LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator
This document describes the LM3477/A high‑side N‑channel MOSFET switching regulator controller. It includes a general description, pin functions, electrical characteristics, and typical application circuits for buck, inverting and zeta regulator topologies. Package information, ordering details, and absolute maximum ratings are also listed.
Typical performance graphs show efficiency, load regulation, and switching frequency behavior over temperature and load. The datasheet also contains safety notices such as life‑support device restrictions and banned‑substance compliance information.
| Switching Frequency | 500 kHz (min 435 kHz, max 575 kHz) |
|---|---|
| Input Voltage Range | 2.97 V to 36 V |
| Current Limit Voltage at 100% (LM3477) | 74 mV |
| Thermal Shutdown Temperature | 165 °C |
| Package | 8‑lead Mini‑SO8 (MSOP‑8) |
| Quiescent Current in Shutdown | 5 pA (Viy = 5 V) |
The shutdown (quiescent) current is specified as 5 pA when Viy = 5 V.
The device’s thermal shutdown temperature is set at 165 °C.
The LM3477 operates with an input voltage between 2.97 V and 36 V.