LTC3310S Datasheet

• Silent Switcher^®2 Architecture: Ultralow EMI Emissions (LTC3310S)
• High Efficiency: 4.5mΩ NMOS and 16mΩ PMOS
• Wide Bandwidth, Fast Transient Response
• Safely Tolerates Inductor Saturation in Overload
• V_IN Range: 2.25V to 5.5V
• V_OUT Range: 0.5V to V_IN
• V_OUT Accuracy: ±1% with Remote Sense
• Peak Current Mode Control
• 35ns Minimum On-Time
• Programmable Frequency to 5MHz
• Shutdown Current: 1µA
• Precision 400mV Enable Threshold
• Output Soft-Start with Voltage Tracking
• Power Good Output
• Die Temperature Monitor
• Configurable for Paralleling Power Stages
• Thermally-Enhanced 3mm × 3mm LQFN Package
• AEC-Q100 Qualified for Automotive Applications

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

The LTC3310S is a very small, low noise, monolithic step-down DC/DC converter capable of providing up to 10A of output current from a 2.25V to 5.5V input supply. The device employs Silent Switcher 2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency at switching frequencies as high as 5MHz. For systems with higher power requirements, multi-phasing parallel converters is readily implemented.

The LTC3310S uses a constant-frequency, peak current mode control architecture for fast transient response. A 500mV reference allows for low voltage outputs. 100% duty cycle operation delivers low drop out.

Other features include a power good signal when the output is in regulation, precision enable threshold, output overvoltage protection, thermal shutdown, a temperature monitor, clock synchronization, mode selection and output short circuit protection.