uP6111B

uP6111A/B Single Phase PWM Controller for Mobile Applications General Description The uP6111A/B is a high performance synchronous-rectified buck controller specifically designed for POL voltage regulation in notebook PC application. The controller operates with 5V bias voltage and converts 2V~26V input voltage to 0.75V~5.5V output voltage. The uP6111A/B adopts constant-on-time PWM scheme that features easy-to-use, low external component count, fast transient response and quasi constant frequency operation over the operation range. Selectable Forced Continuous Conduction Mode (FCCM) or Power Saving Mode (PSM) enables the flexibility for low noise operation or high efficiency conversion over wide output current range. Lossless current sensing by RDS(ON) of lower switch achieves programmable over current protection. Other features include internal soft start, integrated bootstrap diode and thermal shutdown. The uP6111A is available in WQFN3x3 -16L and WQFN4x4-16L packages. The uP6111B is available in VQFN3.5x3.5- 14L and TSSOP14L packages. Wide Input Voltage Range 2V ~ 26V Wide Output Voltage Range 0.75V ~ 5.5V 1.0% Initial Accuracy Constant On Time PWM Quasi Constant Switching Frequency Adjustable Frequency from 200kHz to 500kHz Ultra Fast Transient Response Integrated Bootstrap Diode Integrated MOSFET Drivers with Shoot-Through Protection Configurable Forced Continuous Current Mode or Power Saving Mode Lossless, Programmable Overcurrent Protection Use Low-Side MOSFET RDS(ON) I...