LM2623是TI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,本页介绍了LM2623的产品说明、应用、特性等,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 - TI公司(Texas Instruments,德州仪器)
- 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
- 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
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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LM2623 | WSON (14) | 4.00 mm x 4.00 mm |
VSSOP (8) | 3.00 mm x 3.00 mm |