illustrate

The TPS51221 is a two-channel synchronous buck regulator, 2 LDO. This technology optimizes the 5-V/3.3-V system controller to cost-effectively power 2 to 4 laptops. TPS51221 supports high efficiency, fast transient response and 99% duty cycle operation. It supports an input voltage range from 4.5 V to 28 V from a 1 V supply with an output voltage of 12 V and a peak current mode that supports stable operation with low ESR capacitance and output accuracy. High tariff (99%) operation and a wide input/output voltage range support flexible small mobile PC designs and a variety of other applications. The fixed frequency can be 200 kHz to 1MHz of one resistor, and each channel operates at 180°.

characteristic

• Input voltage range: 4.5 V to 28 V
• Output voltage range: 1 V to 12 V
• Selectable light load operation (continuous/automatic skip to/out audio ™ skip)
• Programmable sag compensation
• Voltage servo adjustable soft start
• Fixed-frequency PWM from 200 kHz to 1 MHz
• Current-mode architecture
• 180° phase shift channel
• Resistive or inductive DCR current sensing
• The power output is good per channel
• Octopus Card Company/Overvoltage Protection/UVP/Undervoltage Lockout Protection
• The current monitor output for CH1
• Thermal shutdown (non-latching)
• Output Discharge Function (Disable Option)
• With integrated MOSFET switch start-up
• QFN32 (Radio and Television University)
• apply
  • Laptop systems and I/O buses
  • LCD TV at the point of load, all-in-one machine