APW8743C APW8743CQBI-TRG QFN16 IC Chip

Description

Features:

• The APW8743C integrates two independent buck converter channels in one chip. Each channel is capable of delivering up to 0.5 A output current (peak) under design conditions.

• It supports a wide input voltage range from about 4.5 V to 24 V

• The switching frequency is fixed at 500 kHz for both channels.

• It operates in both PFM (Pulse Frequency Modulation) mode for light loads (to boost efficiency) and PWM mode under heavier loads to maintain regulated performance.

• It includes several protective and control features:
    • Power‑on reset (POR) to prevent startup glitches
    • Soft-start to limit inrush currents during startup
    • Soft‑stop / integrated output discharge to actively discharge output capacitors when shutting down
    • Overcurrent protection (OCP) with latch‑off behavior
    • Overvoltage protection (OVP)
    • Undervoltage protection (UVP) 
    • Overtemperature protection (OTP)

• The device has separate EN (enable) controls and VID (voltage identification) control for each channel (VNN_BYP & V1P05A_BYP).

• It also provides a POK (Power OK) indicator for the combined channels.

• It is designed for systems requiring high efficiency across light and moderate load ranges, especially when dual rails are needed from a common input supply.

Usage context: It’s typically used in laptop / motherboard power design for Intel Tiger Lake generation systems, where it supplies system voltages like VNN and 1.05 V (V1P05A).

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