LTC3311

RECOMMENDED FOR NEW DESIGNS

5V, 12.5A Synchronous Step-Down Silent Switcher in 3mm × 3mm LQFN

Analog Devices LTC3311 Product Info

10 February 2026 6

Features

Pin Compatible with LTC3310/LTC3310S and LTC3311S
Silent Switcher^® Architecture:

Ultralow EMI Emissions

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

Minimum On-Time: 35ns
Programmable Frequency to 5MHz
Precision 400mV Enable Threshold, 1µA in Shutdown
Output Soft-Start with Voltage Tracking
Power Good Output
Die Temperature Monitor
Configurable for Paralleling Power Stages in Forced Continuous Mode
Thermally-Enhanced 3mm × 3mm LQFN Package
AEC-Q100 Qualified for Automotive Applications

Part details & applications

The LTC3311/LTC3311-X is a very small, low noise, monolithic step-down DC/DC converter capable of providing up to 12.5A of output current from a 2.25V to 5.5V input supply. The device employs Silent Switcher 1 architecture 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 LTC3311/LTC3311-X 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.

APPLICATIONS

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

Subscribe to Welllinkchips !

Your Name

* Email