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LTC3309A Datasheet

LTC3309A Datasheet

5V, 6A Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN
Part No.: LTC3309A
Page: 26 Pages
Size: 2214 KB
Manufacturer: Linear Technology
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Views: 0
Update Time: 2025-04-03 09:50:23
DataSheet: Download

LTC3309A Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC3309AEV#TRPBF Reel 2500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AEV#TRMPBF Reel 500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AIV#TRPBF Reel 2500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AIV#TRMPBF Reel 500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV#TRPBF Reel 2500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV#TRMPBF Reel 500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AHV#TRPBF Reel 2500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AHV#TRMPBF Reel 500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AMPV#TRPBF Reel 2500 LHFP 3 12 -55°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AMPV#TRMPBF Reel 500 LHFP 3 12 -55°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV-7#3ZZPBF Tube       18 -40°C ~ 150°C 18-Lead LQFN (3mm × 3mm × 0.94mm)  
LTC3309AJV-7#TRPBF Reel 2500 LHQH 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV-7#TRMPBF Reel 500 LHQH 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AEV#WTRPBF Reel 2500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AEV#WTRMPBF Reel 500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AIV#WTRPBF Reel 2500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AIV#WTRMPBF Reel 500 LHFP 3 12 -40°C ~ 125°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV#WTRPBF Reel 2500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV#WTRMPBF Reel 500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AHV#WTRPBF Reel 2500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AHV#WTRMPBF Reel 500 LHFP 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV-7#WTRPBF Reel 2500 LHQH 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
LTC3309AJV-7#WTRMPBF Reel 500 LHQH 3 12 -40°C ~ 150°C 12-Lead LQFN (2mm x 2mm x 0.74mm)  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC3309A Datasheet(PDF)

LTC3309A Datasheet(Picture)

LTC3309A Features

  • Pin Compatible with LTC3307(3A) and LTC3308(4A)
  • High Efficiency: 8mΩ NMOS, 31mΩ PMOS
  • Programmable Frequency 1MHz to 3MHz
    • Tiny Inductor and Capacitors
  • Peak Current Mode Control
    • 22ns Minimum On-Time
    • Wide Bandwidth, Fast Transient Response
  • Silent Switcher® Architecture
    • Ultralow EMI Emissions
  • Low Ripple Burst Mode® Operation with IQ of 40µA
  • Safely Tolerates Inductor Saturation in Overload
  • VIN Range: 2.25V to 5.5V
  • VOUT Range: 0.5V to VIN 
  • VOUT Accuracy: ±1% Over Temperature Range
  • Precision 400mV Enable Threshold, 1µA in Shutdown
  • Power Good, Internal Compensation and Soft Start
  • Thermally Enhanced 2mm × 2mm LQFN Package
  • AEC-Q100 Qualified for Automotive Applications

LTC3309A Applications

  • Optical Networking, Servers, Telecom
  • Automotive, Industrial, Communications
  • Distributed DC Power Systems (POL)
  • FPGA, ASIC, µP Core Supplies
  • Battery Operated Systems

LTC3309A Description

The LTC3309A 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 1MHz to 3MHz 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 LTC3309A 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 overvoltage protection, short-circuit protection, thermal shutdown, 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.

For applications that require a faster power on, the LTC3309A-7 has a reduced power on and soft-start time.

LTC3309A Related Parts

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