LM2731

更新时间： 2024-11-05 12:09:43

品牌	Logo	应用领域
德州仪器 - TI		转换器开关升压转换器
页数	文件大小	规格书
16页	667K
描述
LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

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LM2731 数据手册

TI Confidential - NDA Restrictions

LM2731

www.ti.com

SNVS217F –MAY 2004–REVISED NOVEMBER 2012

LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

Check for Samples: LM2731

FEATURES

DESCRIPTION

The LM2731 switching regulators are current-mode

boost converters operating at fixed frequencies of 1.6

MHz (“X” option) and 600 kHz (“Y” option).

•

22V DMOS FET Switch

•

1.6 MHz (“X”), 0.6 MHz (“Y”) Switching

Frequency

The use of SOT-23 package, made possible by the

minimal power loss of the internal 1.8A switch, and

use of small inductors and capacitors result in the

industry's highest power density. The 22V internal

switch makes these solutions perfect for boosting to

voltages up to 20V.

•

Low R_DS(ON) DMOS FET

Switch Current up to 1.8A

Wide Input Voltage Range (2.7V–14V)

Low Shutdown Current (<1 µA)

5-Lead SOT-23 Package

These parts have a logic-level shutdown pin that can

be used to reduce quiescent current and extend

battery life.

Uses Tiny Capacitors and Inductors

Cycle-by-Cycle Current Limiting

Internally Compensated

Protection is provided through cycle-by-cycle current

limiting and thermal shutdown. Internal compensation

simplifies design and reduces component count.

APPLICATIONS

•

White LED Current Source

PDA’s and Palm-Top Computers

Digital Cameras

Table 1. Switch Frequency

1.6 MHz

0.6 MHz

Portable Phones and Games

Local Boost Regulator

Typical Application Circuit

Efficiency vs Load Current

L1/10mH

100

MBR0520

5 V_IN

5 - 12V Boost

^ó_ ëꢀŒ•]}v

V_IN

12V

OUT

500mA

(TYP)

51K

R1/117K

LM2731 —X“

SHDN

GND

2.2mF

13.3K

220pF

GND

4.7mF

500

100 200 300 400

LOAD CURRENT (mA)

Efficiency vs Load Current

MBR0520

L1/6.8mH

100

3.3 V_IN

SHDN

3.3 -5V Boost

^ò_ ëꢀŒ•]}v

V_IN

OUT

51K

R1/40.5K

LM2731 —Y“

700mA

(TYP)

SHDN

GND

2.2mF

470pF

13.3K

22mF

GND

400 600

800

200

LOAD CURRENT (mA)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...16

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LM2731 替代型号

型号	品牌	替代类型	描述	数据表
LM2735-Q1	TI	功能相似	LM2735-xx 520-kHz and 1.6-MHz Space-Efficient Boost and SEPIC DC-DC Regulator
LM2733	TI	功能相似	40V DMOS FET Switch, 1.6 MHz (âXâ), 0.6 M
LM2735	TI	功能相似	LM2735/LM2735-Q1 520kHz/1.6MHz â Space-Effi

与LM2731相关器件

型号	品牌	获取价格	描述	数据表
LM2731_07	NSC	获取价格	0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
LM2731_14	TI	获取价格	0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
LM2731_15	TI	获取价格	0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23
LM27313	TI	获取价格	LM27313/LM27313-Q1
LM27313	NSC	获取价格	1.6 MHz Boost Converter With 30V Internal FET Switch in SOT-23
LM27313_07	NSC	获取价格	1.6 MHz Boost Converter With 30V Internal FET Switch in SOT-23
LM27313-Q1	TI	获取价格	具有 30V 内部 FET 开关并采用 SOT-23 封装的 1.6MHz 升压转换器，符
LM27313XMF	NSC	获取价格	1.6 MHz Boost Converter With 30V Internal FET Switch in SOT-23
LM27313XMF	TI	获取价格	LM27313/LM27313-Q1
LM27313XMF/NOPB	TI	获取价格	具有 30V 内部 FET 开关并采用 SOT-23 封装的 1.6MHz 升压转换器 \|

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