SLVSIY7 August 2025 LM5168E
PRODUCTION DATA
The LM5168E contains an internal linear regulator that is powered from VIN with a nominal output of 5V, eliminating the need for an external capacitor to stabilize the VCC subregulator. The VCC subregulator supplies current to internal circuit blocks, including the synchronous FET driver and logic circuits. The input pin (VIN) can be connected directly to line voltages up to 115V. Because the power MOSFET has a low total gate charge, use a low bootstrap capacitor value to reduce the stress on the internal regulator. Select a high-quality 2.2nF X7R ceramic bootstrap capacitor as specified in the Absolute Maximum Ratings. Selecting a higher value capacitance stresses the internal VCC regulator and can damage the device. An internal bootstrap diode connects from VCC to BST to replenish the charge in the high-side gate drive bootstrap capacitor when the switch-node voltage is low.