Maxim Introduces MAX1809 Step-Down Converter
Maxim Integrated Products (Sunnyvale, CA) announced the MAX1809, a reversible energy flow, constant-off-time, PWM step-down converter. It is suitable for use in notebook and sub-notebook computers that require 1.1V to 5V active termination supplies.
The device accurately tracks an external reference voltage, produces an adjustable output from 1.1V to Vin, and achieves efficiencies up to 93 percent. It features a unique current-mode constant-off-time PWM control scheme that allows the output to source or sink current. The programmable constant-off-time architecture sets switching frequencies up to 1MHz, allowing the user to optimize performance trade-off between efficiency, output switching noise and component size.
The converter is offered in a 28-pin QFN and 16-pin QSOP. It is specified for operation from -40 to 85 degrees C. Pricing starts at $4.35, in minimum quantities of 1,000.
