LT1935ES5

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Switching Voltage Regulators LT1935 - 1.2MHz Boost DC/DC Converter in ThinSOT with 2A Switch

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Description

The LT1935ES5 is a high-efficiency, step-up DC/DC converter developed by Analog Devices, formerly Linear Technology. It is designed for applications requiring high voltage outputs and is capable of boosting voltages up to 34V from an input as low as 2.3V. The device operates with a switching frequency of 1.2MHz, allowing the use of tiny surface-mount components and inductors, facilitating compact designs.
Key features include an internal 1.6A switch, 400mV feedback voltage, and a low shutdown current of less than 1µA, enhancing energy efficiency. The LT1935ES5 is typically used in applications such as OLED displays, bias supplies for LCD panels, and other portable electronic devices. It also includes internal compensation, eliminating the need for external components, and features soft-start and current limiting to ensure reliable operation.
Encased in a compact SOT-23 package, the LT1935ES5 is an ideal choice for space-constrained applications where both high performance and efficiency are crucial.

Equivalent

The LT1935ES5 is a high-voltage boost converter from Analog Devices (formerly Linear Technology). Equivalent products to consider are the Texas Instruments TPS61040, Maxim Integrated MAX1771, and the Microchip Technology MCP1640. These alternatives also serve as boost converters with similar voltage and current specifications, albeit with varying features and performance parameters. Always check the datasheets for each part to ensure compatibility with your specific application requirements.

Features

The LT1935ES5 is a high-voltage boost converter by Linear Technology, designed for applications requiring stepping up input voltage to higher levels. Here are its key features:
1. Wide Input Voltage Range: Operates from 3.2V to 20V, accommodating various power supply sources.
2. High Output Voltage: Capable of generating output voltages up to 34V.
3. High Efficiency: Uses a 36V, 2A power switch to deliver high efficiency in boost converter configurations.
4. Low Quiescent Current: Minimizes power consumption when the device is idle, benefiting battery-powered applications.
5. Compact Package: Available in a compact 5-lead TSOT-23 package, suitable for space-constrained designs.
6. Current Mode Control: Provides good line and load regulation and fast transient response.
7. Integrated Protection: Features like over-temperature protection and cycle-by-cycle current limit enhance reliability.
8. Flexible Frequency: Operates at a fixed frequency of 1.2MHz, enabling the use of small external components.
9. Applications: Ideal for LCD bias supplies, local 5V or 12V supplies, and general-purpose boost converters.
These features make the LT1935ES5 a versatile choice for applications needing efficient voltage boosting.

Pinout

The LT1935ES5 is a high-voltage boost converter that typically comes in a 5-pin SOT-23 package. Here is a brief overview of its pin functions:
1. SW (Pin 1): This is the switch pin, where the inductor is connected.
2. GND (Pin 2): This is the ground pin and serves as the reference point for the circuit.
3. FB (Pin 3): This pin is used for feedback to regulate the output voltage. It connects to a resistor divider that senses the output voltage.
4. SHDN (Pin 4): This is the shutdown pin, used to enable or disable the device. Pulling this pin low disables the converter.
5. VIN (Pin 5): This is the input voltage pin that supplies power to the device.
The LT1935ES5 is designed for applications requiring a compact and efficient boost converter, capable of stepping up input voltages to a higher level with a switch current limit.

Manufacturer

The LT1935ES5 is manufactured by Analog Devices, Inc. Analog Devices is a multinational company that specializes in the design and manufacturing of semiconductor products, particularly analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company provides solutions for a wide range of industries, including automotive, communication, consumer electronics, healthcare, and industrial automation. Analog Devices is known for its high-performance electronic components that drive innovative technologies and systems.

Application

The LT1935ES5 is a high-efficiency step-up DC/DC converter. Its application areas include:
1. OLED/LCD Displays: Used for biasing in portable devices like smartphones and tablets.
2. Battery-Powered Devices: Ideal for devices requiring high voltage from low-voltage batteries, such as cameras and flashlights.
3. Industrial Systems: Used in sensors and other components needing voltage boosts.
4. Telecommunications: Powers RF amplifiers and other high-frequency devices.
5. Medical Instruments: Provides stable voltage for portable medical equipment.
6. Automotive: Used in powering sensors and display units in vehicles.
Its compact design and efficiency make it suitable for space-constrained applications.

Package

The LT1935ES5 is packaged in a 5-lead Small Outline Transistor (SOT-23) package.

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