The MAX1724 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains two separate boost switching-regulator circuits. The left-side circuit contains a MAX1724 with a preset 3.3V output. Other preset voltages of 2.7V, 3.0V, or 5.0V are also available. The right-side circuit contains a MAX1722, which has an adjustable output voltage. This circuit's output is set for 3.6V. All devices regulate with input voltages from 0.91V to VOUT, making them ideal for 1- or 2-cell alkaline and NiMH battery applications.
The right-side circuit may also be used to evaluate the MAX1723, which features a shutdown (active-low SHDN) mode. The MAX1722/MAX1724 has a BATT pin, which lowers the guaranteed startup voltage from 1.2V to 0.91V.
The MAX1722/MAX1723/MAX1724 feature synchronous rectification and ultra-low (1.5µA typ) quiescent current for maximum efficiency and long battery life. Operation up to 200kHz allows tiny surface-mount components.
Key Features
Applications/Uses
0.91V to VOUT Input Voltage Range
Two Complete Boost Circuits
3.3V Fixed (MAX1724)
3.6V Adjustable Output (MAX1722)
Up to 50mA Output from a 1-Cell Input
Up to 100mA Output from a 2-Cell Input
1.5µA Quiescent Current from VOUT
Up to 90% Efficiency with Synchronous
Rectification
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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