Overview
The LM25007MMX from Texas Instruments is a monolithic step-down switching regulator designed to implement a low-cost, efficient power supply. This device is capable of driving a 0.5A load over an input voltage range of 9V to 42V. It is available in small VSSOP-8 and thermally enhanced WSON-8 packages, making it suitable for a variety of applications. The LM25007 features ultra-fast transient response achieved through a constant on-time architecture with Vin feed forward, ensuring an almost constant operating frequency over load and input voltage variations.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 9V to 42V |
| Output Current | Guaranteed 0.5A |
| Operating Frequency | Up to 800kHz |
| Output Voltage Range | 2.5V to >30V |
| Feedback Accuracy | 2% Accurate 2.5V from -40°C to 125°C |
| Package Types | VSSOP-8, Thermally Enhanced WSON-8 |
| Operating Temperature Range | -40°C to 125°C |
| MOSFET Switch Resistance | 0.74Ω N-Channel MOSFET Switch |
Key Features
- Integrated 0.74Ω N-Channel MOSFET Switch
- Guaranteed 0.5A Output Current
- Ultra-Fast Transient Response
- Up to 800kHz Operation
- No Control Loop Compensation Required
- Vin Feed Forward Provides Constant Operating Frequency
- 2% Accurate 2.5V Feedback from -40°C to 125°C
- Highly Efficient Operation
- Intelligent Current Limit Protection
- External Shutdown Control
- Thermal Shutdown
- VSSOP and Thermally Enhanced WSON Packages
Applications
- 12VDC and 24VDC Distributed Rail Systems
- 24VAC Systems
- Automotive Body Electronics and Telematics
- Industrial Systems
- HB-LED Constant Current Source
Q & A
- What is the input voltage range of the LM25007MMX?
The input voltage range of the LM25007MMX is 9V to 42V.
- What is the maximum output current of the LM25007MMX?
The maximum output current of the LM25007MMX is guaranteed at 0.5A.
- What is the operating frequency range of the LM25007MMX?
The operating frequency of the LM25007MMX can be adjusted up to 800kHz.
- How is the output voltage of the LM25007MMX set?
The output voltage of the LM25007MMX can be programmed by two external resistors, with the regulated voltage calculated as VOUT = 2.5 x (R3 + R4) / R4.
- What are the package options for the LM25007MMX?
The LM25007MMX is available in VSSOP-8 and thermally enhanced WSON-8 packages.
- What is the operating temperature range of the LM25007MMX?
The operating temperature range of the LM25007MMX is -40°C to 125°C.
- Does the LM25007MMX require control loop compensation?
No, the LM25007MMX does not require control loop compensation.
- What protection features does the LM25007MMX have?
The LM25007MMX features intelligent current limit protection, external shutdown control, and thermal shutdown.
- How can the efficiency be improved in light load applications?
In light load applications, efficiency can be improved by connecting the Vcc pin to an external voltage source to eliminate the drop through the internal regulator.
- What are some typical applications of the LM25007MMX?
Typical applications include 12VDC and 24VDC distributed rail systems, 24VAC systems, automotive body electronics and telematics, industrial systems, and HB-LED constant current sources.
