Rainbow-electronics MAX1835 Manual do Utilizador descarregar pdf

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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 MAX1833/MAX1835 have a fixed

+3.3V output, and 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).

The MAX1832–MAX1835 are available in a miniature 6-

pin SOT23 package. The MAX1832EVKIT is available to

shorten the design cycle.

________________________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

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 Output Voltage (MAX1833/MAX1835)

♦ Adjustable Output Voltage (MAX1832/MAX1834)

♦ Up to 150mA Output Current

♦ Tiny 6-Pin SOT23 Package

MAX1832–MAX1835

High-Efficiency Step-Up Converters with

Reverse Battery Protection in SOT23-6

________________________________________________________________ Maxim Integrated Products 1

BATT

LXGND

16FB

5 OUT

SHDN

MAX1832

MAX1834

SOT23-6

TOP VIEW

BATT

LXGND

16RST

5 OUT

SHDN

MAX1833

MAX1835

SOT23-6

Pin Configurations

19-1802; Rev 0; 10/00

EVALUATION KIT AVAILABLE

Ordering Information

PART T EM P. R A N G E

PIN-

PACKAGE

TOP

MARK

MAX1832EUT-T -40°C to +85°C 6 SOT23-6 AAOT

MAX1833EUT-T -40°C to +85°C 6 SOT23-6 AAOU

MAX1834EUT-T -40°C to +85°C 6 SOT23-6 AAOV

MAX1835EUT-T -40°C to +85°C 6 SOT23-6 AAOW

Selector Guide

PART

OUTPUT

VOLTAGE

OUTPUT VOLTAGE

IN SHUTDOWN

MAX1832EUT-T Adjustable V

BATT

MAX1833EUT-T Fixed 3.3V V

BATT

MAX1834EUT-T Adjustable V

BATT

- 0.7V

MAX1835EUT-T Fixed 3.3V V

BATT

- 0.7V

Note: Requires special solder temperature profile described in

the Absolute Maximum Ratings.

1 2 3 4 5 6 7 8 9 10

MAX1832–MAX1835 1

Resumo do Conteúdo

Página 1 - MAX1832–MAX1835

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,or visit Maxim’s website at www.maxim-ic.com.General Des

Página 2

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

Página 3

MAX1832–MAX1835High-Efficiency Step-Up Converters withReverse Battery Protection in SOT23-62 _________________________________________________________

Página 4

MAX1832–MAX1835High-Efficiency Step-Up Converters withReverse Battery Protection in SOT23-6___________________________________________________________

Página 5

Typical Operating Characteristics(VOUT= +3.3V, VBATT= +2V, unless otherwise noted.) (Figure 1)95650.1 10 1001 1000EFFICIENCY vs. LOAD CURRENT(VOUT = 5

Página 6

MAX1832–MAX1835High-Efficiency Step-Up Converters withReverse Battery Protection in a SOT23-6_________________________________________________________

Página 7

MAX1832–MAX1835High-Efficiency Step-Up Converters withReverse Battery Protection in SOT23-66 _________________________________________________________

Página 8

Detailed DescriptionThe MAX1832–MAX1835 compact, high-efficiencystep-up converters feature 4µA quiescent supply cur-rent to ensure the highest possibl

Página 9

MAX1832–MAX1835High-Efficiency Step-Up Converters withReverse Battery Protection in SOT23-68 _________________________________________________________

Página 10

MAX1832–MAX1835High-Efficiency Step-Up Converters withReverse Battery Protection in SOT23-6___________________________________________________________

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Rainbow-electronics MAX1835 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX1835. Rainbow Electronics MAX1835 User Manual Manual do Utilizador

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