Overview
The LM5122MH/NOPB is a high-performance, multi-phase capable synchronous boost controller designed by Texas Instruments. This device is intended for high-efficiency synchronous boost regulator applications, particularly where high voltage outputs are required from lower voltage sources. The LM5122MH/NOPB operates with a wide input voltage range of 3V to 65V and can produce output voltages up to 100V. It features peak-current-mode control, which provides inherent line feed forward, cycle-by-cycle current limiting, and ease of loop compensation. The controller is packaged in a thermally enhanced 20-pin HTSSOP, making it suitable for applications requiring high reliability and efficiency.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LM5122MH/NOPB |
| Supply Voltage Min | 4.5V (3V for operation, 4.5V for start-up) |
| Supply Voltage Max | 65V |
| No. of Outputs | 1 |
| Duty Cycle (%) | 100% |
| Controller IC Case Style | HTSSOP |
| No. of Pins | 20 |
| Switching Frequency | Up to 1 MHz |
| Topology | Synchronous Boost (Step Up) |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 125°C |
| Output Current | 15A |
| RoHS Phthalates Compliant | Yes |
| MSL | MSL 1 - Unlimited |
Key Features
- Peak-current-mode control with inherent line feed forward and cycle-by-cycle current limiting
- Programmable switching frequency up to 1 MHz and free-run or synchronizable switching
- Robust 3-A integrated gate drivers with adaptive dead-time control
- User-selectable diode-emulation mode for discontinuous-mode operation
- Internal charge pump for 100% duty cycle operation (bypass operation)
- Thermal shutdown protection and hiccup-mode overload protection
- Programmable cycle-by-cycle current limit and programmable soft start
- Low shutdown quiescent current: 9 µA
- Programmable slope compensation and skip-cycle mode to reduce standby power
- Multi-phase capability with 180° phase shifted clock output
- Thermally enhanced 20-pin HTSSOP package
Applications
The LM5122MH/NOPB is versatile and suitable for a range of applications that require high voltage outputs from lower voltage sources. These include:
- Automotive systems requiring high-efficiency boost converters
- Industrial power supplies needing wide input voltage ranges
- Renewable energy systems, such as solar or wind power
- Medical devices requiring reliable and efficient power conversion
- Telecommunication equipment and data centers
Q & A
- What is the input voltage range of the LM5122MH/NOPB?
The input voltage range is from 3V to 65V, with a start-up voltage of 4.5V.
- What is the maximum output voltage of the LM5122MH/NOPB?
The maximum output voltage is up to 100V.
- What is the switching frequency range of the LM5122MH/NOPB?
The switching frequency is programmable up to 1 MHz.
- Does the LM5122MH/NOPB support multi-phase operation?
Yes, it supports multi-phase operation with a 180° phase shifted clock output.
- What is the package type of the LM5122MH/NOPB?
The device is packaged in a thermally enhanced 20-pin HTSSOP.
- Is the LM5122MH/NOPB RoHS compliant?
Yes, the LM5122MH/NOPB is RoHS phthalates compliant.
- What are the key protection features of the LM5122MH/NOPB?
The key protection features include thermal shutdown, hiccup-mode overload protection, and programmable cycle-by-cycle current limit.
- Can the LM5122MH/NOPB operate in bypass mode?
Yes, it can operate in bypass mode (VOUT = VIN) using an internal charge pump for 100% duty cycle operation.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is 9 µA.
- Is the LM5122MH/NOPB suitable for automotive applications?
Yes, it is suitable for automotive applications due to its wide input voltage range and high reliability.
