ZL8800 Series Digital Controller

Renesas' ZL8800 is a dual-output or dual-phase digital DC/DC controller. Each output can operate independently, or can be used together in a dual-phase configuration for high-current applications. The ZL8800 supports a wide range of output voltages (0.54 V to 5.5 V) operating from input voltages as low as 4.5 V up to 14 V. With the fully-digital ChargeMode control, the ZL8800 will respond to a transient load step within a single-switching cycle. This unique compensation-free modulation technique allows designs to meet transient specifications with minimum-output capacitance, saving cost and board space. Renesas' proprietary single-wire digital-DC (DDC) serial-bus enables the ZL8800 to communicate between other Zilker ICs. By using the DDC, the ZL8800 achieves complex functions such as inter-IC phase current balancing, sequencing, and fault spreading, eliminating complicated power-supply managers with numerous external discrete components.