Overview
The LM2664M6/NOPB is a CMOS charge-pump voltage converter produced by Texas Instruments. This device is designed to invert a positive 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. It uses two low-cost external capacitors to achieve this conversion, providing up to 40 mA of output current. The LM2664 operates at a 160-kHz oscillator frequency, which helps reduce output resistance and voltage ripple. With an operating current of only 220 µA and a typical shutdown current of 1 µA, it is ideal for battery-powered systems.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (V+ to GND) | 1.8 | - | 5.5 | V |
| Output Current | - | - | 50 | mA |
| Output Voltage Range | -5.5 | - | -1.8 | V |
| Oscillator Frequency | - | 160 kHz | - | kHz |
| Operating Current | - | 220 µA | - | µA |
| Shutdown Current | - | 1 µA | - | µA |
| Conversion Efficiency | - | 91% (at 40 mA) | - | % |
| Output Impedance | - | 12 Ω | - | Ω |
| Package Type | - | SOT-23 (6 pins) | - | - |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Inverts a positive 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.
- Uses two low-cost external capacitors to provide up to 40 mA of output current.
- Operates at a 160-kHz oscillator frequency to reduce output resistance and voltage ripple.
- Typical conversion efficiency greater than 91% with most loads.
- Low operating current of 220 µA and typical shutdown current of 1 µA, making it suitable for battery-powered systems.
- Available in a 6-pin SOT-23 package).
- Supports paralleling and cascading devices to reduce output resistance and increase output voltage).
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/NOPB? The input voltage range is from 1.8 V to 5.5 V).
- What is the output voltage range of the LM2664M6/NOPB? The output voltage range is from −1.8 V to −5.5 V).
- What is the maximum output current of the LM2664M6/NOPB? The maximum output current is 40 mA).
- At what frequency does the LM2664M6/NOPB operate? It operates at a 160-kHz oscillator frequency).
- What is the typical operating current of the LM2664M6/NOPB? The typical operating current is 220 µA).
- What is the typical shutdown current of the LM2664M6/NOPB? The typical shutdown current is 1 µA).
- What is the conversion efficiency of the LM2664M6/NOPB at 40 mA output current? The conversion efficiency is greater than 91% at 40 mA).
- Can multiple LM2664M6/NOPB devices be paralleled or cascaded? Yes, devices can be paralleled to reduce output resistance and cascaded to increase the output voltage).
- What package type is the LM2664M6/NOPB available in? It is available in a 6-pin SOT-23 package).
- What is the operating temperature range of the LM2664M6/NOPB? The operating temperature range is from −40°C to 85°C).
