LTC3308A Series

5V, 4A Synchronous Step-Down Silent Switcher in 2mm x 2mm LQFN

Catalog

5V, 4A Synchronous Step-Down Silent Switcher in 2mm x 2mm LQFN

Part	Package / Case	Supplier Device Package	Mounting Type	Topology	Voltage - Output (Min/Fixed) [Min]	Function	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Synchronous Rectifier	Voltage - Output (Max) [Max]	Output Configuration	Frequency - Switching [Min]	Frequency - Switching [Max]	Output Type	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs
Analog Devices LTC3308AMPV#TRPBF	12-VFQFN Exposed Pad	12-LQFN (2x2)	Surface Mount
Analog Devices LTC3308AMPV#TRMPBF	12-VFQFN Exposed Pad	12-LQFN (2x2)	Surface Mount	Buck	0.5 V	Step-Down	5.5 V	2.25 V		5.5 V	Positive	1 MHz	3 MHz	Adjustable	4 A	-55 °C	150 °C	1

Catalog

5V, 4A Synchronous Step-Down Silent Switcher in 2mm x 2mm LQFN

Key Features

• Pin Compatible with LTC3307(3A) and LTC3309(6A)

• High Efficiency: 8mΩ NMOS, 31mΩ PMOS

• Programmable Frequency 1MHz to 3MHzTiny Inductor and Capacitors

• Tiny Inductor and Capacitors

• Peak Current Mode Control22ns Minimum On-TimeWide Bandwidth, Fast Transient Response

• 22ns Minimum On-Time

• Wide Bandwidth, Fast Transient Response

• Silent Switcher®Architecture

• Ultralow EMI Emissions

• Low Ripple Burst Mode®Operation with IQof 40μA

• Safely Tolerates Inductor Saturation in Overload

• VINRange: 2.25V to 5.5V

• VOUTRange: 0.5V to VIN

• VOUTAccuracy: ±1% Over Temperature Range

• Precision 400mV Enable Threshold, 1μA in Shutdown

• Power Good, Internal Compensation and Soft Start

• Thermally Enhanced 2mm × 2mm LQFN Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LTC3308A is a very small, high efficiency, low noise, monolithic synchronous 4A step-down DC/DC converter operating from a 2.25V to 5.5V input supply. Using constant frequency, peak current mode control at switching frequencies 1MHz to 3MHz and minimum on-time as low as 22ns, this regulator achieves fast transient response with small external components. Silent Switcher architecture minimizes EMI emissions.The LTC3308A operates in forced continuous or pulse skip mode for low noise, or low-ripple Burst Mode operation for high efficiency at light loads, ideal for battery-powered systems. The IC regulates output voltages as low as 500mV. Other features include output overvoltage protection, short-circuit protection, thermal shutdown, clock synchronization, and up to 100% duty cycle operation for low dropout. The device is available in a low profile 12-lead 2mm × 2mm × 0.74mm LQFN package with exposed pad for low thermal resistance.APPLICATIONSOptical Networking, Servers, TelecomAutomotive, Industrial, CommunicationsDistributed DC Power Systems (POL)FPGA, ASIC, μP Core SuppliesBattery Operated Systems