Overview
The Texas Instruments LM5085MY/NOPB is a high-efficiency PFET switching regulator controller designed to facilitate the development of small and efficient buck regulators. This controller operates over a wide input voltage range of 4.5V to 75V, making it versatile for various applications. It features a constant on-time regulation principle, which simplifies circuit implementation and results in ultra-fast load transient response. The LM5085MY/NOPB is packaged in an 8-pin MSOP (HVSSOP) and is suitable for surface mount applications.
Key Specifications
| Type | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LM5085MY/NOPB |
| Package | MSOP-8 (HVSSOP) |
| Number of Outputs | 1 |
| Topology | Step-down (Buck) |
| Switching Frequency | Up to 1 MHz |
| Minimum Input Voltage | 4.5 V |
| Maximum Input Voltage | 75 V |
| Minimum Output Voltage | 1.25 V |
| Maximum Output Current | 10 A |
| Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +125°C |
| Dimensions | 3 x 3 x 0.86 mm |
Key Features
- Wide 4.5-V to 75-V input voltage range
- Adjustable current limit using RDS(ON) or a current sense resistor
- Programmable switching frequency up to 1 MHz
- No loop compensation required
- Ultra-fast transient response
- Nearly constant operating frequency with line and load variations
- Adjustable output voltage from 1.25 V
- Precision ±2% feedback reference
- Capable of 100% duty cycle operation
- Internal soft-start timer
- Integrated high voltage bias regulator
- Thermal shutdown
Applications
The LM5085MY/NOPB is suitable for a wide range of applications where high efficiency and reliability are crucial. These include but are not limited to:
- Industrial power supplies
- Automotive systems (though the LM5085MY/NOPB itself is not AEC-Q100 qualified, the LM5085-Q1 variant is)
- Telecommunications equipment
- Server and data center power supplies
- High-power DC-DC converters
Q & A
- What is the input voltage range of the LM5085MY/NOPB?
The input voltage range is from 4.5 V to 75 V. - What is the maximum switching frequency of the LM5085MY/NOPB?
The maximum switching frequency is up to 1 MHz. - What is the package type of the LM5085MY/NOPB?
The package type is MSOP-8 (HVSSOP). - What is the minimum output voltage of the LM5085MY/NOPB?
The minimum output voltage is 1.25 V. - Does the LM5085MY/NOPB require loop compensation?
No, it does not require loop compensation. - What is the maximum output current of the LM5085MY/NOPB?
The maximum output current is 10 A. - What are the operating temperature ranges for the LM5085MY/NOPB?
The operating temperature range is from -40°C to +125°C. - Is the LM5085MY/NOPB RoHS compliant?
Yes, it is RoHS compliant. - What is the typical quiescent current of the LM5085MY/NOPB?
The specific value is not provided in the general specifications, but it can be found in the detailed datasheet. - Does the LM5085MY/NOPB have thermal shutdown protection?
Yes, it has thermal shutdown protection.
