[uPI Semiconductor Corp.,]

General Description
The uP6161 integrates a high performance synchronous rectified buck controller and a linear-regulator controller. This part works with a single +12V supply voltage and delivers two high quality output voltages for both processing unit and memory unit. An internal linear regulator provides optimum 9V drive voltage for efficiency and thermal management.
The buck controller features internal MOSFET drivers that supports bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. It incorporates simple, single feedback loop, voltage-control with fast transient response.
The linear controller drives an external N-Channel MOSFET with under voltage protection during both soft start and normal operation.
Other features include adjustable operation frequency, internal soft start, under voltage protection, adjustable over current protection and shutdown function. With the above function, this part provides customers a compact, well protected and cost-effective solution. This part is available in SOP-14 and QFN3x3 -16L packages.

FEATUREs
□ Operate with Single 12V Supply
□ Self-Regulated 9V Drive Voltage
□ Integrated Boot Diode
□ Provide Two Regulated Voltages
   □ One Synchronous-Rectified Buck Controller
   □ One Linear Controller
   □ Both Controllers Drive N-Channel MOSFETs
   □ Smaller Converter Size
□ Excellent Output Voltage Regulation
   □ 1.5% for Buck Controller
   □ 2% for Linear Controller
□ Simple Single-Loop Control Design
   □ Voltage-Mode PWM Control
   □ Fast Transient Response
   □ High-Bandwidth Error Amplifier
□ Lossless, Programmable Overcurrent Protection
   □ Uses Lower MOSFET RDS(ON)
□ Adjustable Frequency from 150kHz to 1MHz
□ Internal Soft Start for Both Outputs
□ Under Voltage Protection for Both Outputs including Soft Start Cycle
□ SOP-14 and QFN3x3-16 packages
□ RoHS Compliant and 100% Lead Free

APPLICATIONs
□ Power Supplies for Microprocessors or Subsystem Power Supplies
□ Cable Modems, Set Top Boxes, and DSL Modems
□ Industrial Power Supplies; General Purpose Supplies
□ 12V Input DC-DC Regulators
□ Low-Voltage Distributed Power Supplies