Overview
The LM2664M6 from Texas Instruments is a CMOS charge-pump voltage converter designed to invert a positive input voltage in the range of 1.8 V to 5.5 V to the corresponding negative voltage of −1.8 V to −5.5 V. This device is particularly suited for battery-powered systems due to its low operating current and high efficiency. The LM2664M6 operates at a 160-kHz oscillator frequency, which helps in reducing output resistance and voltage ripple. It uses two external low-cost capacitors to provide up to 40 mA of output current, making it an efficient solution for various electronic applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 1.8 | - | 5.5 | V |
| Output Current | - | - | 40 mA | A |
| Output Voltage Range | -5.8 | - | -1.8 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Switching Frequency | - | - | 160 kHz | Hz |
| Output Impedance | - | 12 Ω | - | Ω |
| Conversion Efficiency | - | 91% | - | % |
| Operating Current | - | 220 μA | - | A |
| Shutdown Current | - | 1 μA | - | A |
| Package Type | - | - | SOT-23 (6-pin) | - |
Key Features
- Inverts input supply voltage in the range of 1.8 V to 5.5 V to the corresponding negative voltage of −1.8 V to −5.5 V.
- 6-pin SOT-23 package.
- Typical output impedance of 12 Ω.
- Typical conversion efficiency of 91% at 40 mA output current.
- Low operating current of 220 μA and typical shutdown current of 1 μA.
- Operates at a 160-kHz oscillator frequency to reduce output resistance and voltage ripple.
- Uses two external low-cost capacitors for energy transfer and storage.
Applications
- Cellular phones.
- Pagers.
- PDAs (Personal Digital Assistants).
- Operational amplifier power suppliers.
- Interface power suppliers.
- Handheld instruments.
Q & A
- What is the input voltage range of the LM2664M6? The input voltage range is 1.8 V to 5.5 V.
- What is the output voltage range of the LM2664M6? The output voltage range is −1.8 V to −5.5 V.
- What is the maximum output current of the LM2664M6? The maximum output current is 40 mA.
- What is the typical conversion efficiency of the LM2664M6 at 40 mA output current? The typical conversion efficiency is 91%.
- What is the operating current of the LM2664M6? The operating current is 220 μA.
- What is the typical shutdown current of the LM2664M6? The typical shutdown current is 1 μA.
- What is the switching frequency of the LM2664M6? The switching frequency is 160 kHz.
- What type of package does the LM2664M6 use? The LM2664M6 uses a 6-pin SOT-23 package.
- What are some common applications of the LM2664M6? Common applications include cellular phones, pagers, PDAs, operational amplifier power suppliers, interface power suppliers, and handheld instruments.
- How does the LM2664M6 reduce output resistance and voltage ripple? The LM2664M6 operates at a 160-kHz oscillator frequency to reduce output resistance and voltage ripple.
