Overview
The LM5010SDX/NOPB is a high-voltage, 1-A step-down switching regulator produced by Texas Instruments. This regulator is designed to provide a low-cost, efficient solution for buck bias power conversion. It features an integrated N-channel buck switch and is available in thermally enhanced 10-pin WSON and 14-pin HTSSOP packages. The LM5010 is well-suited for applications requiring the regulation of high input voltages down to a lower output voltage, with a hysteretic regulation scheme that eliminates the need for loop compensation, resulting in fast load transient response and simplified circuit implementation.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 8 V to 75 V |
| Output Current | Up to 1 A |
| Switching Frequency | Can exceed 1 MHz |
| Valley Current Limit | 1.25 A |
| Package Type | 10-pin WSON (DPR), 14-pin HTSSOP |
| Operating Temperature Range | -40°C to 125°C |
| Thermal Shutdown | Typically at 175°C |
| Feedback Reference | Precision 2.5-V |
Key Features
- Integrated N-Channel Buck Switch
- Integrated Start-Up Regulator
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Operating Frequency Remains Constant With Load and Line Variations
- Maximum Duty Cycle Limited During Start-Up
- Adjustable Output Voltage
- Precision 2.5-V Feedback Reference
- Thermal Shutdown
- Exposed Thermal Pad for Improved Heat Dissipation
- VCC Undervoltage Lockout, Gate Drive Undervoltage Lockout
Applications
The LM5010 is suitable for various high-voltage applications, including:
- 48-V telecom power bus
- 42-V automotive power bus
- Industrial power supplies
- High-voltage DC-DC conversion
Q & A
- What is the input voltage range of the LM5010?
The input voltage range of the LM5010 is from 8 V to 75 V.
- What is the maximum output current of the LM5010?
The LM5010 can supply up to 1 A of load current.
- What type of packages is the LM5010 available in?
The LM5010 is available in 10-pin WSON (DPR) and 14-pin HTSSOP packages.
- Does the LM5010 require loop compensation?
No, the LM5010 does not require loop compensation due to its hysteretic regulation scheme.
- What is the thermal shutdown temperature of the LM5010?
The thermal shutdown typically occurs at 175°C.
- What are some key features of the LM5010?
Key features include an integrated N-channel buck switch, integrated start-up regulator, ultra-fast transient response, and adjustable output voltage.
- What are the typical applications of the LM5010?
The LM5010 is typically used in 48-V telecom and 42-V automotive power bus applications, as well as in industrial power supplies and high-voltage DC-DC conversion.
- How does the LM5010 handle load and line variations?
The operating frequency of the LM5010 remains constant with load and line variations due to the inverse relationship between the input voltage and the ON-time.
- What is the valley current limit of the LM5010?
The valley current limit of the LM5010 is set at 1.25 A.
- Does the LM5010 have any built-in protection features?
