MAX1640, MAX1641 Adjustable-Output, Switch-Mode Current Sources With Synchronous Rectifier

The MAX1640 MAX1641 CMOS, adjustable-output, switch-mode current sources operate from a +5.5V to +26V input, and are ideal for microprocessor-controlled Battery Chargers Charging current, maximum output voltage, and pulse-trickle charge are programmed with external resistors. Programming the off-time modifies the switching frequency, suppressing undesirable harmonics in noise-sensitive circuits. The MAX1640 's high-side current sensing allows the load to connect directly to ground, eliminating ground-potential errors. The MAX1641 incorporates a low-side Current Sense
The MAX1640 MAX1641 Step-down pulse-width-modulation (PWM) controllers use an external P-Channel MOSFET Switch and an optional, external N-Channel MOSFET synchronous Rectifier for increased efficiency. An internal low-dropout linear Regulator provides power for the internal reference and circuitry as well as the Gate drive for the N-channel synchronous Rectifier
The MAX1640 MAX1641 are available in space-saving, 16-pin narrow QSOP packages.
By Maxim Integrated Products