Specifications
| Attribute | Value |
| Package / Case | Tube |
| Part Status | Obsolete |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 2 |
| Voltage - Input (Min) | 3.8V |
| Voltage - Input (Max) | 36V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Max) | 36V |
| Current - Output | 800mA |
| Frequency - Switching | 500kHz ~ 2.1MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
Overview
Description
The LT3688IFE is a dual-channel step-down switching regulator designed by Analog Devices, formerly Linear Technology. It is tailored for applications that require efficient power conversion from higher voltage sources to lower output voltages. Each channel of the LT3688 can deliver up to 800 mA of continuous output current, making it suitable for powering a wide range of devices and circuits.
Key features of the LT3688IFE include a wide input voltage range of 3.6V to 36V, which allows it to operate with a variety of power sources, including automotive, industrial, and battery-powered systems. The device also incorporates a high switching frequency of up to 2.5 MHz, enabling the use of smaller external components and reducing overall solution size.
The LT3688IFE offers high efficiency, typically over 90%, and includes built-in protection features such as thermal shutdown and current limiting to enhance reliability. Its compact footprint and ease of use make it a popular choice for designers looking for a robust and flexible power management solution.
Key features of the LT3688IFE include a wide input voltage range of 3.6V to 36V, which allows it to operate with a variety of power sources, including automotive, industrial, and battery-powered systems. The device also incorporates a high switching frequency of up to 2.5 MHz, enabling the use of smaller external components and reducing overall solution size.
The LT3688IFE offers high efficiency, typically over 90%, and includes built-in protection features such as thermal shutdown and current limiting to enhance reliability. Its compact footprint and ease of use make it a popular choice for designers looking for a robust and flexible power management solution.
Equivalent
The LT3688IFE is a dual step-down DC/DC converter. Equivalent products include the Texas Instruments TPS54260, the STMicroelectronics L5973D, and the Maxim Integrated MAX16909. These alternatives provide similar functionalities in voltage regulation and power management for various applications. It is essential to verify the specific requirements like input voltage range, output current capability, and additional features like thermal performance to ensure compatibility with the original design.
Features
The LT3688IFE is a high-performance dual step-down switching regulator from Analog Devices. Key features include:
1. Dual Output: It supports two independent output channels, enabling efficient power management for multiple loads.
2. Wide Input Voltage Range: Operates with input voltages from 3V to 36V, suitable for automotive and industrial applications.
3. High Efficiency: Delivers high efficiency over a wide load range with low quiescent current.
4. Adjustable Frequency: The switching frequency can be set between 250kHz and 2.2MHz, allowing optimization for size and efficiency.
5. Synchronization Capability: Can be synchronized to an external clock for noise-sensitive applications.
6. Current Mode Control: Ensures fast transient response and easy loop compensation.
7. Integrated Soft-Start: Soft-start capability minimizes inrush current during startup.
8. Protection Features: Includes overcurrent, overvoltage, and thermal shutdown protections for enhanced reliability.
9. Compact Packaging: Available in a thermally enhanced 28-lead TSSOP package, facilitating compact designs.
These features make the LT3688IFE suitable for a variety of applications requiring robust and efficient power conversion.
1. Dual Output: It supports two independent output channels, enabling efficient power management for multiple loads.
2. Wide Input Voltage Range: Operates with input voltages from 3V to 36V, suitable for automotive and industrial applications.
3. High Efficiency: Delivers high efficiency over a wide load range with low quiescent current.
4. Adjustable Frequency: The switching frequency can be set between 250kHz and 2.2MHz, allowing optimization for size and efficiency.
5. Synchronization Capability: Can be synchronized to an external clock for noise-sensitive applications.
6. Current Mode Control: Ensures fast transient response and easy loop compensation.
7. Integrated Soft-Start: Soft-start capability minimizes inrush current during startup.
8. Protection Features: Includes overcurrent, overvoltage, and thermal shutdown protections for enhanced reliability.
9. Compact Packaging: Available in a thermally enhanced 28-lead TSSOP package, facilitating compact designs.
These features make the LT3688IFE suitable for a variety of applications requiring robust and efficient power conversion.
Pinout
The LT3688IFE is a dual monolithic step-down regulator from Analog Devices. It comes in a thermally enhanced 28-lead TSSOP package with an exposed pad. The primary function of the LT3688IFE is to convert higher input voltages into lower output voltages with high efficiency and low noise, suitable for powering a wide range of applications including industrial, automotive, and communications systems.
The device features two independent switching regulators, allowing for flexible configuration and precise control over the output voltages. It supports input voltages from 3.6V to 36V and can deliver up to 800mA of output current per channel. Other features include a high switching frequency, internal compensation, soft-start functionality, and a power good indicator. The LT3688IFE is designed for ease of use and optimized for application robustness and efficiency.
The device features two independent switching regulators, allowing for flexible configuration and precise control over the output voltages. It supports input voltages from 3.6V to 36V and can deliver up to 800mA of output current per channel. Other features include a high switching frequency, internal compensation, soft-start functionality, and a power good indicator. The LT3688IFE is designed for ease of use and optimized for application robustness and efficiency.
Manufacturer
The LT3688IFE is manufactured by Analog Devices, Inc. Analog Devices is a multinational semiconductor company that specializes in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company provides products and solutions for a wide range of applications, including industrial, automotive, communication, and consumer electronics. Known for its innovation in signal processing technologies, Analog Devices serves a diverse set of industries by offering components that improve performance and efficiency in electronic systems.
Application
The LT3688IFE is a dual-channel, step-down switching regulator designed for automotive and industrial applications. It is commonly used in areas requiring efficient power conversion, such as automotive electronic control units (ECUs), infotainment systems, and industrial automation equipment. Its wide input voltage range and robust design make it suitable for battery-powered devices, telecommunications equipment, and distributed power systems. The LT3688IFE provides reliable performance under harsh conditions, making it ideal for environments where stability and efficiency are critical. Additionally, its compact size and high efficiency are beneficial in space-constrained applications.
Package
The LT3688IFE is available in a 28-lead TSSOP (Thermally Enhanced Thin Shrink Small Outline Package) with an exposed pad for better heat dissipation.
