The LM5007 is a high-voltage step-down switching regulator from Linear Technology. It integrates an 80V, 0.7A N-channel buck switch, has a simple external circuit, the working frequency can be automatically adjusted according to the input voltage and load, and the output voltage is adjustable. It has thermal shutdown, undervoltage lockout, overcurrent protection, overload protection and other functions.
The LM5007 is a high‑voltage step‑down switching regulator that integrates an 80 V, 0.7 A N‑Channel buck switch in MSOP‑8 or LLP‑8 packages. It uses a hysteretic control scheme with on‑time inversely proportional to the input voltage, providing a nearly constant switching frequency and ultra‑fast transient response without external loop compensation.
The document includes a general description, pin definitions, absolute maximum and electrical characteristics, typical application circuits, and detailed operating guidance such as over‑voltage protection, current limiting, shutdown operation, and thermal shutdown behavior. Physical dimensions and ordering information for the MSOP‑8 and LLP‑8 packages are also provided.
| Integrated Buck Switch | 80 V, 0.7 A N‑Channel |
|---|---|
| Input Voltage Range | 9 V to 75 V |
| Thermal Shutdown Temperature | 165 °C |
| Current Limit Threshold | 535‑900 mA |
| Switching Frequency Behavior | Nearly constant with line voltage variation |
The LM5007 operates with an input voltage from 9 V up to 75 V.
Thermal shutdown is activated at 165 °C.
The device includes thermal shutdown, Vcc undervoltage lockout, gate‑drive undervoltage lockout, and a maximum duty‑cycle limiter.