Overview
The LM2766M6/NOPB, manufactured by Texas Instruments, is a CMOS charge-pump voltage converter designed to operate as a voltage doubler. This device is ideal for battery-powered systems due to its high efficiency and low power consumption. It can double the input supply voltage in the range of 1.8 V to 5.5 V, using two low-cost capacitors and a diode. The LM2766 operates at a 200-kHz switching frequency, which helps reduce output resistance and voltage ripple. With an operating current of only 350 µA and a typical shutdown current of 0.1 µA, it offers excellent performance for power-sensitive applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (V+ to GND) | 1.8 | - | 5.5 | V |
| Supply Current (No Load) | - | 350 | 950 | µA |
| Shutdown Supply Current | - | 0.1 | 0.6 | µA |
| Output Current | - | - | 20 | mA |
| Output Resistance | - | 20 | 55 | Ω |
| Oscillator Frequency | 220 | - | 700 | kHz |
| Switching Frequency | 110 | 200 | 350 | kHz |
| Power Efficiency | - | 94% | - | % |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Doubles Input Supply Voltage: The LM2766 can double the input voltage in the range of 1.8 V to 5.5 V.
- SOT-23 6-Pin Package: Compact package suitable for space-constrained designs.
- 20-Ω Typical Output Impedance: Low output impedance for stable output voltage.
- 90% Typical Conversion Efficiency at 20 mA: High efficiency for minimizing power loss.
- 0.1-µA Typical Shutdown Current: Extremely low current in shutdown mode, ideal for battery-powered devices.
- 200-kHz Switching Frequency: Reduces output resistance and voltage ripple.
Applications
- Cellular Phones: Ideal for voltage doubling in mobile phone designs.
- Pagers: Suitable for pager applications requiring efficient voltage conversion.
- PDAs: Used in personal digital assistants for power management.
- Operational Amplifier Power Supplies: Can be used to power operational amplifiers efficiently.
- Interface Power Supplies: Suitable for powering interface circuits.
- Handheld Instruments: Ideal for various handheld devices requiring compact and efficient power solutions.
Q & A
- What is the input voltage range of the LM2766? The input voltage range is from 1.8 V to 5.5 V.
- What is the typical output current of the LM2766? The typical output current is up to 20 mA.
- What is the typical shutdown current of the LM2766? The typical shutdown current is 0.1 µA.
- What is the switching frequency of the LM2766? The switching frequency is around 200 kHz.
- What is the typical conversion efficiency of the LM2766 at 20 mA? The typical conversion efficiency is 90%.
- What package type is the LM2766 available in? The LM2766 is available in a SOT-23 6-pin package.
- How can the output resistance of the LM2766 be reduced? The output resistance can be reduced by paralleling multiple LM2766 devices.
- Can the LM2766 be cascaded to produce higher output voltages? Yes, the LM2766 can be cascaded to produce higher output voltages.
- What are some common applications of the LM2766? Common applications include cellular phones, pagers, PDAs, operational amplifier power supplies, interface power supplies, and handheld instruments.
- How does the LM2766 reduce power consumption in battery-powered systems? The LM2766 reduces power consumption through its high conversion efficiency and extremely low shutdown current.
