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MAX1834EUT#TG16 ,High-Efficiency Step-Up Converters with Reverse Battery ProtectionFeaturesThe MAX1832–MAX1835 are high-efficiency step-up Reverse Battery Protection for DC-DC Conve ..
MAX1836ETT33+T ,24V Internal Switch, 100% Duty Cycle, Step-Down Convertersapplications. MAX1836ETT33-T -40°C to +85°C 6 TDFN-EP* AJGFor increased output drive capability, us ..
MAX4717EUB+T ,4.5Ω/20Ω, 300MHz Bandwidth, Dual SPDT Analog Switches in UCSPfeatures one 4.5Ω R (max)ON ON0.3Ω (max) R Match (+3.0V Supply)SPDT switch and one 20Ω R (max) SPDT ..
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MAX4719EUB+ ,20Ω, 300MHz Bandwidth, Dual SPDT Analog Switch in UCSPELECTRICAL CHARACTERISTICS—Single +3V Supply(V+ = +2.7V to +3.6V, V = +1.4V, V = +0.5V, T = T to T ..
MAX471CPA ,Precision, High-Side Current-Sense AmplifiersGeneral Description ________
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MAX471CSA ,Precision, High-Side Current-Sense AmplifiersApplicationsMAX471CSA 0°C to +70°C 8 SOPortable PCs:MAX471EPA -40°C to +85°C 8 Plastic DIPNotebooks ..
MAX1832EUT-T
High-Efficiency Step-Up Converters with Reverse Battery Protection
General DescriptionThe 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.
________________________ApplicationsMedical Diagnostic Equipment
Pagers
Hand-Held Instruments
Remote Wireless Transmitters
Digital Cameras
Cordless Phones
Battery Backup
PC Cards
Local 3.3V or 5V Supply
FeaturesReverse Battery Protection for DC-DC Converter
and LoadUp to 90% EfficiencyNo External Diode or FETs NeededInternal Synchronous Rectifier4µA Quiescent Current<1µA Shutdown Supply Current+1.5V to +5.5V Input Voltage RangeAccurateSHDN 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 VoltageAdjustable Output Voltage (MAX1832/MAX1834)Up to 150mA Output CurrentTiny 6-Pin SOT23 PackageTiny 6-Pin Thin QFN Package (MAX1833ETT30)
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery Protection
Pin Configurations19-1802; Rev 1; 10/03
Ordering Information
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery Protection
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VSHDN= +1.5V, VOUT= +3.3V, VBATT= +2V, GND = 0, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
BATT, LX to GND.........................................................-6V to +6V
LX to OUT....................................................................-6V to +1V
SHDNto GND..............................................-6V to (VOUT+ 0.3V)
OUT, FB, RSTTO 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
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery Protectionand not production tested.
Note 2:Supply current into OUT. This current correlates directly to the actual battery-supply current, but is reduced in value accord-
ing to the step-up ratio and efficiency.
ELECTRICAL CHARACTERISTICS (continued)(VSHDN= +1.5V, VOUT= +3.3V, VBATT= +2V, GND = 0, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise
Typical Operating Characteristics(VOUT= +3.3V, VBATT= +2V, unless otherwise noted.) (Figure 1)
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery Protection
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery Protection in a SOT23-62ms/div
ON/OFF RESPONSEVOUT
1V/div
MAX1832/35 toc10
VBATT
1V/div
40µs/div
LOAD TRANSIENTILOAD
100mA/div
MAX1832/35 toc11
VOUT
100mV/div
40µs/div
LINE TRANSIENTVOUT
50mV/div
MAX1832/35 toc12
IOUT = 100mA, VOUT = +3.3V,
VBATT = +2.0V TO +2.5V
VBATT
500mV/div
10µs/div
SWITCHING WAVEFORMSVLX
2V/div
MAX1832/35 toc14
IOUT = 40mA, VOUT = +3.3V, VBATT = +2.0V
VLX
500mA/div
VOUT
100mV/div
Typical Operating Characteristics (continued)(VOUT= +3.3V, VBATT= +2V, unless otherwise noted.) (Figure 1)
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery ProtectionFigure 1a. MAX1833/MAX1835 Typical Operating CircuitFigure 1b. MAX1832/MAX1834 Typical Operating Circuit
