General Description
The MAX1832–MAX1835 are high-efficiency step-up converters with complete reverse battery protection that protects the device and the load when the battery is reversed. They feature a built-in synchronous rectifier, which allows for over 90% efficiency and reduces size and cost by eliminating the need for an external Schottky diode.
These step-up converters operate from a +1.5V to +5.5V input voltage range and deliver up to 150mA of load current. The MAX1833EUT/MAX1835EUT (SOT devices) have a fixed 3.3V output voltage. The MAX1833ETT30 (TDFN device) has a fixed 3.0V output voltage. The MAX1832/MAX1834 have adjustable outputs from +2V to +5.5V. In shutdown, the MAX1832/MAX1833 connect the battery input to the voltage output, allowing the input battery to be used as a backup or real-time clock supply when the converter is off (see Selector Guide).
MAX183_EUT devices are available in a miniature 6-pin SOT23 package. The MAX1833ETT30 is available in a 3mm ✕ 3mm thin DFN package. The MAX1832EVKIT is available to speed designs.

Features
♦ Reverse Battery Protection for DC-DC Converter and Load
♦ Up to 90% Efficiency
♦ No External Diode or FETs Needed
♦ Internal Synchronous Rectifier
♦ 4µA Quiescent Current
♦ <1µA Shutdown Supply Current
♦ +1.5V to +5.5V Input Voltage Range
♦ Accurate SHDN Threshold for Low-Battery Cutoff
♦ BATT Connected to OUT in Shutdown for Backup Power (MAX1832/MAX1833)
♦ RST Output (MAX1833/MAX1835)
♦ Fixed 3.3V/3.0V Output Voltage
♦ Adjustable Output Voltage (MAX1832/MAX1834)
♦ Up to 150mA Output Current
♦ Tiny 6-Pin SOT23 Package
♦ Tiny 6-Pin Thin QFN Package (MAX1833ETT30)

Applications
   Medical Diagnostic Equipment
   Pagers
   Hand-Held Instruments
   Remote Wireless Transmitters
   Digital Cameras
   Cordless Phones
   Battery Backup
   PC Cards
   Local 3.3V or 5V Supply