Overview
The LM25007MM from Texas Instruments is a monolithic step-down switching regulator designed to implement low-cost, efficient power supplies. This device is capable of driving a 0.5A load over a wide input voltage range of 9V to 42V. It is available in compact VSSOP-8 and thermally enhanced WSON-8 packages, making it suitable for a variety of applications where space and efficiency are critical.
The LM25007 features an 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. This architecture is easy to use and tolerant of component selection, making it a versatile choice for various power supply designs.
Key Specifications
| Specification | Value |
|---|---|
| Regulator Function | Buck Controller |
| Minimum Input Voltage | 9 V |
| Maximum Input Voltage | 42 V |
| Maximum Output Current | 500 mA |
| Output Type | Adjustable |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Pin Count | 8 |
| Maximum Switching Frequency | 800 kHz |
| Package Type | VSSOP-8, WSON-8 |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +125 °C |
| Dimensions (VSSOP-8) | 3 mm x 3 mm x 0.86 mm |
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
- Vcc Under-Voltage Lockout and Gate Drive Under-Voltage Lockout
- Max Duty Cycle Limiter
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 LM25007MM?
The input voltage range of the LM25007MM is from 9V to 42V.
- What is the maximum output current of the LM25007MM?
The maximum output current of the LM25007MM is 500 mA.
- What are the available package types for the LM25007MM?
The LM25007MM is available in VSSOP-8 and thermally enhanced WSON-8 packages.
- What is the maximum switching frequency of the LM25007MM?
The maximum switching frequency of the LM25007MM is up to 800 kHz.
- Does the LM25007MM require control loop compensation?
No, the LM25007MM does not require control loop compensation.
- What is the operating temperature range of the LM25007MM?
The operating temperature range of the LM25007MM is from -40°C to +125°C.
- How is the output voltage programmed in the LM25007MM?
The output voltage can be programmed using two external resistors according to the formula: VOUT = 2.5 x (R3 + R4) / R4.
- What type of current limit protection does the LM25007MM have?
The LM25007MM features intelligent current limit protection with a non-resetable current limit off-timer.
- Does the LM25007MM have thermal shutdown protection?
Yes, the LM25007MM includes thermal shutdown protection.
- How can the LM25007MM be shut down externally?
The LM25007MM can be shut down externally by pulling the RON/SD pin below 0.7V.
