LM2663

現行

具低電流關機模式的 200mA切換式電容器電壓轉換器

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 85 Type Charge pump Iout (max) (A) 0.2 Vin (min) (V) 1.5 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 27.5 Switching frequency (max) (kHz) 75 Features Enable, Unregulated Vout (min) (V) -5.5 Vout (max) (V) 11 Iq (typ) (µA) 1300
Rating Catalog Operating temperature range (°C) -40 to 85 Type Charge pump Iout (max) (A) 0.2 Vin (min) (V) 1.5 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 27.5 Switching frequency (max) (kHz) 75 Features Enable, Unregulated Vout (min) (V) -5.5 Vout (max) (V) 11 Iq (typ) (µA) 1300
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Inverts or Doubles Input Supply Voltage
  • 3.5-Ω Typical Output Resistance
  • 86% Typical Conversion Efficiency at 200 mA
  • (LM2662) Selectable Oscillator Frequency:
    20 kHz/150 kHz
  • (LM2663) Low Current Shutdown Mode
  • Inverts or Doubles Input Supply Voltage
  • 3.5-Ω Typical Output Resistance
  • 86% Typical Conversion Efficiency at 200 mA
  • (LM2662) Selectable Oscillator Frequency:
    20 kHz/150 kHz
  • (LM2663) Low Current Shutdown Mode

The LM2662/LM2663 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5 V to 5.5 V to the corresponding negative voltage. The LM2662/LM2663 uses two low cost capacitors to provide 200 mA of output current without the cost, size, and EMI related to inductor based converters. With an operating current of only 300 µA and operating efficiency greater than 90% at most loads, the LM2662/LM2663 provides ideal performance for battery powered systems. The LM2662/LM2663 may also be used as a positive voltage doubler.

The oscillator frequency can be lowered by adding an external capacitor to the OSC pin. Also, the OSC pin may be used to drive the LM2662/LM2663 with an external clock. For LM2662, a frequency control (FC) pin selects the oscillator frequency of 20 kHz or 150 kHz. For LM2663, an external shutdown (SD) pin replaces the FC pin. The SD pin can be used to disable the device and reduce the quiescent current to 10 µA. The oscillator frequency for LM2663 is 150 kHz.

The LM2662/LM2663 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5 V to 5.5 V to the corresponding negative voltage. The LM2662/LM2663 uses two low cost capacitors to provide 200 mA of output current without the cost, size, and EMI related to inductor based converters. With an operating current of only 300 µA and operating efficiency greater than 90% at most loads, the LM2662/LM2663 provides ideal performance for battery powered systems. The LM2662/LM2663 may also be used as a positive voltage doubler.

The oscillator frequency can be lowered by adding an external capacitor to the OSC pin. Also, the OSC pin may be used to drive the LM2662/LM2663 with an external clock. For LM2662, a frequency control (FC) pin selects the oscillator frequency of 20 kHz or 150 kHz. For LM2663, an external shutdown (SD) pin replaces the FC pin. The SD pin can be used to disable the device and reduce the quiescent current to 10 µA. The oscillator frequency for LM2663 is 150 kHz.

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類型 標題 日期
* Data sheet LM266x Switched Capacitor Voltage Converter datasheet (Rev. E) PDF | HTML 2014年 10月 31日
White paper The Forgotten Converter 2015年 6月 15日
EVM User's guide AN-1142 LM2661/3/4 Evaluation Board (Rev. C) 2013年 4月 30日

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開發板

LM2661-3-4EVAL — 開關電容器電壓轉換器

LM2661、LM2663 和 LM2664 是屬於 CMOS 電荷泵電壓轉換器系列的一部分 (表2)。每個都使用兩個小電容器來實現電壓反轉或使電壓倍增,而沒有以電感器為主的轉換器成本、尺寸和 EMI。每部裝置都具備關機功能,而 LM2661 和 LM2663 也提供從外部來源執行時脈振盪器的能力。您也可以在 LM2661 和 LM2663 上使用外部電容器來減緩時脈速度。這些電路的小尺寸和小體積使其對行動電話、筆記型電腦、運算放大器電源、介面電源供應、醫療儀器、PDA 和手持儀器都具有吸引力。

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