MP5490 0-2.5V Fully Integrated Power Management Solution WLCSP-36

MP5490 0-2.5V Fully Integrated Power Management Solution WLCSP-36

The MP5490 is a complete power management solution that is well-suited for the transmitter optical subassembly (TOSA) of optical modules.

Key Specifications

Features

• 4-Channel, Configurable Accurate ID Current Source: o Up to 250mA per Channel o 10-Bit Digital-to-Analog Converter (DAC) for ID Current
• 4-Channel Monitoring Photodetector (MPD) Measurement: o Range from 0mA to 5mA
• 6-Channel General-Purpose Input/Output (GPIO): o Supports Analog-to-Digital Converter (ADC) Input or GPO Output o Selectable Open-Drain or Push-Pull GPO
• High-Accuracy, 12-Bit ADC: o 0V to 2.5V External ADC Input o 4-Channel ID Voltage Measurement o 4-Channel EML Current Measurement
• System: o I2C Control Interface o I2C Hardware Reset via HRESET o Supply and Temperature Fault Alarms o Available in a WLCSP-36 (3mmx4.25mm) Package

Typical Application Circuit

Design Notes

• Rail sequencing order and delay are part of the SoC power-up contract; a wrong order latches the processor even though every rail is in spec.
• In multiphase designs, current balance depends on the loop matching between phases, so keep the layout symmetric.
• Digital interfaces (PMBus, I²C) need pull-ups to the correct rail and a defined state during power-up.
• Thermal design is a system problem here: the PMIC sits next to the load it feeds, so budget the shared copper, not the package alone.

Common Questions