The MAX743 DC-DC converter IC contains all the active
circuitry needed to build small, dual-output power supplies.
Relying on simple two-terminal inductors rather
than transformers, the MAX743 regulates both outputs
independently to within ±4% over all conditions of line
voltage, temperature, and load current.
The MAX743 typically provides 75% to 82% efficiency
over most of the load range. It operates with currentmode
feedback at 200kHz, so it can be used with small,
lightweight external components. Also, ripple and noise
are easy to filter.
The MAX743 is inherently reliable due to its internal power
transistors and monolithic construction. Thermal shutdown
prevents overheating, and cycle-by-cycle current
sensing protects the power-switch transistors. Other
features include undervoltage lock-out and programmable
soft-start.
Inductors, capacitors, and diodes to complement the
MAX743 can be ordered directly from Maxim in production
quantities (page 11 ). An evaluation kit for prototyping
(MAX743EVKIT) is also available (page 9).
If higher load currents are needed, refer to the MAX742
data sheet for a device that drives external power
MOSFETs.
APPLICATIONS
- DC-DC Converter Module Replacement
- Distributed Power Systems
- Computer Peripherals
- Portable Instruments
