Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Function | Ratiometric |
| Output Configuration | Negative |
| Topology | Charge Pump |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | -Vin |
| Current - Output | 200mA |
| Frequency - Switching | 2MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
Tổng quan
Description
The LM2776DBVR is a charge pump voltage inverter manufactured by Texas Instruments. It is designed to generate a negative output voltage from a positive input voltage, effectively doubling the voltage range available for analog circuits. The device operates with a low input voltage ranging from 2.7V to 5.5V and delivers a regulated negative output voltage, making it suitable for battery-powered applications.
The LM2776DBVR features a high-efficiency charge pump design that minimizes power loss and heat generation, with a typical output current capability of up to 200 mA. It operates at a fixed frequency of approximately 2 MHz, reducing the size of external components and enabling compact designs. The device also includes various protection features, such as thermal shutdown and short-circuit protection, ensuring reliable operation.
Its compact SOT-23-6 package and minimal external component requirements make it ideal for space-constrained applications. Typical uses include powering op-amps, LCD biasing, and other low-power analog circuits where a negative voltage rail is necessary.
The LM2776DBVR features a high-efficiency charge pump design that minimizes power loss and heat generation, with a typical output current capability of up to 200 mA. It operates at a fixed frequency of approximately 2 MHz, reducing the size of external components and enabling compact designs. The device also includes various protection features, such as thermal shutdown and short-circuit protection, ensuring reliable operation.
Its compact SOT-23-6 package and minimal external component requirements make it ideal for space-constrained applications. Typical uses include powering op-amps, LCD biasing, and other low-power analog circuits where a negative voltage rail is necessary.
Equivalent
The LM2776DBVR is a switched capacitor voltage inverter from Texas Instruments. Equivalent products include:
1. MAX660 from Maxim Integrated (now Analog Devices)
2. LTC660 from Linear Technology (also Analog Devices)
3. ICL7660 from Intersil (now Renesas Electronics)
4. TC7660 from Microchip Technology
These alternatives offer similar functionality as negative voltage converters or charge-pump inverters, but be sure to check the specific electrical characteristics and pin compatibility before substituting.
1. MAX660 from Maxim Integrated (now Analog Devices)
2. LTC660 from Linear Technology (also Analog Devices)
3. ICL7660 from Intersil (now Renesas Electronics)
4. TC7660 from Microchip Technology
These alternatives offer similar functionality as negative voltage converters or charge-pump inverters, but be sure to check the specific electrical characteristics and pin compatibility before substituting.
Features
The LM2776DBVR is a switched capacitor voltage inverter designed to efficiently produce a negative output voltage from a positive input voltage. Key features include:
1. Input Voltage Range: Operates from 2.7V to 5.5V, making it compatible with a wide range of applications.
2. Output Voltage: Inverts the input voltage, providing an output voltage of -Vin.
3. Output Current: Supports a maximum output current of up to 200mA.
4. Efficiency: High efficiency due to its switched capacitor architecture, minimizing power loss.
5. Low Noise: Incorporates a regulated -5V output with low output ripple.
6. Shutdown Function: Includes an active-low shutdown pin to reduce power consumption when the device is not in use.
7. Thermal Protection: Built-in thermal shutdown feature to protect the device from overheating.
8. Compact Package: Available in a small SOT-23-6 package, suitable for space-constrained applications.
These features make the LM2776DBVR a versatile choice for portable electronics, battery-powered devices, and applications requiring a negative voltage supply.
1. Input Voltage Range: Operates from 2.7V to 5.5V, making it compatible with a wide range of applications.
2. Output Voltage: Inverts the input voltage, providing an output voltage of -Vin.
3. Output Current: Supports a maximum output current of up to 200mA.
4. Efficiency: High efficiency due to its switched capacitor architecture, minimizing power loss.
5. Low Noise: Incorporates a regulated -5V output with low output ripple.
6. Shutdown Function: Includes an active-low shutdown pin to reduce power consumption when the device is not in use.
7. Thermal Protection: Built-in thermal shutdown feature to protect the device from overheating.
8. Compact Package: Available in a small SOT-23-6 package, suitable for space-constrained applications.
These features make the LM2776DBVR a versatile choice for portable electronics, battery-powered devices, and applications requiring a negative voltage supply.
Pinout
The LM2776DBVR is a switched capacitor voltage inverter IC from Texas Instruments. It has a 6-pin configuration. Here are its pin functions:
1. VIN: Input Voltage - Connects to the input supply voltage.
2. GND: Ground - Ground reference for the IC.
3. C1+: Positive Terminal for the Flying Capacitor - Connects to the positive terminal of the external flying capacitor.
4. C1-: Negative Terminal for the Flying Capacitor - Connects to the negative terminal of the external flying capacitor.
5. VOUT: Output Voltage - Provides the inverted voltage output.
6. EN: Enable - Enables or disables the device. When high, the device is enabled.
The LM2776 is primarily used to invert the input voltage to produce a negative output voltage with respect to ground. It is suitable for applications requiring a low-noise output and is often utilized in portable devices for generating a negative rail from a single positive supply.
1. VIN: Input Voltage - Connects to the input supply voltage.
2. GND: Ground - Ground reference for the IC.
3. C1+: Positive Terminal for the Flying Capacitor - Connects to the positive terminal of the external flying capacitor.
4. C1-: Negative Terminal for the Flying Capacitor - Connects to the negative terminal of the external flying capacitor.
5. VOUT: Output Voltage - Provides the inverted voltage output.
6. EN: Enable - Enables or disables the device. When high, the device is enabled.
The LM2776 is primarily used to invert the input voltage to produce a negative output voltage with respect to ground. It is suitable for applications requiring a low-noise output and is often utilized in portable devices for generating a negative rail from a single positive supply.
Manufacturer
The LM2776DBVR is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and produces a wide variety of electronic components, including integrated circuits and embedded processors. TI serves various industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is known for its innovation in analog and digital signal processing, power management, and other semiconductor technologies.
Application
The LM2776DBVR is a switched capacitor voltage inverter commonly used in applications requiring negative voltage generation from a positive source. It is ideal for powering analog circuits, sensors, and operational amplifiers, particularly in battery-powered devices where compact size and efficiency are critical. Its compact form factor and low power consumption make it suitable for portable electronics, smartphones, and handheld devices. Additionally, the LM2776DBVR can be used in medical instruments, communication devices, and industrial applications where a stable negative voltage supply is necessary.
Package
The LM2776DBVR is a voltage inverter IC from Texas Instruments, housed in a SOT-23-6 package. This package type is a small outline transistor with 6 leads, designed for surface mounting on a printed circuit board (PCB), offering space-saving benefits for compact electronic designs.
