Devices Inc./Maxim Integrated LTC3309BEV#TRPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)
Analog Devices Inc./Maxim Integrated LTC3309BIV#TRMPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)	2	Step-Down	Buck	Positive	5.5 V	6 A	5.5 V	0.5 V	6 MHz	Adjustable	-40 C	125 °C	2.25 V
Analog Devices Inc./Maxim Integrated LTC3309BHV#TRMPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)	2	Step-Down	Buck	Positive	5.5 V	6 A	5.5 V	0.5 V	6 MHz	Adjustable	-40 °C	150 °C	2.25 V
Analog Devices Inc./Maxim Integrated LTC3309BMPV#TRPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)	2	Step-Down	Buck	Positive	5.5 V	2 A	5.5 V	0.5 V	6 MHz	Adjustable	-55 °C	150 °C	2.25 V
Analog Devices Inc./Maxim Integrated LTC3309BMPV#TRMPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)	2	Step-Down	Buck	Positive	5.5 V	2 A	5.5 V	0.5 V	6 MHz	Adjustable	-55 °C	150 °C	2.25 V
Analog Devices Inc./Maxim Integrated LTC3309BJV#TRMPBF	12-VFQFN Exposed Pad	Surface Mount	12-LQFN (2x2)	2	Step-Down	Buck	Positive	5.5 V	6 A	5.5 V	0.5 V	6 MHz	Adjustable	-55 °C	150 °C	2.25 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 8.92	1m+

Description

General part information

LTC3309B Series

The LTC3309B is a very small, high efficiency, low noise, monolithic synchronous 6A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control at switching frequencies 3MHz-10MHz and minimum on-time as low as 22ns, this regulator achieves fast transient response with small external components. Silent Switcher architecture minimizes EMI emissions.The LTC3309B operates in forced continuous or pulse skip mode for low noise, or the low-ripple Burst Mode operation for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. Other features include output over-voltage protection, short-circuit protection, thermal shut-down, clock synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a low profile 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed pad for low thermal resistance.APPLICATIONSOptical Networking, Servers, TelecomAutomotive, Industrial, CommunicationsDistributed DC Power Systems (POL)FPGA, ASIC, µP Core Supplies

Documents

Technical documentation and resources

Package Drawing - 12-Lead LQFN (2mm x 2mm x 0.74mm)

Package Drawing

LTC3309B: 5V, 6A Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN Data Sheet (Rev.0)

Data Sheet

R523 Reliability Data

Reliability Data