MAX1836EUT33 Maxim, MAX1836EUT33 Datasheet

MAX1836EUT33

Manufacturer Part Number

MAX1836EUT33

Description

24V Internal Switch / 100% Duty Cycle / Step-Down Converters

Manufacturer

Maxim

Datasheets

1.MAX1836EUT33.pdf (15 pages)

2.MAX1836EUT33.pdf (13 pages)

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Download datasheet (431Kb)

The MAX1836/MAX1837 high-efficiency step-down

converters provide a preset 3.3V or 5V output voltage

from supply voltages as high as 24V. Using external

feedback resistors, the output voltage may be adjusted

from 1.25V to V

MOSFET delivers load currents up to 125mA

(MAX1836) or 250mA (MAX1837).

The unique current-limited control scheme, operating

with duty cycles up to 100%, minimizes the dropout

voltage (120mV at 100mA). Additionally, this control

scheme reduces supply current under light loads to

12µA. High switching frequencies allow the use of tiny

surface-mount inductors and output capacitors.

The MAX1836/MAX1837 step-down converters with

internal switching MOSFETs are available in 6-pin

SOT23 and 3mm x 3mm TDFN packages, making them

ideal for low-cost, low-power, space-sensitive applica-

tions. For increased output drive capability, use the

MAX1776 step-down converter that uses an internal

24V switch to deliver up to 500mA. For even higher cur-

rents, use the MAX1626/ MAX1627 step-down con-

trollers that drive an external P-channel MOSFET to

deliver up to 20W.

19-1919; Rev 3; 7/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

NOTE: HIGH-CURRENT PATHS SHOWN WITH BOLD LINES.

INPUT

4.5V TO 24V

9V Battery Systems

Notebook Computers

Distributed Power Systems

Backup Supplies

4mA to 20mA Loop Power Supplies

Industrial Control Supplies

Handheld Devices

GND

SHDN

Typical Operating Circuit

. An internal current-limited switching

________________________________________________________________ Maxim Integrated Products

MAX1836

MAX1837

24V Internal Switch, 100% Duty Cycle,

General Description

OUT

Applications

3.3V OR 5V

OUTPUT

♦ 4.5V to 24V Input Voltage Range

♦ Preset 3.3V or 5V Output

♦ Adjustable Output from 1.25V to V

♦ Output Currents Up to 125mA (MAX1836) or

♦ Efficiency Over 90%

♦ 12µA Quiescent Current

♦ 3µA Shutdown Current

♦ 100% Maximum Duty Cycle for Low Dropout

♦ Small 6-Pin SOT23 and TDFN Packages

____________________________Features

*EP = Exposed pad.

Selector Guide appears at end of data sheet.

MAX1836ETT33-T

MAX1836ETT50-T

MAX1836EUT33-T

MAX1836EUT50-T

MAX1837ETT33-T

MAX1837ETT50-T

MAX1837EUT33-T

MAX1837EUT50-T

TOP VIEW

Step-Down Converters

GND

250mA (MAX1837)

PART

MAX1836

MAX1837

SOT23

-40°C to +85°C

TEMP RANGE

Ordering Information

OUT

SHDN

Pin Configurations

GND

PIN-

PACKAGE

6 TDFN-EP*

6 SOT23-6

6 TDFN-EP*

6 SOT23-6

MAX1836

MAX1837

TDFN

MARK

AANW

AANY

AANZ

AANX

TOP

AJG

AJE

AJH

AJF

OUT

SHDN

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