Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputType | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| OutputConfiguration | Positive |
| Topology | Boost, Flyback, SEPIC |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 2.97V ~ 45V |
| Frequency-Switching | 100kHz ~ 2.2MHz |
| DutyCycle(Max) | 93% |
| SynchronousRectifier | No |
| ClockSync | Yes |
| ControlFeatures | Soft Start |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 12-WFDFN Exposed Pad |
Overview
Description
The LM5155DSSR is a high-performance, wide-input voltage, non-synchronous boost controller from Texas Instruments. Designed for efficient DC-DC conversion, it is suitable for applications requiring a step-up in voltage. This controller supports a wide input voltage range from 3.5V to 42V and can generate output voltages up to 120V, making it versatile for various industrial and automotive uses.
Key features include low shutdown current, programmable switching frequency, and adjustable soft start, which enhance its efficiency and flexibility. The LM5155DSSR also integrates advanced protection features, such as cycle-by-cycle current limiting, thermal shutdown, and input undervoltage lockout, ensuring robust operation under different conditions.
The device is housed in a small VSSOP package, facilitating compact design implementations. Its ease of use and reliable performance make it ideal for applications like telecom power supplies, battery-powered devices, and LED drivers. The LM5155DSSR provides a cost-effective solution for engineers looking to develop efficient power supply systems.
Key features include low shutdown current, programmable switching frequency, and adjustable soft start, which enhance its efficiency and flexibility. The LM5155DSSR also integrates advanced protection features, such as cycle-by-cycle current limiting, thermal shutdown, and input undervoltage lockout, ensuring robust operation under different conditions.
The device is housed in a small VSSOP package, facilitating compact design implementations. Its ease of use and reliable performance make it ideal for applications like telecom power supplies, battery-powered devices, and LED drivers. The LM5155DSSR provides a cost-effective solution for engineers looking to develop efficient power supply systems.
Equivalent
The LM5155DSSR is a DC-DC boost controller. Equivalent products include:
1. LT3759 by Analog Devices - A boost/inverting DC-DC controller.
2. NCP3063 by ON Semiconductor - A boost/inverting converter.
3. TPS40210 by Texas Instruments - A wide input range boost controller.
4. MAX1771 by Maxim Integrated - A boost controller with low quiescent current.
These alternatives vary by features, so compatibility with specific applications should be verified.
1. LT3759 by Analog Devices - A boost/inverting DC-DC controller.
2. NCP3063 by ON Semiconductor - A boost/inverting converter.
3. TPS40210 by Texas Instruments - A wide input range boost controller.
4. MAX1771 by Maxim Integrated - A boost controller with low quiescent current.
These alternatives vary by features, so compatibility with specific applications should be verified.
Features
The LM5155DSSR is a versatile boost controller from Texas Instruments designed for both isolated and non-isolated DC-DC converter applications. Key features include:
1. Wide Input Voltage Range: It operates over a broad input voltage range, making it suitable for various applications.
2. High Efficiency: Features a low-side N-channel MOSFET gate driver and optional diode emulation mode for improved efficiency at light loads.
3. Adjustable Frequency: The switching frequency is programmable, allowing optimization for efficiency and size.
4. Internal Compensation: Simplifies design by integrating compensation components.
5. Synchronization Capability: Can be synchronized to an external clock for improved EMI performance.
6. Protection Features: Includes cycle-by-cycle current limit, thermal shutdown, and undervoltage lockout to ensure system reliability.
7. Soft Start: Programmable soft start feature to control inrush current during startup.
8. Package and Size: Available in a small, thermally-enhanced 10-pin VSSOP package for compact design implementations.
These features make the LM5155DSSR suitable for power supply designs in industrial, automotive, and consumer electronics applications.
1. Wide Input Voltage Range: It operates over a broad input voltage range, making it suitable for various applications.
2. High Efficiency: Features a low-side N-channel MOSFET gate driver and optional diode emulation mode for improved efficiency at light loads.
3. Adjustable Frequency: The switching frequency is programmable, allowing optimization for efficiency and size.
4. Internal Compensation: Simplifies design by integrating compensation components.
5. Synchronization Capability: Can be synchronized to an external clock for improved EMI performance.
6. Protection Features: Includes cycle-by-cycle current limit, thermal shutdown, and undervoltage lockout to ensure system reliability.
7. Soft Start: Programmable soft start feature to control inrush current during startup.
8. Package and Size: Available in a small, thermally-enhanced 10-pin VSSOP package for compact design implementations.
These features make the LM5155DSSR suitable for power supply designs in industrial, automotive, and consumer electronics applications.
Pinout
The LM5155DSSR is a boost controller from Texas Instruments. It comes in a 10-pin package known as the WSON (DSC) package. The primary function of the LM5155 is to operate as a high-performance, wide input voltage range synchronous boost controller.
Here's a brief overview of the pin functions:
1. VIN: Input voltage supply pin.
2. EN/UVLO: Enable and undervoltage lockout pin.
3. FB: Feedback input for regulating output voltage.
4. COMP: Compensation network connection.
5. RT/SYNC: Resistor timing or synchronization input.
6. GND: Ground pin.
7. SW: Switch node connection.
8. CS: Current sense input for overcurrent protection.
9. VCC: Internal bias supply output.
10. DRV: Gate drive output for the external MOSFET.
These pins collectively support the device's main role as a boost controller, enabling efficient power conversion suitable for various industrial and automotive applications.
Here's a brief overview of the pin functions:
1. VIN: Input voltage supply pin.
2. EN/UVLO: Enable and undervoltage lockout pin.
3. FB: Feedback input for regulating output voltage.
4. COMP: Compensation network connection.
5. RT/SYNC: Resistor timing or synchronization input.
6. GND: Ground pin.
7. SW: Switch node connection.
8. CS: Current sense input for overcurrent protection.
9. VCC: Internal bias supply output.
10. DRV: Gate drive output for the external MOSFET.
These pins collectively support the device's main role as a boost controller, enabling efficient power conversion suitable for various industrial and automotive applications.
Manufacturer
The LM5155DSSR is manufactured by Texas Instruments (TI). Texas Instruments is an American technology company that designs and manufactures semiconductors and various integrated circuits. It primarily focuses on the production of analog chips and embedded processors, which are used in electronic devices across numerous industries, including consumer electronics, automotive, industrial, and communications equipment. TI is known for its innovation and contributions to the electronics industry, maintaining a strong presence in the global semiconductor market.
Application
The LM5155DSSR is a high-performance boost converter controller typically used in applications requiring efficient voltage step-up. Key areas include:
1. Automotive Systems: Provides power for infotainment, ADAS, and lighting systems.
2. Telecommunications: Powers network equipment, routers, and base stations.
3. Industrial Equipment: Supplies voltage for factory automation, sensors, and control systems.
4. Consumer Electronics: Used in devices needing battery voltage boosting, like portable chargers.
5. Renewable Energy: Supports solar micro-inverters and other renewable energy systems.
6. Medical Devices: Powers portable and stationary medical equipment.
Its wide input voltage range and high efficiency make it versatile for various power management applications.
1. Automotive Systems: Provides power for infotainment, ADAS, and lighting systems.
2. Telecommunications: Powers network equipment, routers, and base stations.
3. Industrial Equipment: Supplies voltage for factory automation, sensors, and control systems.
4. Consumer Electronics: Used in devices needing battery voltage boosting, like portable chargers.
5. Renewable Energy: Supports solar micro-inverters and other renewable energy systems.
6. Medical Devices: Powers portable and stationary medical equipment.
Its wide input voltage range and high efficiency make it versatile for various power management applications.
Package
The LM5155DSSR is a DC/DC boost converter from Texas Instruments, and it comes in a small outline transistor (SOT) package, specifically a 10-pin WSON (DSBGA) package. This compact packaging helps in efficient heat dissipation and is suitable for space-constrained applications.
