Overview
The LM5007MMX/NOPB, produced by Texas Instruments (formerly National Semiconductor), is a high-voltage, 0.5-A step-down switching converter designed for efficient and robust DC/DC buck regulator applications. This device operates over a wide input voltage range of 9 V to 75 V, making it suitable for various high-voltage systems. The LM5007 integrates an 80-V, 0.7-A N-channel buck switch and an internal high-voltage VCC regulator, ensuring high efficiency and low input quiescent current. It is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages, facilitating simple and compact designs.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 9 | 75 | V | |
| Output Current | 0.5 | A | ||
| Junction Temperature (TJ) | -40 | 125 | °C | |
| Switching Frequency | Varies inversely with VIN | |||
| Package Types | VSSOP-8, WSON-8 | |||
| Package Size (VSSOP) | 3.00 mm × 3.00 mm | |||
| Package Size (WSON) | 4.00 mm × 4.00 mm |
Key Features
- Operating input voltage range of 9 V to 75 V
- Integrated 80-V, 0.7-A N-channel buck switch
- Internal high-voltage VCC regulator
- Adaptive constant on-time (COT) control architecture
- No control loop compensation required
- Ultra-fast transient response
- Precision 2.5-V reference
- Low input quiescent current
- Intelligent current limit protection with forced off-time
- Thermal shutdown protection with automatic recovery
- VCC and gate drive undervoltage lockout (UVLO)
- Maximum duty cycle limiter
- External shutdown control
Applications
- Non-isolated buck regulators
- Secondary high voltage post regulators
- 48-V Telecom systems
- 42-V Automotive power bus systems
- General high-voltage step-down conversions from 12-V, 24-V, and 48-V supply rails
Q & A
- What is the input voltage range of the LM5007MMX/NOPB?
The input voltage range is from 9 V to 75 V.
- What type of control scheme does the LM5007 use?
The LM5007 uses a hysteretic control scheme with adaptive constant on-time (COT) architecture.
- What is the maximum output current of the LM5007MMX/NOPB?
The maximum output current is 0.5 A.
- What protection features are included in the LM5007MMX/NOPB?
The device includes intelligent current limit protection, thermal shutdown with automatic recovery, VCC and gate drive undervoltage lockout, and maximum duty cycle limiter.
- What are the available package types for the LM5007MMX/NOPB?
The device is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages.
- How does the LM5007MMX/NOPB handle overcurrent protection?
The device implements an intelligent current limit with forced off-time that is inversely proportional to VOUT, reducing load current foldback.
- What is the purpose of the internal high-voltage VCC regulator?
The internal high-voltage VCC regulator helps in maintaining the necessary voltage for the device's operation, especially for the gate drive of the buck switch.
- Can the LM5007MMX/NOPB be used in automotive systems?
- How does the LM5007MMX/NOPB manage thermal issues?
The device includes thermal shutdown protection with automatic recovery to manage thermal issues.
- Is external shutdown control available on the LM5007MMX/NOPB?
