ISL88550A Datasheet (Renesas) - Synchronous Step-Down Controller

ISL88550A, Synchronous Step-Down Controller

DATASHEET ISL88550A Synchronous Step-Down Controller with Sourcing and Sinking LDO Regulator FN6168 Rev 3.00 April 23, 2008 ISL88550A integrates a synchronous buck PWM controller to generate VDDQ, a sourcing and sinking LDO linear regulator to generate VTT, and a 10mA reference output buffer to generate VTTR.

The buck controller drives two external N-Channel MOSFETs to generate output voltages down to 0.7V from a 2V to 25V input with output currents up to 15A.

The LDO can source up to 2.5A an

ISL88550A Features

* make the ISL88550A ideally suited for DDR memory applications in desktops, notebooks and graphics cards. The PWM controller in the ISL88550A uses constant-on-time PWM architecture with a programmable switching frequency of up to 600kHz. This control scheme handles wide input/output voltage ratios wi