Datasheet > LM2623_15

LM2623_15

更新时间： 2024-11-27 01:09:43

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德州仪器 - TI		栅
页数	文件大小	规格书
22页	1324K
描述
General-Purpose, Gated-Oscillator-Based DC/DC Boost Converter

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LM2623

SNVS188H –MAY 2004–REVISED NOVEMBER 2014

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

1 Features

3 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 0.8 V and 14 V and converts it

into a regulated output voltage between 1.24 V and

14 V. Efficiencies up to 90% are achievable with the

LM2623.

•

Good Efficiency Over a Very Wide Load Range

Very Low Output Voltage Ripple

Up to 2-MHz Switching Frequency

0.8-V to 14-V Operating Voltage

1.1-V Start-up Voltage

•

1.24-V to 14-V Adjustable Output Voltage

Up to 2-A Load Current at Low Output Voltages

0.17-Ω Internal MOSFET

In order to adapt to a number of applications, the

LM2623 allows the designer to vary the output

voltage, the operating frequency (300 kHz 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

Up to 90% Regulator Efficiency

80-µA Typical Operating Current (Into V_DDPin of

Supply)

ratio. The LM2623 uses

a very simple, on/off

•

< 2.5-µA Ensured Supply Current In Shutdown

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).

Small 8-Pin VSSOP Package (Half the Footprint

of Standard 8-Pin SOIC Package); 1.09-mm

Package Height

•

4-mm x 4-mm Thermally Enhanced WSON

Package Option

Note: Please read the Non-Linear Effect and

Choosing the Correct C3 Capacitor sections so that

any challenges with designing with this part can be

taken into account before a board design/layout is

finalized.

2 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.

Device Information⁽¹⁾

Hand-Held Instruments

PART NUMBER

LM2623

PACKAGE

WSON (14)

VSSOP (8)

BODY SIZE (NOM)

4.00 mm x 4.00 mm

3.00 mm x 3.00 mm

1, 2, 3, or 4 Cell Alkaline Systems

1, 2, or 3 Cell Lithium-ion Systems

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Typical Application Circuit

4.7PH

150k

2 Cells

4.7pF

22PF

BOOT

FREQ

LM2623

100PF

tant

RF1

300k

PGND

SGND

RF2

100k

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...22

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与LM2623_15相关器件

型号	品牌	获取价格	描述	数据表
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
LM2623AMM/NOPB	ROCHESTER	获取价格	2.2A SWITCHING REGULATOR, 2000kHz SWITCHING FREQ-MAX, PDSO8, MINI, SO-8
LM2623AMM/NOPB	TI	获取价格	General-Purpose, Gated-Oscillator-Based DC/DC Boost Converter
LM2623AMMX	TI	获取价格	LM2623 General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623AMMX	NSC	获取价格	General Purpose, Gated Oscillator Based, DC/DC Boost Converter

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