Overview
The LM5085MYE/NOPB is a high-efficiency PFET switching regulator controller produced by Texas Instruments. This controller is designed to quickly and easily develop small, efficient buck regulators for a wide range of applications. It features a PFET gate driver and a high voltage bias regulator, operating over a wide input voltage range of 4.5V to 75V. The constant on-time regulation principle simplifies circuit implementation and results in ultra-fast load transient response. The LM5085MYE/NOPB is particularly useful in applications requiring high efficiency, low dropout voltage, and robust thermal management.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5V to 75V |
| Output Voltage Range | 1.25V to 75V |
| Maximum Output Current | 10A |
| Switching Frequency Range | 50kHz to 1MHz |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | HVSSOP-8, VSSOP-8, WSON-8 |
| Number of Pins | 8 |
| Quiescent Current (Typical) | 1.3mA |
| Duty Cycle (Maximum) | 100% |
| Feedback Reference Accuracy | ±2% |
Key Features
- AEC-Q100 Grade 1 Qualified for automotive applications
- Wide input voltage range of 4.5V to 75V
- Adjustable current limit using RDS(ON) or a current sense resistor
- Programmable switching frequency up to 1MHz
- No loop compensation required
- Ultra-fast transient response
- Nearly constant operating frequency with line and load variations
- Adjustable output voltage from 1.25V
- Capable of 100% duty cycle operation
- Internal soft-start timer
- Integrated high voltage bias regulator
- Thermal shutdown protection
Applications
The LM5085MYE/NOPB is suitable for a variety of applications, including:
- Automotive systems requiring high reliability and temperature tolerance
- Industrial power supplies needing high efficiency and low dropout voltage
- Telecommunication equipment requiring robust and efficient power management
- Consumer electronics demanding compact and efficient power solutions
- Constant current constant voltage (CC/CV) DC sources
- Non-invert buck-boost (Zeta) converters
Q & A
- What is the input voltage range of the LM5085MYE/NOPB?
The input voltage range is 4.5V to 75V. - What is the maximum output current of the LM5085MYE/NOPB?
The maximum output current is 10A. - What are the available package types for the LM5085MYE/NOPB?
The available package types are HVSSOP-8, VSSOP-8, and WSON-8. - Does the LM5085MYE/NOPB require loop compensation?
No, the LM5085MYE/NOPB does not require loop compensation due to its constant on-time regulation principle. - What is the operating temperature range of the LM5085MYE/NOPB?
The operating temperature range is -40°C to 125°C. - Can the LM5085MYE/NOPB operate at 100% duty cycle?
Yes, the LM5085MYE/NOPB is capable of 100% duty cycle operation. - How is the switching frequency of the LM5085MYE/NOPB adjusted?
The switching frequency can be programmed up to 1MHz. - What is the quiescent current of the LM5085MYE/NOPB?
The typical quiescent current is 1.3mA. - Does the LM5085MYE/NOPB have thermal shutdown protection?
Yes, it has thermal shutdown protection. - Is the LM5085MYE/NOPB AEC-Q100 qualified?
Yes, the LM5085MYE/NOPB is AEC-Q100 Grade 1 Qualified for automotive applications.
