MAX1832MAX1835

Reverse Battery Protection for DC-DC Converter and Load
 Up to 90% Efficiency
 No External Diode or FETs Needed
 Internal Synchronous Rectifier
 4A Quiescent Current
 <1A 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)

BATT, LX to GND..................................................................................................................................-6V to +6V
LX to OUT ...........................................................................................................................................-6V to +1V
SHDN  to GND......................................................................................................................-6V to (VOUT + 0.3V)
OUT, FB,RST   TO GND .....................................................................................................................-0.3V to +6V
LX Current .....................................................................................................................................................1A
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 9.1mW/°C above +70°C) ...................................................................................727mW
6-Pin 3mm × 3mm TDFN (derate 24.4mW/°C above +70°C) ............................................................1951mW

Operating Temperature Range ..............................................................................................-40°C to +85°C
Junction Temperature...........................................................................................................................+150°C
Storage Temperature Range ................................................................................................-65°C to +150°C
Lead Temperature (soldering, 10s) ......................................................................................................+300°C

The MAX1832MAX1835 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.