LM2623 - 通用，基于闸控的振荡器，DC/DC 升压转换器

LM2623是TI德州仪器公司的一款转换器（集成开关）产品，LM2623是通用，基于闸控的振荡器，DC/DC 升压转换器，本站介绍了LM2623的封装应用图解、特点和优点、功能等，并给出了与LM2623相关的TI元器件型号供参考。

LM2623 - 通用，基于闸控的振荡器，DC/DC 升压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

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
Up to 90% Regulator Efficiency
80-µA Typical Operating Current (Into VDD Pin of Supply)
< 2.5-µA Ensured Supply Current In Shutdown
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

产品应用

Cameras, Pagers and Cell Phones
PDAs, Palmtop Computers, GPS devices
White LED Drive, TFT, or Scanned LCDs
Flash Memory Programming
Hand-Held Instruments
1, 2, 3, or 4 Cell Alkaline Systems
1, 2, or 3 Cell Lithium-ion Systems

产品说明

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.

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 ratio. The LM2623 uses a very simple, on/off 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).

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.

For alternative solutions, See Also: LM2700, LM2622, LM2731, LM2733, and LM2621.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM2623	WSON (14)	4.00 mm x 4.00 mm
LM2623	VSSOP (8)	3.00 mm x 3.00 mm

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