Overview
The LM5085MMX/NOPB is a high-efficiency PFET switching regulator controller produced by Texas Instruments. This controller is designed to facilitate the development of small, efficient buck regulators for a wide range of applications. It features a constant on-time (COT) control scheme, which allows for a relatively constant switching frequency across varying input voltages. The LM5085MMX/NOPB is particularly useful in scenarios requiring high input voltage ranges and efficient power conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range (VIN) | 4.5V to 75V |
| Output Voltage Range (VOUT) | 1.25V to 75V |
| Maximum Output Current (Iout) | 10A |
| Typical Quiescent Current (Iq) | 1.3mA |
| Switching Frequency Range | 50kHz to 1000kHz |
| Maximum Duty Cycle | 100% |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | VSSOP (8-pin) |
| Package Dimensions | 3mm x 3mm x 0.97mm |
Key Features
- Constant On-Time Control: Ensures a relatively constant switching frequency across varying input voltages, enhancing stability and efficiency.
- Wide Input Voltage Range: Supports input voltages from 4.5V to 75V, making it versatile for various applications.
- High Efficiency: Optimized for high efficiency, especially in continuous conduction mode, and maintains efficiency at light loads through reduced switching losses.
- Adjustable Current Limit: Allows for adjustable current limiting to protect the system from overcurrent conditions.
- Enable Function: Features an enable pin for easy control of the regulator's operation.
- Frequency Synchronization: Supports frequency synchronization to align with other system clocks or to reduce EMI.
- Thermal Shutdown and Over-Voltage Protection: Includes thermal shutdown and over-voltage protection to ensure reliable operation and prevent damage.
Applications
- Automotive Systems: Suitable for automotive infotainment systems and other automotive applications due to its AEC-Q100 Grade 1 qualification.
- Battery and Super Capacitor Chargers: Can be used in charging circuits for batteries and super capacitors.
- LED Drivers: Effective in LED driver applications requiring high efficiency and adjustable output.
- General Power Supplies: Applicable in various power supply designs where high input voltage range and efficiency are required.
Q & A
- What is the input voltage range of the LM5085MMX/NOPB?
The input voltage range is from 4.5V to 75V.
- What is the maximum output current of the LM5085MMX/NOPB?
The maximum output current is 10A.
- What is the typical quiescent current of the LM5085MMX/NOPB?
The typical quiescent current is 1.3mA.
- What is the switching frequency range of the LM5085MMX/NOPB?
The switching frequency range is from 50kHz to 1000kHz.
- What is the maximum duty cycle of the LM5085MMX/NOPB?
The maximum duty cycle is 100%.
- What are the key features of the constant on-time control scheme in the LM5085MMX/NOPB?
The constant on-time control scheme ensures a relatively constant switching frequency, enhances stability, and does not require loop compensation, resulting in fast load transient response.
- What types of protection does the LM5085MMX/NOPB offer?
The LM5085MMX/NOPB offers thermal shutdown and over-voltage protection.
- What are some common applications of the LM5085MMX/NOPB?
Common applications include automotive systems, battery and super capacitor chargers, LED drivers, and general power supplies.
- What is the operating temperature range of the LM5085MMX/NOPB?
The operating temperature range is from -40°C to 125°C.
- What package types are available for the LM5085MMX/NOPB?
The LM5085MMX/NOPB is available in VSSOP (8-pin) and other package types such as HVSSOP and WSON.
