CS5127

CS5127 CS5127 Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable Description The CS5127 is a fixed frequency dual output nonsynchronous buck controller. It contains circuitry for regulating two separate outputs. Each output channel contains a high gain error amplifier, a comparator and latch, and a totem-pole output driver capable of providing DC current of 100mA and peak current in excess of 0.5A. A common oscillator controls switching for both channels, and a sync lead is provided to allow parallel supply operation or shifting of the switching noise spectrum. An on-chip 5V reference is capable of providing as much as 10mA of current for external circuitry. The CS5127 also contains two undervoltage lockout circuits. The first lockout releases when VIN reaches 8.4V, while the second lockout ensures that VREF is higher than 3.6V. The outputs are held in a low state until both lockouts have released. The controller is configured to utilize the V2ª control method to achieve the fastest possible transient response and best overall regulation. This dual controller is a cost-effective solution for providing VCORE and VIO power solutions in computing applications using a single controller. The CS5127 will operate over an input voltage range of 9.4V to 20V and is available in a 16 lead wide body surface mount package. Features s Nonsynchronous Buck Design s V2ª Control Topology s 100ns Transient Loop Response s Programmable Oscillator Frequency ...