Analog Devices LT3759EMSE | Demoboard DC1725A

Description

The LT3759 is a current mode DC/DC controller operating over an input range of 1.6V to 42V, making it well suited for applications ranging from single-cell lithium-ion battery portable electronics to high voltage automotive and industrial power supplies. It also exhibits low shutdownquiescent current of 1μA, making it an ideal fit for battery operated systems. Thanks to a novel FBX pin architecture, the LT3759 can be connected directly to a divider from either a positive or negative output feedback voltage toground. It also packs many popular features such as softstart, input undervoltage lockout, adjustable frequency and synchronization in a small 12-lead exposed pad MSOP package.

Demonstration circuit 1725A features LT3759 in a 485kHz boost converter, designed for a 5V/2A output from a 1.8V to 4.5V input. The demo circuit configures the shutdown voltage at typical 1.70V, which means that the input voltage can be dropped to as low as 1.70V, once it starts up.The start-up voltage is set at 2.5V but can be adjusted by changing R1 and R2 values.

The LT3759 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide.

More information

• Datasheet
• IC product information