MAXIM MAX733EWE

The MAX732/MAX733 are CMOS step-up DC-DC switchmode regulators. The MAX732 is a +12V regulator that accepts inputs from 4.0V to 9.3V and delivers up to 200mA of DC current. The MAX733 is a +15V regulator that delivers up to 125mA and accepts inputs from 4.0V to 11.0V. Typical full-load efficiencies are 85% to 92%. They require only a single inductor value of 50μH to function over their entire ranges, so no inductor-related design is necessary. Accuracy is guaranteed over temperature, line, and load variations. The MAX732/MAX733 use a current-mode pulse-width modulation (PWM) controller to provide precise output regulation and low subharmonic noise. Typical no load supply current is 1.7mA. Fixed 170kHz oscillator frequencies allow easy filtering of ripple and noise and provide for small external components. The MAX732/MAX733 feature cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection.

• Load Currents Guaranteed to 200mA with No External MOSFET (125mA for MAX733)
• 170kHz High-Frequency Current-Mode PWM
• Small Inductor and No Component Design Required
• 85% to 92% Typical Efficiencies at Full Load
• Overcurrent and Soft-Start Protection
• 8-Pin DIP, 16-Pin Wide SO Packages
• Step-Up from a 4.0V Input
• Shutdown Pin

• Flash Memory Programming Power Supply
• Portable Instruments
• Distributed Power Systems
• Computer Peripherals
• DC-DC Converter Module Replacement