LTC3310S: 5V, 10A Synchronous Step-Down Silent Switcher 2 in 3mm x 3mm LQFN

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. The device is available in a compact 18-lead 3mm × 3mm LQFN package.


0719 LTC3310S block diagram-acl

 0719 LTC3310S graph-pg0719 LTC3310S grid-pc

0719 Noise Chart LTC3310

Key Features and Benefits

- Silent Switcher®2 Architecture: Ultralow EMI Emissions
- High Efficiency: 4.5mΩ NMOS and 16mΩ PMOS
- Wide Bandwidth, Fast Transient Response
- Safely Tolerates Inductor Saturation in Overload
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- VOUT Accuracy: ±1%
- 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 

General Applications

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

Evaluation Board

YES — The LTC3310S can be evaluated with the DC2629A.

See related product


Analog Devices DC to DC Converter and Switching Regulator Chip View

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Analog Devices DC to DC Converter and Switching Regulator Chip View

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Analog Devices Power Management Development Boards and Kits View


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