MAX1832 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – High-Efficiency Step-Up Converters with Reverse Battery Protection

19-1802; Rev 1; 10/03
EVAALVUAAILTAIOBNLEKIT
High-Efficiency Step-Up Converters with
Reverse Battery Protection
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 cur-
rent. 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 bat-
tery 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.
________________________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
Pin Configurations
TOP VIEW
SHDN 1
6 FB (RST) SHDN 1
6 RST
MAX1832
BATT 2 _MAX1834 5 OUT
(MAX1833EUT)
(MAX1835)
GND 3
4 LX
MAX1833ETT
BATT 2
5 OUT
GND 3
4 LX
SOT23
TDFN
3mm ✕ 3mm
Features
o Reverse Battery Protection for DC-DC Converter
and Load
o Up to 90% Efficiency
o No External Diode or FETs Needed
o Internal Synchronous Rectifier
o 4µA Quiescent Current
o <1µA Shutdown Supply Current
o +1.5V to +5.5V Input Voltage Range
o Accurate SHDN Threshold for Low-Battery Cutoff
o BATT Connected to OUT in Shutdown for Backup
Power (MAX1832/MAX1833)
o RST Output (MAX1833/MAX1835)
o Fixed 3.3V/3.0V Output Voltage
o Adjustable Output Voltage (MAX1832/MAX1834)
o Up to 150mA Output Current
o Tiny 6-Pin SOT23 Package
o Tiny 6-Pin Thin QFN Package (MAX1833ETT30)
Ordering Information
PART
MAX1832EUT-T
MAX1833EUT-T
MAX1833ETT30-T
MAX1834EUT-T
MAX1835EUT-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN -
PA C K A G E
6 SOT23-6
6 SOT23-6
6 TDFN-6
6 SOT23-6
6 SOT23-6
TOP
MARK
AAOT
AAOU
ABX
AAOV
AAOW
PART
MAX1832EUT-T
MAX1833EUT-T
MAX1833ETT30-T
MAX1834EUT-T
MAX1835EUT-T
Selector Guide
OUTPUT
VOLTAGE
Adjustable
Fixed 3.3V
Fixed 3.0V
Adjustable
Fixed 3.3V
OUTPUT VOLTAGE
IN SHUTDOWN
V_BATT
V_BATT
V_BATT
V_BATT - 0.7V
V_BATT - 0.7V
________________________________________________________________ Maxim Integrated Products 1
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1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.