Analog DevicesLTC3313EV#TRPBF直流-直流转换器和开关调节器芯片

LTC3313: 5V, 15A Synchronous Step-Down Silent Switcher® in 3 mm × 3 mm LQFN

The LTC3313 is a very small, low-noise, monolithic step-down DC/DC converter capable of providing up to 15A of output current from a 2.25V to 5.5V input supply.

The LTC3313 employs the Silent Switcher architecture to achieve both low EMI and high efficiency at switching frequencies as high as 5MHz. For systems with higher power requirements, multiphasing parallel converters is readily implemented.

The LTC3313 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, a precision enable threshold, output overvoltage protection, thermal shutdown, a temperature monitor, clock synchronization, mode selection and output short circuit protection. The device is available in a compact 18-pin 3mm × 3mm LQFN package.

Key Features and Benefits

• High efficiency at 5 MHz switching frequencies
• Ultralow EMI emissions and noise with Silent Switcher® architecture
• Wide bandwidth and peak current mode control for fast transient response
• Layout Compatible with LTC3310/LTC3311 Family
• Silent Switcher® Architecture
• High Efficiency: 3mΩ NMOS and 8mΩ PMOS
• Safely Tolerates Inductor Saturation in Overload
• V_IN Range: 2.25V to 5.5V
• V_OUT Range: 0.5V to VIN
• V_OUT Accuracy: ±1% with Remote Sense
• Peak Current Mode Control
• Minimum On-Time: 35ns
• 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

Applications

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

Evaluation Board

The LTC3313 can be evaluated with the EVAL-LTC3313EV-A-Z.

Block Diagrams and Tables