Overview
The LM5009SDC is a step-down switching regulator produced by National Semiconductor, now part of Texas Instruments. This regulator is designed to implement a low-cost and efficient buck bias power converter. It features an integrated N-channel MOSFET and is capable of driving a 150-mA load current from a 9.5-V to 95-V input source. The device operates using a hysteretic control scheme, which ensures a constant operating frequency over various load and input voltage conditions without the need for loop compensation. This results in an ultra-fast transient response, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | MSOP-8, LLP-8 (4mm x 4mm), 8-WSON |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 9.5V to 95V |
| Output Voltage Range | 2.5V to 85V |
| Output Current Capability | 150 mA |
| Switching Frequency | Up to 600 kHz |
| Feedback Voltage Accuracy | 2% accurate 2.5V from -40°C to 125°C |
| Topology | Buck (Step Down) |
| Synchronous Rectifier | No |
| Mounting Type | Surface Mount |
Key Features
- Integrated N-channel MOSFET
- Guaranteed 150 mA output current capability
- Ultra-fast transient response
- No loop compensation required
- VIN feed forward provides constant operating frequency
- Highly efficient operation
- 2% accurate 2.5V feedback from -40°C to 125°C
- Internal startup regulator
- Intelligent current limit protection
- External shutdown control
- Thermal shutdown
- VCC under-voltage lockout and gate drive under-voltage lockout
- Maximum duty cycle limiter
Applications
- Heat sink eliminator for classic linear regulator applications
- 12V, 24V, 36V, and 48V rectified AC systems
- 42V Automotive power bus
- Non-isolated AC mains charge coupled supplies
- LED Current Source
Q & A
- What is the input voltage range of the LM5009SDC?
The input voltage range of the LM5009SDC is from 9.5V to 95V.
- What is the maximum output current capability of the LM5009SDC?
The LM5009SDC can deliver up to 150 mA of output current.
- What is the switching frequency of the LM5009SDC?
The switching frequency of the LM5009SDC can exceed 600 kHz.
- Does the LM5009SDC require loop compensation?
No, the LM5009SDC does not require loop compensation due to its hysteretic control scheme.
- What are the package options for the LM5009SDC?
The LM5009SDC is available in MSOP-8, LLP-8 (4mm x 4mm), and 8-WSON packages.
- What is the operating temperature range of the LM5009SDC?
The operating temperature range of the LM5009SDC is from -40°C to 125°C.
- Does the LM5009SDC have thermal shutdown protection?
- What type of feedback voltage accuracy does the LM5009SDC offer?
The LM5009SDC offers 2% accurate 2.5V feedback from -40°C to 125°C.
- Can the LM5009SDC be used in automotive applications?
- Does the LM5009SDC have intelligent current limit protection?
