LM2662是TI公司的一款电荷泵（无感应器）产品，LM2662是开关电容器电压转换器，本页介绍了LM2662的产品说明、应用、特性等，并给出了与LM2662相关的TI元器件型号供参考。
LM2662 - 开关电容器电压转换器 - 电荷泵（无感应器） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
- 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
- Laptop Computers
- Cellular Phones
- Medical Instruments
- Operational Amplifier Power Supplies
- Interface Power Supplies
- Handheld Instruments
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.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM2662 | SOIC (8) | 4.90 mm x 3.91 mm |
| LM2663 |
