Overview
The LM5010SD/NOPB is a high-voltage, 1-A step-down switching regulator produced by Texas Instruments. This regulator is designed to implement a low-cost, efficient buck bias regulator capable of supplying in excess of 1-A load current. It features a hysteretic regulation scheme that requires no loop compensation, resulting in fast load transient response and simplified circuit implementation. The LM5010 is available in thermally enhanced 10-pin WSON and 14-pin HTSSOP packages, making it suitable for various high-voltage applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 8 to 75 | V |
| Output Current | 1 | A |
| Switching Frequency | Up to 1 MHz | |
| Valley Current Limit | 1.25 A | |
| Operating Junction Temperature | -40 to 125 | °C |
| Package Type | WSON (10-pin), HTSSOP (14-pin) | |
| Feedback Reference Voltage | 2.5 V | |
| RDS(ON) of Buck Switch | 0.35 to 0.8 Ω | |
| Thermal Shutdown Temperature | Typically 175°C |
Key Features
- Input Voltage Range: 8 V to 75 V
- 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
- High Efficiency Point-of-Load (POL) Regulator
- Non-Isolated Telecommunications Buck Regulator
- Secondary High Voltage Post Regulator
- Automotive Systems, particularly 42-V automotive power bus
Q & A
- What is the input voltage range of the LM5010SD/NOPB?
The input voltage range is from 8 V to 75 V. - What is the maximum output current of the LM5010SD/NOPB?
The maximum output current is 1 A. - What is the switching frequency range of the LM5010SD/NOPB?
The switching frequency can exceed 1 MHz. - Does the LM5010SD/NOPB require loop compensation?
No, it does not require loop compensation due to its hysteretic regulation scheme. - What is the valley current limit of the LM5010SD/NOPB?
The valley current limit is set at 1.25 A. - What are the available package types for the LM5010SD/NOPB?
The available package types are 10-pin WSON and 14-pin HTSSOP. - What is the feedback reference voltage of the LM5010SD/NOPB?
The feedback reference voltage is 2.5 V. - How does the thermal shutdown feature work in the LM5010SD/NOPB?
The thermal shutdown feature activates at a junction temperature of typically 175°C, disabling the buck switch and the ON timer, and grounding the soft-start pin to prevent overheating. - Can the LM5010SD/NOPB be remotely shut down?
Yes, it can be remotely shut down by taking the RON/SD pin below 0.65 V. - What are some common applications of the LM5010SD/NOPB?
Common applications include high efficiency point-of-load regulators, non-isolated telecommunications buck regulators, secondary high voltage post regulators, and automotive systems.
