The MAX1973/MAX1974 evaluation kit (EV kit) is a fully assembled and tested circuit board with separate circuits to evaluate the MAX1973 and MAX1974. Both circuits have an input voltage range of 2.6V to 5.5V. The output of the MAX1973 circuit (OUT1) is a selectable preset of 2.5V or 1.8V, or can be adjusted from 1.25V to VIN by adding external feedback resistors. The output of the MAX1974 circuit (OUT2) is a selectable preset of 1.5V or 1V, or can be adjusted from 0.75V to VIN by adding external feedback resistors. Each output can deliver 1A. The MAX1973 circuit also features jumper-selected voltage margining, which allows the output voltage to be increased or decreased by 4%, while the MAX1974 circuit features a power-OK (POK) output that indicates when the regulator output voltage is in regulation.
Key Features
Applications/Uses
Tiny 0.19in² Circuit Footprint
Ultra-Low 1.8mm Circuit Height
4.7µF Ceramic Input and Output Capacitors
2.6V to 5.5V Input Voltage Range
Up to 1A Output Current
1% Accurate Output Voltage
Built-In ±4% Logic-Controlled Voltage Margining (MAX1973)
Preset 1V, 1.5V, 1.8V, and 2.5V Outputs or
0.75V to VIN Adjustable Output
Fixed-Frequency Current-Mode PWM Operation
1.4MHz Switching Frequency—Operation Outside DSL Band
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