Overview
The LM5121MH/NOPB is a high-performance, wide-input voltage range, step-up DC/DC switching regulator controller produced by Texas Instruments. This device operates from an input voltage between 4.5V and 65V and can provide a regulated output voltage up to 100V. It features a synchronous rectification control scheme, which enhances efficiency compared to traditional diode rectification. The LM5121MH/NOPB is designed for high-efficiency, high-power boost regulator applications and is suitable for a variety of industrial, automotive, and telecommunications applications.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer Part Number | LM5121MH/NOPB |
| Manufacturer | Texas Instruments |
| Input Voltage Range | 4.5V to 65V |
| Output Voltage Range | 3V to 100V |
| Switching Frequency | 50 kHz to 1 MHz |
| Maximum Duty Cycle | 100% |
| Maximum Output Current | 20 A |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | 20-HTSSOP |
| Special Features | Synchronous Rectification, Adjustable Current Limit, Frequency Synchronization, Light Load Efficiency, UVLO Adjustable, Thermal Shutdown |
Key Features
- Wide input voltage range: 4.5V to 65V, allowing for versatile applications.
- High switching frequency up to 1 MHz, enabling the use of small external components.
- Synchronous rectification control for improved efficiency.
- Frequency control and soft-start capabilities to manage inrush current and startup sequence.
- Thermal shutdown and other protection features such as current limiting, hiccup mode over load protection, and remote shutdown capability.
- Compact and space-saving surface mount 20-HTSSOP package.
- User-selectable diode emulation mode for improved efficiency at light load conditions.
- Disconnection switch control for true shutdown and inrush current control.
Applications
- Industrial automation and control equipment.
- Automotive electronics.
- Telecommunications equipment.
- Portable electronics and battery-powered devices.
Q & A
- What is the input voltage range of the LM5121MH/NOPB?
The input voltage range is between 4.5V and 65V.
- What is the maximum output voltage of the LM5121MH/NOPB?
The maximum output voltage is up to 100V.
- What is the switching frequency range of the LM5121MH/NOPB?
The switching frequency range is from 50 kHz to 1 MHz.
- Does the LM5121MH/NOPB support synchronous rectification?
Yes, it supports synchronous rectification for improved efficiency.
- What are the key protection features of the LM5121MH/NOPB?
The key protection features include thermal shutdown, current limiting, hiccup mode over load protection, and remote shutdown capability.
- What is the operating temperature range of the LM5121MH/NOPB?
The operating temperature range is from -40°C to 125°C.
- What package type does the LM5121MH/NOPB come in?
The device comes in a 20-HTSSOP package.
- Is the LM5121MH/NOPB suitable for automotive applications?
Yes, it is AEC-Q100 qualified and suitable for automotive electronics.
- Does the LM5121MH/NOPB have a disconnection switch control feature?
Yes, it has a disconnection switch control feature for true shutdown and inrush current control.
- What is the typical quiescent current of the LM5121MH/NOPB in shutdown mode?
The typical quiescent current in shutdown mode is 9 μA.
