LM2663MX集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

LM2663MX属于集成电路（IC）的稳压器-DC-DC开关稳压器。由德州仪器制造生产的LM2663MX稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

1 Features

1• 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

2 Applications

• Laptop Computers

• Cellular Phones

• Medical Instruments

• Operational Amplifier Power Supplies

• Interface Power Supplies

• Handheld Instruments

3 Description

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.