The MP5490 is a complete power management solution, and it is well-suited for the transmitter optical subassembly (TOSA) of quad small form factor pluggable (QSFP) optical modules. The MP5490 integrates four high-accuracy current source (ID) (IDAC) for distributed feedback (DFB) laser diodes (LDs), as well as four negative voltage biases for the EML bias. To simplify the design, the MP5490 also provides four channels with EML current measurements and MPD current measurements.
The device integrates six channels with high-accuracy, low-temperature coefficients, and external analog-to-digital (ADC) inputs. These ADCs can read the ROSA current and temperature information, which saves MCU resources.
All of the output rails can be adjusted via the I2C bus, or they can be preset via the multiple one-time programmable (MOTP) memory.
The MP5490 requires a minimal number of external components, and is available in a space-saving WLCSP-36BT-substrate BGA-36 (3mmx4.25mm) package.
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