MAX1733

更新时间： 2024-09-24 22:57:59

品牌	Logo	应用领域
美信 - MAXIM		转换器
页数	文件大小	规格书
8页	266K
描述
Low-Voltage, Step-Down DC-DC Converters in SOT23

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MAX1733 数据手册

19-1586; Rev 0; 7/00

Low-Voltage, Step-Down DC-DC Converters

in SOT23

General Description

Features

The MAX1733/MAX1734 step-down DC-DC converters

deliver over 250mA to outputs as low as 1.25V. These

converters use a unique proprietary current-limited con-

trol scheme that achieves over 90% efficiency. These

devices maintain extremely low quiescent supply cur-

rent (40µA), and their high 1.2MHz (max) operating fre-

quency permits small, low-cost external components.

This combination of features makes the MAX1733/

MAX1734 excellent high-efficiency alternatives to linear

regulators in space-constrained applications.

ꢀ 250mA Guaranteed Output Current

ꢀ Synchronous Rectifier for Over 90% Efficiency

ꢀ Tiny 5-Pin SOT23 Package

ꢀ 40µA Quiescent Supply Current

ꢀ 0.01µA Logic-Controlled Shutdown

ꢀ Up to 1.2MHz Switching Frequency

ꢀ Fixed 1.8V or 1.5V Outputs (MAX1734)

ꢀ Adjustable Output Voltage (MAX1733)

Internal synchronous rectification greatly improves effi-

ciency and eliminates the external Schottky diode

required in conventional step-down converters. Both

devices also include internal digital soft-start to limit

input current upon startup and reduce input capacitor

requirements.

ꢀ

1.5% ꢀnitial Accuracy

ꢀ 2.7V to 5.5V ꢀnput Range

ꢀ Soft-Start Limits Startup Current

The MAX1733 provides an adjustable output voltage

(1.25V to 2.0V). The MAX1734 provides factory-preset

output voltages (see Selector Guide). Both are avail-

able in space-saving 5-pin SOT23 packages.

Ordering Information

PART

TEMP. RANGE

-40°C to +85°C

PꢀN-PACKAGE

5 SOT23-5

MAX1733EUK-T

MAX1734EUK_ _-T

5 SOT23-5

Note: The MAX1734 offers two output voltages. See the Selector

Guide, then insert the proper designator into the blanks above to

complete the part number.

Applications

Cellular, PCS, and Cordless Telephones

PDAs, Palmtops, and Handy-Terminals

Battery-Powered Equipment

Selector Guide

PART

(V)

TOP MARK

ADKY

OUT

MAX1733EUK

MAX1734EUK18

MAX1734EUK15

Adjustable

1.8

ADKW

1.5

ADKX

Typical Operating Circuit

Pin Configuration

TOP VIEW

INPUT

+2.7V TO +5.5V

OUT

250mA

10µH

2.2µF

22µF

MAX1734

MAX1733

MAX1734

GND

SHDN

OUT

SHDN

OUT (FB)

GND

SOT23-5

( ) ARE FOR MAX1733 ONLY.

________________________________________________________________ Maxim Integrated Products

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7 8

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与MAX1733相关器件

型号	品牌	获取价格	描述	数据表
MAX17330	ADI	获取价格	AccuCharge + ModelGauge 单电池充电器、电量计和保护器
MAX17332	ADI	获取价格	AccuCharge + ModelGauge m5 EZ 1-Cell Charger, Fuel Gauge, and Protector
MAX1733EUK	MAXIM	获取价格	Low-Voltage, Step-Down DC-DC Converters in SOT23
MAX1733EUK+	MAXIM	获取价格	Switching Regulator, Voltage-mode, 0.565A, 1200kHz Switching Freq-Max, BICMOS, PDSO5, LEAD
MAX1733EUK-T	MAXIM	获取价格	Low-Voltage, Step-Down DC-DC Converters in SOT23
MAX1733EUK-TG05	MAXIM	获取价格	Switching Regulator, 0.565A, 1200kHz Switching Freq-Max, BICMOS, PDSO5, SOT-23, 5 PIN
MAX1734	MAXIM	获取价格	Evaluation Kit for the MAX3510[MAX3510EVKIT ]
MAX1734	ADI	获取价格	低电压、降压型DC-DC转换器，SOT23封装
MAX1734EUK__-T	MAXIM	获取价格	Low-Voltage, Step-Down DC-DC Converters in SOT23
MAX1734EUK15	MAXIM	获取价格	Low-Voltage, Step-Down DC-DC Converters in SOT23

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