Overview
The LM5007SDX/NOPB from Texas Instruments is a high-voltage, step-down switching regulator designed for efficient and reliable DC/DC buck conversions. This device operates over an input voltage range of 9 V to 75 V and is capable of delivering up to 0.5 A of output current. The LM5007 features an integrated 80-V, 0.7-A N-channel buck switch and an internal high-voltage VCC regulator, making it suitable for a wide range of applications, including 48-V automotive and telecom systems. The regulator uses a hysteretic control scheme with constant on-time (COT) architecture, which ensures fast transient response without the need for control loop compensation. It is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages, facilitating simple and optimized PCB layout.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 9 | 75 | V | |
| Junction Temperature (TJ) | -40 | 125 | °C | |
| Output Current | 0.5 | A | ||
| Buck Switch Voltage Rating | 80 | V | ||
| Buck Switch Current Rating | 0.7 | A | ||
| Reference Voltage | 2.5 | V | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | 158.3 (VSSOP), 38.1 (WSON) | °C/W |
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
- Adjustable output voltage
- Adaptive constant on-time control architecture for fast transient response without control loop compensation
- Precision 2.5-V reference voltage
- Low input quiescent current
- Intelligent current limit protection with forced off-time
- VCC and gate drive undervoltage lockout protection
- Thermal shutdown protection with automatic recovery
- External shutdown control
- Available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages
Applications
- Non-isolated DC/DC buck regulators
- Secondary high-voltage post regulators
- 48-V automotive systems
- 48-V telecom power bus designs
- 42-V automotive systems
Q & A
- What is the input voltage range of the LM5007?
The input voltage range of the LM5007 is from 9 V to 75 V.
- What is the maximum output current of the LM5007?
The LM5007 can deliver up to 0.5 A of output current.
- What type of control scheme does the LM5007 use?
The LM5007 uses a hysteretic control scheme with constant on-time (COT) architecture.
- Does the LM5007 require control loop compensation?
No, the LM5007 does not require control loop compensation due to its hysteretic control scheme.
- What are the package options for the LM5007?
The LM5007 is available in 8-pin VSSOP and thermally enhanced 8-pin WSON packages.
- What protection features does the LM5007 include?
The LM5007 includes intelligent current limit protection, VCC and gate drive undervoltage lockout, thermal shutdown with automatic recovery, and maximum duty cycle limiter.
- How does the LM5007 handle overcurrent conditions?
The LM5007 has an intelligent current limit off-timer that reduces load current foldback and provides cycle-by-cycle current limit protection.
- Can the LM5007 be shut down externally?
- What is the reference voltage of the LM5007?
The reference voltage of the LM5007 is 2.5 V.
- How does the LM5007 manage thermal issues?
The LM5007 includes thermal shutdown protection with automatic recovery to manage thermal issues.
