Overview
The LM5007MMX from Texas Instruments is a high-efficiency, 0.5-A step-down switching converter designed to implement low-cost and efficient buck regulators. This device operates over an input voltage range of 9 V to 75 V and is suitable for step-down conversions from 12-V, 24-V, and 48-V supply rails. The LM5007MMX features an integrated 80-V, 0.7-A N-channel buck switch, making it ideal for applications requiring high voltage and current handling. The converter uses a hysteretic control scheme with a constant on-time (COT) operation, which eliminates the need for control loop compensation and provides fast transient response. It is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages, facilitating simple and optimized PCB layout.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 9 V to 75 V | V |
| Output Voltage Range | 2.5 V to 73 V | V |
| Output Current | Up to 500 mA | A |
| Integrated Buck Switch | 80 V, 0.7 A N-channel | V, A |
| Package Types | VSSOP-8, WSON-8 | - |
| Package Size (VSSOP) | 3.00 mm × 3.00 mm | mm |
| Package Size (WSON) | 4.00 mm × 4.00 mm | mm |
| Control Scheme | Hysteretic Control with Constant On-Time (COT) | - |
Key Features
- Integrated 80-V, 0.7-A N-channel Buck Switch: Enables high voltage and current handling.
- Hysteretic Control Scheme: Uses a constant on-time (COT) operation, eliminating the need for control loop compensation and providing fast transient response.
- Ultra-Fast Transient Response: No control loop compensation required.
- Precision 2.5-V Reference: Ensures accurate output voltage regulation.
- Low Input Quiescent Current: Minimizes power consumption during standby.
- Comprehensive Protection Features: Includes intelligent current limit protection, VCC and gate drive undervoltage lockout (UVLO), thermal shutdown with automatic recovery, and maximum duty cycle limiter.
- External Shutdown Control: Allows for external control of the converter.
- Small Solution Size: Available in VSSOP-8 and thermally enhanced WSON-8 packages.
Applications
- 48-V Telecom Systems: Suitable for high-voltage power bus designs in telecom applications.
- 48-V Automotive Systems: Ideal for automotive power bus designs requiring high voltage and efficiency.
- Secondary High-Voltage Post Regulator: Can be used as a post-regulator in high-voltage systems.
- Non-Isolated DC/DC Buck Regulator: General-purpose step-down conversion for various supply rails.
Q & A
- What is the input voltage range of the LM5007MMX?
The input voltage range is from 9 V to 75 V.
- What is the maximum output current of the LM5007MMX?
The maximum output current is up to 500 mA.
- What type of control scheme does the LM5007MMX use?
The LM5007MMX uses a hysteretic control scheme with a constant on-time (COT) operation.
- Does the LM5007MMX require control loop compensation?
No, the LM5007MMX does not require control loop compensation due to its hysteretic control scheme.
- What are the package options for the LM5007MMX?
The LM5007MMX is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages.
- What protection features are included in the LM5007MMX?
The device includes intelligent current limit protection, VCC and gate drive undervoltage lockout (UVLO), thermal shutdown with automatic recovery, and maximum duty cycle limiter.
- Can the LM5007MMX be used in automotive systems?
- What is the typical application of the LM5007MMX in telecom systems?
The LM5007MMX is used in high-voltage power bus designs in telecom applications.
- How does the LM5007MMX handle thermal issues?
The device features thermal shutdown with automatic recovery to handle thermal issues.
- Can the LM5007MMX be externally shut down?
