Overview
The LM5007MM, produced by Texas Instruments, is a versatile and efficient step-down switching regulator designed for a wide range of high-voltage applications. This device operates from an input voltage range of 9 V to 75 V and is capable of delivering up to 500 mA of DC load current. The LM5007MM features an integrated 80-V, 0.7-A N-channel buck switch, making it ideal for step-down conversions from unregulated, semi-regulated, and fully-regulated supply rails such as 12 V, 24 V, and 48 V. The regulator is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages, ensuring a compact and thermally efficient solution.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 9 | 75 | V | |
| Output Current | 500 | mA | ||
| Buck Switch Voltage Rating | 80 | V | ||
| Buck Switch Current Rating | 0.7 | A | ||
| Operating Junction Temperature | -40 | 125 | °C | |
| Minimum Off-Time | 300 | ns | ||
| Reference Voltage | 2.5 | V | ||
| Package Types | VSSOP-8, WSON-8 |
Key Features
- Adaptive Constant On-Time Control Architecture: The on-time varies inversely with the input voltage, allowing for a nearly constant switching frequency across varying load and input conditions.
- High Efficiency Operation: The device is designed to provide high efficiency with low input quiescent current.
- No Control Loop Compensation Required: The hysteretic control scheme eliminates the need for control loop compensation, simplifying the design and reducing external component count.
- Ultra-Fast Transient Response: The regulator provides very fast load transient response due to its hysteretic control scheme.
- Intelligent Current Limit Protection: Features an intelligent current limit scheme with forced off-time that is inversely proportional to VOUT, reducing load current foldback and ensuring short-circuit protection.
- Thermal Shutdown Protection with Hysteresis: Includes thermal shutdown with automatic recovery to prevent overheating.
- VCC and Gate Drive Undervoltage Lockout (UVLO): Protects against undervoltage conditions on the VCC and gate drive.
- Maximum Duty Cycle Limiter: Ensures the duty cycle does not exceed a safe limit.
- External Shutdown Control: Allows for external shutdown control for system management.
Applications
- 48-V Telecom Systems: Well-suited for regulating step-down higher voltage inputs in telecom applications.
- 42V Automotive Power Bus Systems: Ideal for the new 42V automotive power bus ranges.
- Secondary High Voltage Post Regulators: Can be used as a secondary regulator for high-voltage applications.
- Non-Isolated Buck Regulators: Suitable for various non-isolated buck regulator applications.
Q & A
- What is the input voltage range of the LM5007MM?
The input voltage range of the LM5007MM is from 9 V to 75 V.
- What is the maximum output current of the LM5007MM?
The maximum output current of the LM5007MM is 500 mA.
- What type of control scheme does the LM5007MM use?
The LM5007MM uses a hysteretic control scheme with adaptive constant on-time control architecture.
- Does the LM5007MM require control loop compensation?
No, the LM5007MM does not require control loop compensation due to its hysteretic control scheme.
- What are the package options for the LM5007MM?
The LM5007MM is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages.
- What protection features does the LM5007MM include?
The LM5007MM includes intelligent current limit protection, thermal shutdown with automatic recovery, VCC and gate drive undervoltage lockout, and a maximum duty cycle limiter.
- What is the reference voltage used by the LM5007MM?
The LM5007MM uses an internal reference voltage of 2.5 V.
- Can the LM5007MM be used in automotive applications?
Yes, the LM5007MM is well-suited for the new 42V automotive power bus ranges.
- What is the operating junction temperature range of the LM5007MM?
The operating junction temperature range of the LM5007MM is from -40°C to 125°C.
- Does the LM5007MM support external shutdown control?
Yes, the LM5007MM supports external shutdown control for system management.
