Maxim's PMIC MAX5995B provides the PD with a detection signature, a classification signature, and an integrated isolation power switch with inrush current start control. The IC supports a multi-event classification method as specified in the IEEE 802.3bt standard and provides a signal to indicate from Type 1 to Type 5 Power Source Equipment (PSE). The PMIC MAX5995B also provides a Good-Power (PG) signal, two-step current limiting and pulldown control, and overheat protection.
The device features an intelligent MPS (Maintain Power Signature) function, a high-low power sleep mode, input undervoltage lockout with wide hysteresis, and a long de-glitch time to compensate for the resistive drop of the twisted-pair cable and to ensure a glitch-free transition during power-on/power-off conditions.
The MAX5995B PMIC is available in a 16-pin, 5 mm × 5 mm TQFN power package with an operating temperature range of -40 to 85 degrees Celsius. This PMIC is ideal for VoIP phones, IP security cameras, wireless access points, small cell and picocell base stations, lighting, and building automation.
