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LT1931ES5
+Lista de MateriaisSwitching Voltage Regulators LT1931 - 1.2MHz/2.2MHz Inverting DC/DC Converters in ThinSOT
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FabricanteDispositivos analógicos
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Peça do Fabricante #LT1931ES5
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Ficha Técnica LT1931ES5 DataSheet
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Description
The LT1931ES5 is a part of Linear Technology's lineup of DC-DC converter integrated circuits. It is a negative step-up (also known as an inverting) switching regulator that efficiently converts a positive input voltage to a negative output voltage. The device is housed in a compact SOT-23 package, making it suitable for space-constrained applications.
Key features of the LT1931ES5 include a wide input voltage range, high efficiency, and a low quiescent current, which is beneficial for battery-powered devices. It operates at a high switching frequency, typically around 1.2 MHz, allowing for the use of small surface-mount inductors and capacitors. It also features an internal switch capable of delivering up to 1.2A of current, enabling it to handle various power demands.
The LT1931ES5 is commonly used in applications such as LCD bias supplies, sensor power supplies, and other systems requiring a negative voltage rail. Its ease of use, efficiency, and compact size make it an attractive choice for designers looking to implement a negative voltage supply in their circuits.
Key features of the LT1931ES5 include a wide input voltage range, high efficiency, and a low quiescent current, which is beneficial for battery-powered devices. It operates at a high switching frequency, typically around 1.2 MHz, allowing for the use of small surface-mount inductors and capacitors. It also features an internal switch capable of delivering up to 1.2A of current, enabling it to handle various power demands.
The LT1931ES5 is commonly used in applications such as LCD bias supplies, sensor power supplies, and other systems requiring a negative voltage rail. Its ease of use, efficiency, and compact size make it an attractive choice for designers looking to implement a negative voltage supply in their circuits.
Equivalent
The LT1931ES5 is a step-up DC-DC converter. Equivalent products to consider include the LM2731 from Texas Instruments, the MIC2288 from Microchip Technology, and the MC34063 from ON Semiconductor. These components serve similar functions, providing step-up conversion capabilities for various applications. Always check the specific electrical characteristics and pin configurations to ensure compatibility with your design.
Features
The LT1931ES5 is a micropower DC/DC converter designed for use in a variety of electronic devices. Key features include:
1. Voltage Range: Operates from a wide input voltage range, typically from 1.2V to 15V, making it versatile for different applications.
2. Switching Frequency: It features a fixed 1.2MHz switching frequency, allowing the use of tiny inductors and capacitors.
3. Efficiency: High-efficiency operation is achieved with up to 88% efficiency possible, which helps in extending battery life for portable devices.
4. Output Voltage: Capable of generating a wide range of output voltages, including the ability to generate negative voltages.
5. Package: Available in a small 5-lead SOT-23 package, which is ideal for space-constrained designs.
6. Shutdown Mode: Includes a shutdown mode that reduces the supply current to less than 1µA.
7. Minimum External Components: The design requires few external components, simplifying the overall circuit design and reducing space and cost.
These features make the LT1931ES5 suitable for applications such as OLED displays, biasing for photodiodes, and powering small sensors.
1. Voltage Range: Operates from a wide input voltage range, typically from 1.2V to 15V, making it versatile for different applications.
2. Switching Frequency: It features a fixed 1.2MHz switching frequency, allowing the use of tiny inductors and capacitors.
3. Efficiency: High-efficiency operation is achieved with up to 88% efficiency possible, which helps in extending battery life for portable devices.
4. Output Voltage: Capable of generating a wide range of output voltages, including the ability to generate negative voltages.
5. Package: Available in a small 5-lead SOT-23 package, which is ideal for space-constrained designs.
6. Shutdown Mode: Includes a shutdown mode that reduces the supply current to less than 1µA.
7. Minimum External Components: The design requires few external components, simplifying the overall circuit design and reducing space and cost.
These features make the LT1931ES5 suitable for applications such as OLED displays, biasing for photodiodes, and powering small sensors.
Pinout
The LT1931ES5 is a fixed frequency step-up DC/DC converter designed by Linear Technology. It comes in a 5-pin SOT-23 package. Here is a brief overview of its pin configuration:
1. Pin 1 (SW): This is the switch pin. It connects to the inductor and the external Schottky diode.
2. Pin 2 (GND): This is the ground pin for the device.
3. Pin 3 (FB): This is the feedback pin. It monitors the output voltage for regulation. Connect it to a resistor divider network to set the desired output voltage.
4. Pin 4 (SHDN): This is the shutdown pin. Driving this pin low puts the device into shutdown mode, reducing the quiescent current to a minimum. Leaving it high enables normal operation.
5. Pin 5 (VIN): This is the input voltage pin. It supplies power to the device.
The LT1931ES5 is used for boosting lower input voltages to higher output voltages in various applications, such as powering portable devices or generating bias voltages.
1. Pin 1 (SW): This is the switch pin. It connects to the inductor and the external Schottky diode.
2. Pin 2 (GND): This is the ground pin for the device.
3. Pin 3 (FB): This is the feedback pin. It monitors the output voltage for regulation. Connect it to a resistor divider network to set the desired output voltage.
4. Pin 4 (SHDN): This is the shutdown pin. Driving this pin low puts the device into shutdown mode, reducing the quiescent current to a minimum. Leaving it high enables normal operation.
5. Pin 5 (VIN): This is the input voltage pin. It supplies power to the device.
The LT1931ES5 is used for boosting lower input voltages to higher output voltages in various applications, such as powering portable devices or generating bias voltages.
Manufacturer
The LT1931ES5 is manufactured by Analog Devices, Inc. This company is known for designing and manufacturing a wide range of analog, mixed-signal, and digital signal processing (DSP) integrated circuits used in electronic equipment. Analog Devices serves various industries, including communications, computer, industrial, instrumentation, military, aerospace, automotive, and consumer electronics. The company is recognized for its innovation and high-quality products in the field of analog technology.
Application
The LT1931ES5 is a DC-DC converter, specifically a step-up converter, that can be used in various applications. These include generating high voltage from low-voltage sources, powering OLED displays, driving white LEDs in portable devices, biasing photodiodes, and supplying power to sensors and microcontrollers. Its compact design and high efficiency make it suitable for battery-powered applications, such as portable medical devices, handheld communications, and industrial instruments. The component's ability to function effectively in low-voltage conditions makes it ideal for applications that require efficient power conversion in small form factors.
Package
The LT1931ES5 is a DC/DC converter from Analog Devices, formerly Linear Technology. It comes in a small SOT-23-5 package, which is a surface-mount package type with 5 pins.
