Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Function | Step-Up/Step-Down |
| Output Configuration | Negative |
| Topology | Charge Pump |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.7V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | -1.5V |
| Voltage - Output (Max) | -5V |
| Current - Output | 250mA |
| Frequency - Switching | 2MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
Tổng quan
Description
The LM27761DSGT is a low-noise, negative output charge pump voltage inverter integrated circuit from Texas Instruments. Designed primarily for battery-powered applications, it converts a positive input voltage (ranging from 2.7V to 5.5V) into a stable negative output voltage without the need for an inductor. The device features a regulated output, typically set at -1.5V to -5.5V, depending on the application requirements.
Key specifications include a maximum output current of 250 mA, high efficiency due to low quiescent current, and a shutdown mode to minimize power consumption when not in use. The LM27761DSGT is appreciated for its low output voltage ripple and reduced electromagnetic interference (EMI), making it suitable for sensitive analog and RF applications.
Additional features include built-in thermal shutdown and current limiting, which enhance reliability and protect against overload conditions. The device is housed in a compact 8-pin WSON or VSSOP package, facilitating easy integration into space-constrained designs. Its simplicity, efficiency, and performance make it an ideal choice for portable electronic devices and other low-power applications.
Key specifications include a maximum output current of 250 mA, high efficiency due to low quiescent current, and a shutdown mode to minimize power consumption when not in use. The LM27761DSGT is appreciated for its low output voltage ripple and reduced electromagnetic interference (EMI), making it suitable for sensitive analog and RF applications.
Additional features include built-in thermal shutdown and current limiting, which enhance reliability and protect against overload conditions. The device is housed in a compact 8-pin WSON or VSSOP package, facilitating easy integration into space-constrained designs. Its simplicity, efficiency, and performance make it an ideal choice for portable electronic devices and other low-power applications.
Equivalent
The LM27761DSGT is a switched-capacitor voltage inverter with a low dropout (LDO) regulator. Equivalent products include:
1. Texas Instruments TPS60400 series (e.g., TPS60403)
2. Maxim Integrated MAX828 series
3. Intersil ISL97543 series
4. Analog Devices ADM8828 series
These alternatives offer similar voltage inverting capabilities and may vary slightly in specifications such as output current, voltage range, and efficiency. Always verify the specific requirements and compatibility for your application before selecting a replacement.
1. Texas Instruments TPS60400 series (e.g., TPS60403)
2. Maxim Integrated MAX828 series
3. Intersil ISL97543 series
4. Analog Devices ADM8828 series
These alternatives offer similar voltage inverting capabilities and may vary slightly in specifications such as output current, voltage range, and efficiency. Always verify the specific requirements and compatibility for your application before selecting a replacement.
Features
The LM27761DSGT is a switched-capacitor voltage inverter with several key features. It efficiently generates a negative output voltage from a positive input voltage and is designed for low-noise and low-power applications. The device operates with an input voltage range of 2.7V to 5.5V, providing an adjustable negative output voltage down to -5.5V. It offers a high switching frequency of 2MHz, which allows for the use of smaller capacitors, reducing overall solution size.
The LM27761DSGT has a low quiescent current, making it ideal for battery-powered applications. It includes a shutdown mode, reducing the current draw to a few microamperes when not in use. The device also features short-circuit protection and thermal shutdown to enhance reliability and protect against fault conditions. It is packaged in a small, thermally-enhanced, 8-pin WSON package, making it suitable for compact designs. These features make the LM27761DSGT well-suited for applications such as smartphones, portable media players, and other portable electronic devices.
The LM27761DSGT has a low quiescent current, making it ideal for battery-powered applications. It includes a shutdown mode, reducing the current draw to a few microamperes when not in use. The device also features short-circuit protection and thermal shutdown to enhance reliability and protect against fault conditions. It is packaged in a small, thermally-enhanced, 8-pin WSON package, making it suitable for compact designs. These features make the LM27761DSGT well-suited for applications such as smartphones, portable media players, and other portable electronic devices.
Pinout
The LM27761DSGT is a switched-capacitor voltage inverter and low-dropout regulator manufactured by Texas Instruments. It is designed to provide a regulated negative output voltage from a positive input voltage. The device is typically used in applications where a negative voltage rail is required, such as in powering operational amplifiers or other analog circuits.
The LM27761DSGT comes in a WSON (DSG) package with a pin count of 10. Key functions of the pins include:
1. VIN: Input voltage supply.
2. VOUT: Output voltage.
3. C1+ / C1-: Connection points for the flying capacitor used in the charge pump circuit.
4. C2+ / C2-: Additional connections for flying capacitors.
5. FB: Feedback pin for setting the output voltage.
6. EN: Enable pin to turn the device on or off.
7. GND: Ground connection.
8. NC: No Connection (not internally connected).
This configuration allows the LM27761DSGT to efficiently invert and regulate the input voltage to a stable negative output.
The LM27761DSGT comes in a WSON (DSG) package with a pin count of 10. Key functions of the pins include:
1. VIN: Input voltage supply.
2. VOUT: Output voltage.
3. C1+ / C1-: Connection points for the flying capacitor used in the charge pump circuit.
4. C2+ / C2-: Additional connections for flying capacitors.
5. FB: Feedback pin for setting the output voltage.
6. EN: Enable pin to turn the device on or off.
7. GND: Ground connection.
8. NC: No Connection (not internally connected).
This configuration allows the LM27761DSGT to efficiently invert and regulate the input voltage to a stable negative output.
Manufacturer
The LM27761DSGT is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of analog and embedded processing chips. TI is known for its innovation in the electronics industry, providing solutions for various applications, including industrial, automotive, personal electronics, and communications equipment. The company focuses on developing technologies that help in energy efficiency, performance, and integration, catering to both consumer and industrial markets.
Application
The LM27761DSGT is a charge pump voltage inverter commonly used in applications requiring a negative voltage supply. It is suitable for powering analog circuits, operational amplifiers, DACs, and ADCs in compact, battery-powered devices due to its efficient voltage conversion and low noise output. Additionally, it finds application in mobile devices, portable medical equipment, and other consumer electronics where space is limited and a compact negative voltage solution is necessary. Its low quiescent current also makes it ideal for low-power applications.
Package
The LM27761DSGT is a low noise regulated switched capacitor voltage inverter IC by Texas Instruments. It comes in an 8-pin WSON (DSG) package, which is compact and suitable for applications requiring space-efficient designs.
