5V, 10A Synchronous Step-Down Silent Switcher 2 in 3mm × 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.

Part Number

Silent Switcher

VOUT

LTC3310S

SS2

Adjustable

LTC3310S-1

SS2

Fixed 1V

LTC3310

SS1

Adjustable

LTC3310-1

SS1

Fixed 1V

Application

* Automotive/Industrial/Communications

* Servers, Telecom Power Supplies

* Distributed DC Power Systems (POL)

* FPGA, ASIC, µP Core Supplies

* Silent Switcher®2 Architecture: Ultralow EMI Emissions (LTC3310S and LTC3310S-1)

* 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% with Remote Sense

* Peak Current Mode Control

* 35ns Minimum On-Time