LTC3308B Series

5V, 4A, 10MHz Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN

Catalog

5V, 4A, 10MHz Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN

Part	Voltage - Input (Max) [Max]	Function	Output Configuration	Supplier Device Package	Number of Outputs	Voltage - Output (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Voltage - Input (Min) [Min]	Output Type	Voltage - Output (Min/Fixed) [Min]	Mounting Type	Package / Case	Current - Output	Frequency - Switching [Max]	Frequency - Switching [Min]
Analog Devices LTC3308BMPV#TRMPBF	5.5 V	Step-Down	Positive	12-LQFN (2x2)	1	5.5 V	-55 °C	150 °C	Buck	2.25 V	Adjustable	0.5 V	Surface Mount	12-VFQFN Exposed Pad	4 A	10 MHz	3 MHz
Analog Devices LTC3308AMPV#TRPBF				12-LQFN (2x2)									Surface Mount	12-VFQFN Exposed Pad
Analog Devices LTC3308AMPV#TRMPBF	5.5 V	Step-Down	Positive	12-LQFN (2x2)	1	5.5 V	-55 °C	150 °C	Buck	2.25 V	Adjustable	0.5 V	Surface Mount	12-VFQFN Exposed Pad	4 A	3 MHz	1 MHz
Analog Devices LTC3308BMPV#TRPBF	5.5 V	Step-Down	Positive	12-LQFN (2x2)	1	5.5 V	-55 °C	150 °C	Buck	2.25 V	Adjustable	0.5 V	Surface Mount	12-VFQFN Exposed Pad	4 A	10 MHz	3 MHz

Catalog

5V, 4A, 10MHz Synchronous Step-Down Silent Switcher in 2mm × 2mm LQFN

Key Features

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

• High Efficiency: 8mΩ NMOS, 31mΩ PMOS

• Programmable Frequency 3MHz to 10MHz

• Tiny Inductor and Capacitors

• Peak Current Mode Control

• 22ns Minimum On-Time

• Wide Bandwidth, Fast Transient Response

• Silent Switcher®Architecture

• Ultralow EMI Emissions

• Low Ripple Burst Mode®Operation with IQ of 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 LTC3308B 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 3MHz to 10MHz 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 LTC3308B operates in forced continuous or pulse-skipping 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 LTC3308B 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 Supplies