The APW7098, two-phase PWM control IC, provides a precision voltage regulation system for advanced graphic microprocessors in graphics card applications. The integration of power MOSFET drivers into the controller IC and reduces the number of external parts for a cost and space saving power management solution. The APW7098 uses a voltage-mode PWM architecture, operating with fixed-frequency, to provides excellent load transient response. The device uses the voltage across the DCRs of the inductors for current sensing. Load line voltage positioning (DROOP), channel-current balance, and over-current protection are accomplished through continuous inductor DCR current sensing. The MODE pin programs single- or two- phase operation. When IC operates in two-phase mode normally, it can transfer two-phase mode to single-phase mode at liberty. Nevertheless, once operates in single-phase mode, the operation mode is latched. It is required to toggle SS, REFIN/EN or 5VCC pin to reset the IC. Such feature of the MODE pin makes the APW7098 ideally suitable for dual power input applications, such as PCIE interfaced graphic cards.