LM2623

更新时间： 2024-11-09 12:18:39

品牌	Logo	应用领域
德州仪器 - TI		振荡器转换器栅升压转换器
页数	文件大小	规格书
16页	936K
描述
LM2623 General Purpose, Gated Oscillator Based, DC/DC Boost Converter

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LM2623 数据手册

LM2623

www.ti.com

SNVS188G –MAY 2004–REVISED DECEMBER 2005

LM2623 General Purpose, Gated Oscillator Based, DC/DC Boost Converter

Check for Samples: LM2623

FEATURES

DESCRIPTION

The LM2623 is a high efficiency, general purpose,

step-up DC-DC switching regulator for battery-

powered and low input voltage systems. It accepts an

input voltage between .8 and 14 volts and converts it

into a regulated output voltage between 1.24 and 14

volts. Efficiencies up to 90% are achievable with the

LM2623.

•

Good Efficiency Over a Very Wide Load Range

Very Low Output Voltage Ripple

Small, VSSOP-8 Package (Half the Footprint of

Standard 8 pin SOIC Package)

•

1.09 mm Package Height

Up to 2 MHz Switching Frequency

.8V to 14V Operating Voltage

1.1V Start-up Voltage

In order to adapt to a number of applications, the

LM2623 allows the designer to vary the output

voltage, the operating frequency (300kHz to 2 MHz)

and duty cycle (17% to 90%) to optimize the part's

performance. The selected values can be fixed or can

vary with battery voltage or input to output voltage

1.24V - 14V Adjustable Output Voltage

Up to 2A Load Current at Low Output Voltages

0.17Ω Internal MOSFET

ratio. The LM2623 uses

a very simple, on/off

Up to 90% Regulator Efficiency

regulation mode to produce good efficiency and

stable operation over a wide operating range. It

normally regulates by skipping switching cycles when

it reaches the regulation limit (Pulse Frequency

Modulation).

80 µA Typical Operating Current (into V_DDPin

of Supply)

•

<2.5µA Specified Supply Current In Shutdown

4mm x 4mm Thermally Enhanced WSON

Package Option

Note: Please read the Non-Linear Effect and

Choosing The Correct C3 Capacitor sub-sections of

the Design Procedure section of this data sheet, so

that any challenges with designing with this part can

be taken into account before a board design/layout is

finalized.

APPLICATIONS

•

Cameras, Pagers and Cell Phones

PDAs, Palmtop Computers, GPS Devices

White LED Drive, TFT or Scanned LCDs

Flash Memory Programming

For Alternative Solutions, See Also: LM2700,

LM2622, LM2731, LM2733, and LM2621.

Hand-Held Instruments

1, 2, 3 or 4 Cell Alkaline Systems

1, 2 or 3 Cell Lithium-ion Systems

Typical Application Circuit

4.7mH

150k

2 Cells

4.7pF

22mF

BOOT

FREQ

LM2623

100mF

RF1

300k

tan

PGND

SGND

RF2

100k

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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LM2623 替代型号

型号	品牌	替代类型	描述	数据表
LM2698	TI	功能相似	SIMPLE SWITCHER® 1.35A 升压稳压器
LM3224	TI	功能相似	615kHz/1.25MHz 升压 PWM 直流/直流转换器
LM2731	TI	功能相似	LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

与LM2623相关器件

型号	品牌	获取价格	描述	数据表
LM2623_04	NSC	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623_05	NSC	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623_14	TI	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623_15	TI	获取价格	General-Purpose, Gated-Oscillator-Based DC/DC Boost Converter
LM2623ALD	NSC	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623ALD	TI	获取价格	LM2623 General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623ALD/NOPB	TI	获取价格	0.8V to 14V input voltage, 2A load current, step-up DC-DC 14-WSON -40 to 85
LM2623ALDX	NSC	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623AMM	NSC	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623AMM	TI	获取价格	LM2623 General Purpose, Gated Oscillator Based, DC/DC Boost Converter

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