LTC3307AHV#TRPBF

The LTC3307A is a very small, high efficiency, low noise, monolithic synchronous 3A 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 up 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 LTC3307A operates in forced continuous or pulse skip mode for low noise, or 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.

Applications

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

Key features

• High Efficiency: 8mΩ NMOS, 31mΩ PMOS
• Programmable Frequency 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 I₀ of 40µA
• Safely Tolerates Inductor Saturation in Overload
• V₁ₙ Range: 2.25V to 5.5V
• Vₒᵤₜ Range: 0.5V to V₁ₙ
• Vₒᵤₜ Accuracy: ±1% Over Temperature Range
• Precision 400mV Enable Threshold
• Shutdown Current: 1µA
• Power Good, Internal Compensation and Soft Start
• Thermally Enhanced 2mm × 2mm LQFN Package
• AEC-Q100 Qualified for Automotive Applications