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LM2611BMF
IC REG CUK ADJ 900MA SOT23-5
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- 製造商。 部分 #LM2611BMF
- 包 SOT-23-5
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規格
| Package | Tape & Reel (TR) |
| ProductStatus | Obsolete |
| Function | Step-Up/Step-Down |
| OutputConfiguration | Negative |
| Topology | Cuk |
| OutputType | Adjustable |
| NumberofOutputs | 1 |
| Voltage-Input(Min) | 2.7V |
| Voltage-Input(Max) | 14V |
| Voltage-Output(Min/Fixed) | -1.23V |
| Voltage-Output(Max) | -22V |
| Current-Output | 900mA |
| Frequency-Switching | 1.4MHz |
| SynchronousRectifier | No |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | SC-74A, SOT-753 |
概述
Description
The LM2611BMF is a high-efficiency, inverting switching regulator designed by Texas Instruments. It is primarily used to generate negative output voltages from a positive input supply, making it suitable for applications requiring a negative voltage supply, such as LCD biasing, sensor power supplies, and operational amplifier circuits. The device operates at a fixed frequency of 1.4 MHz, allowing the use of small inductors and capacitors, thereby minimizing the overall solution size.
The LM2611BMF features an integrated power MOSFET and a current-mode PWM control scheme, providing precise output regulation and efficient power conversion. It supports input voltage ranges from 2.7V to 14V and can deliver output currents up to 1A, depending on the configuration and thermal conditions. Additionally, the regulator includes protection features like current limiting, thermal shutdown, and soft-start to enhance reliability and performance.
Packaged in a small, 8-pin VSSOP, the LM2611BMF is ideal for space-constrained applications. Its flexibility, efficiency, and compact design make it a popular choice for engineers designing circuits that require negative voltage outputs.
The LM2611BMF features an integrated power MOSFET and a current-mode PWM control scheme, providing precise output regulation and efficient power conversion. It supports input voltage ranges from 2.7V to 14V and can deliver output currents up to 1A, depending on the configuration and thermal conditions. Additionally, the regulator includes protection features like current limiting, thermal shutdown, and soft-start to enhance reliability and performance.
Packaged in a small, 8-pin VSSOP, the LM2611BMF is ideal for space-constrained applications. Its flexibility, efficiency, and compact design make it a popular choice for engineers designing circuits that require negative voltage outputs.
Features
The LM2611BMF is a high-efficiency, low-noise, inverting switching regulator designed for applications requiring negative output voltages. Key features include:
1. Wide Input Voltage Range: It operates from a 1.4V to 14V input, making it versatile for various power supply sources.
2. Adjustable Output Voltage: The regulator allows for a negative output voltage, adjustable down to -12V, providing flexibility for different circuit requirements.
3. High Switching Frequency: With a switching frequency of up to 1.4 MHz, it supports small external components and high power density designs.
4. Efficient Operation: The device offers high efficiency, optimizing power consumption and heat dissipation, ideal for battery-powered applications.
5. Low Noise: It features low output voltage ripple and low electromagnetic interference (EMI), making it suitable for noise-sensitive applications.
6. Compact Package: Available in a small SOT-23 package, it is suitable for space-constrained applications.
7. Protection Features: Includes current limiting and thermal shutdown for enhanced reliability and protection of the circuit.
These features make the LM2611BMF suitable for portable electronics, communication devices, and other applications requiring efficient negative voltage regulation.
1. Wide Input Voltage Range: It operates from a 1.4V to 14V input, making it versatile for various power supply sources.
2. Adjustable Output Voltage: The regulator allows for a negative output voltage, adjustable down to -12V, providing flexibility for different circuit requirements.
3. High Switching Frequency: With a switching frequency of up to 1.4 MHz, it supports small external components and high power density designs.
4. Efficient Operation: The device offers high efficiency, optimizing power consumption and heat dissipation, ideal for battery-powered applications.
5. Low Noise: It features low output voltage ripple and low electromagnetic interference (EMI), making it suitable for noise-sensitive applications.
6. Compact Package: Available in a small SOT-23 package, it is suitable for space-constrained applications.
7. Protection Features: Includes current limiting and thermal shutdown for enhanced reliability and protection of the circuit.
These features make the LM2611BMF suitable for portable electronics, communication devices, and other applications requiring efficient negative voltage regulation.
Package
The LM2611BMF is a high-frequency, inverting DC-DC converter from Texas Instruments. It is typically available in the SOT-23 package type, which is a small outline transistor package designed for surface mounting on electronic circuit boards.
Pinout
The LM2611BMF is a current mode, PWM inverting switching regulator. It is typically used for generating negative output voltages. The device is packaged in a SOT-23-6 package, meaning it has 6 pins. The pin functions are as follows:
1. SW (Switch Output): This pin is connected to the inductor and is the switching node where the inductor current flows.
2. GND (Ground): Common ground reference for the device.
3. FB (Feedback): This pin is connected to the midpoint of a resistor divider to set the output voltage.
4. VIN (Input Voltage): The input supply voltage pin.
5. SHDN (Shutdown): A logic level control input to enable or disable the device.
6. COMP (Compensation): Used for compensating the control loop; it connects to a capacitor or RC network to ground.
These pins together allow the LM2611BMF to efficiently convert a positive input voltage to a negative output voltage with a high degree of control.
1. SW (Switch Output): This pin is connected to the inductor and is the switching node where the inductor current flows.
2. GND (Ground): Common ground reference for the device.
3. FB (Feedback): This pin is connected to the midpoint of a resistor divider to set the output voltage.
4. VIN (Input Voltage): The input supply voltage pin.
5. SHDN (Shutdown): A logic level control input to enable or disable the device.
6. COMP (Compensation): Used for compensating the control loop; it connects to a capacitor or RC network to ground.
These pins together allow the LM2611BMF to efficiently convert a positive input voltage to a negative output voltage with a high degree of control.
Manufacturer
The LM2611BMF is manufactured by Texas Instruments. Texas Instruments is an American technology company that designs and manufactures semiconductors and various integrated circuits. They are a leading manufacturer in the electronics industry, providing products for analog and embedded processing applications. Texas Instruments is known for its innovation in developing technology that is used in a wide range of electronic devices, from consumer gadgets to industrial systems.
Application
The LM2611BMF is a step-down DC-DC converter generally used in applications requiring efficient voltage regulation. Key application areas include portable electronic devices, battery-powered systems, and low-voltage distributed power systems. Its compact form and ability to deliver stable output make it ideal for powering microcontrollers, sensors, and communication modules in embedded systems.
Equivalent
The LM2611BMF is a negative output voltage regulator. Equivalent products could include other inverting switching regulators with similar specifications, such as the Texas Instruments LM2663, Analog Devices ADP5070, or Linear Technology LT3582. When choosing an alternative, ensure that the replacement matches the electrical characteristics, pin configuration, and package type of the LM2611BMF. Always verify with the manufacturer's datasheets to ensure compatibility.
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