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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM2662

現行

200mA 切換式電容器電壓轉換器

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產品規格表

LM2662

現行
產品規格表 立即訂購

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 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 Unregulated Vout (min) (V) -5.5 Vout (max) (V) 11 Iq (typ) (µA) 1300
  • 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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* Data sheet LM266x Switched Capacitor Voltage Converter datasheet (Rev. E) PDF | HTML 2014年 10月 31日

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