illustrate

The TPS51221 is a dual synchronous buck regulator controller with 2 LDO. This technology optimizes the 5-V/3.3-V system controller, cost-effectively powering 2- to 4-cell notebook computers. The TPS51221 supports high efficiency, fast transient response and 99% duty cycle operation. It supports input voltages from a 1 V supply ranging from 4.5 V to 28 V, an output voltage of 12 five, peak current mode supports stable operation with ESR capacitance and low output accuracy. High tariff (99%) operation and wide input/output voltage range support flexible small form factor mobile computer designs and a variety of other applications. Fixed frequencies can be from 200 kHz to 1 MHz with a single resistor with a phase of 180° operation per channel.

characteristic

• Input voltage range: 4.5 V to 28 V
• Output voltage range: 1 V to 12 V
• Selectable light load operation (continuous/auto-skipping to/out audio ™ skipping)
• 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
• Power good outputs per channel
• Octopus card company/overvoltage protection/UVP/undervoltage lockout protection
• is the current monitor output for CH1
• Thermal shutdown (non-latching)
• Output discharge function (disable option)
• Start-up with integrated MOSFET switch
• QFN32 (University of Radio and Television)
• apply
  • Laptop system and I/O bus
  • LCD TV at the point of load, MFP