Overview
The LM5085MM/NOPB is a high-efficiency PFET switching regulator controller produced by Texas Instruments. This component is designed to facilitate the development of small and 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 LM5085MM/NOPB is particularly useful in scenarios requiring high input voltage ranges and fast load transient response.
Key Specifications
| Parameter | Value |
|---|---|
| Control Mode | Constant on-time (COT) |
| Duty Cycle (Max) | 100% |
| Maximum Output Current | 10 A |
| Quiescent Current (Typ) | 1.3 mA |
| Number of Phases | 1 |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | VSSOP |
| Input Voltage Range | 4.5 V to 75 V |
| Output Voltage Range | 1.25 V to 75 V |
| Switching Frequency Range | 50 kHz to 1000 kHz |
| Special Features | Adjustable Current Limit, Enable, Frequency Synchronization |
Key Features
- Wide input voltage range of 4.5 V to 75 V, making it suitable for various high-voltage applications.
- Constant on-time control scheme, which maintains a relatively constant switching frequency across different input voltages.
- 100% duty cycle operation to extend the regulation range at low input voltages.
- Adjustable current limit, enable, and frequency synchronization features.
- High efficiency with minimal loop compensation required due to the COT control scheme.
- Available in VSSOP, HVSSOP, and WSON packages with exposed pads for improved heat dissipation.
Applications
- Automotive infotainment systems.
- Battery and super capacitor chargers.
- LED drivers.
- Other high-voltage DC-DC conversion applications requiring high efficiency and fast transient response.
Q & A
- What is the input voltage range of the LM5085MM/NOPB?
The input voltage range is from 4.5 V to 75 V. - What is the maximum output current of the LM5085MM/NOPB?
The maximum output current is 10 A. - What control scheme does the LM5085MM/NOPB use?
The LM5085MM/NOPB uses a constant on-time (COT) control scheme. - What are the special features of the LM5085MM/NOPB?
The special features include adjustable current limit, enable, and frequency synchronization. - What are the typical applications of the LM5085MM/NOPB?
Typical applications include automotive infotainment, battery and super capacitor chargers, and LED drivers. - What are the available package types for the LM5085MM/NOPB?
The available package types are VSSOP, HVSSOP, and WSON. - What is the operating temperature range of the LM5085MM/NOPB?
The operating temperature range is from -40°C to 125°C. - Does the LM5085MM/NOPB support 100% duty cycle operation?
Yes, it supports 100% duty cycle operation to extend the regulation range at low input voltages. - How does the COT control scheme benefit the LM5085MM/NOPB?
The COT control scheme maintains a relatively constant switching frequency and requires minimal loop compensation, resulting in very fast load transient response. - Is the LM5085MM/NOPB RoHS compliant?
Yes, the LM5085MM/NOPB is RoHS compliant.
