Overview
The LM2665M6X/NOPB, produced by Texas Instruments, is a CMOS charge-pump voltage converter designed to operate as a voltage doubler or voltage divider. This device is particularly useful in battery-powered systems due to its high efficiency and low power consumption. It can double input voltages in the range of 2.5 V to 5.5 V or split voltages in the range of 1.8 V to 11 V in half. The LM2665 features a compact SOT-23-6 package, making it ideal for space-constrained applications such as cellular phones, pagers, PDAs, and handheld instruments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range (Voltage Doubler) | 2.5 to 5.5 | V |
| Input Voltage Range (Voltage Split) | 1.8 to 11 | V |
| Output Current | Up to 40 | mA |
| Oscillator Frequency | 160 | kHz |
| Typical Output Impedance | 12 Ω | Ω |
| Typical Conversion Efficiency | 90% | % |
| Typical Shutdown Current | 1 μA | μA |
| Package Type | SOT-23-6 | |
| Operating Current | 650 μA | μA |
Key Features
- Operates as a voltage doubler or voltage divider.
- High efficiency with up to 90% conversion efficiency at 40 mA.
- Low shutdown current of 1 μA.
- Compact SOT-23-6 package.
- Low-cost implementation using external capacitors and a diode.
- Ability to parallel devices to reduce output resistance.
- Cascading capability to achieve higher output voltages.
Applications
- Cellular phones and pagers.
- PDAs and handheld instruments.
- Operational amplifier power suppliers and interface power suppliers.
- Fire detection and notification systems.
- Industrial handheld radios and blood pressure monitors.
Q & A
- What is the input voltage range for the LM2665 when used as a voltage doubler?
The input voltage range for the LM2665 when used as a voltage doubler is 2.5 V to 5.5 V.
- What is the maximum output current of the LM2665?
The maximum output current of the LM2665 is up to 40 mA.
- What is the typical conversion efficiency of the LM2665 at 40 mA load?
The typical conversion efficiency of the LM2665 at 40 mA load is 90%.
- How can the output resistance of the LM2665 be reduced?
The output resistance of the LM2665 can be reduced by paralleling multiple devices.
- What is the typical shutdown current of the LM2665?
The typical shutdown current of the LM2665 is 1 μA.
- What package type is the LM2665 available in?
The LM2665 is available in a SOT-23-6 package.
- Can the LM2665 be used to split voltages?
- What is the oscillator frequency of the LM2665?
The oscillator frequency of the LM2665 is 160 kHz.
- How does the LM2665 achieve voltage doubling?
The LM2665 achieves voltage doubling through a sequence of CMOS switches and external capacitors.
- What are some typical applications of the LM2665?
Typical applications include cellular phones, pagers, PDAs, and handheld instruments.
