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Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Power Controller


Package | PIN: RTV | 32
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $5.78
10-24 $5.20
25-99 $4.86
100-249 $4.36
250-499 $4.07
500-749 $3.54
750-999 $3.06
1000+ $3.00


  • Input Voltage Range: 4.5 V to 32 V
  • Output Voltage Range: 1 V to 12 V
  • Selectable Light Load Operation
    (Continuous / Auto Skip / Out-Of-Audio Skip)
  • Programmable Droop Compensation
  • Voltage Servo Adjustable Soft Start
  • 200-kHz to 1-MHz Fixed-Frequency PWM
  • Current Mode Architecture
  • 180° Phase Shift Between Channels
  • Resistor or Inductor DCR Current Sensing
  • Current Monitor Output for Each Channel
  • Adaptive Zero Crossing Circuit
  • Powergood Output for Each Channel
  • OCL/OVP/UVP/UVLO Protections
  • Thermal Shutdown (Non-Latch)
  • Output Discharge Function
  • Integrated Boot Strap MOSFET Switch
  • QFN-32 (RTV) Package

Texas Instruments  TPS51222RTVR

The TPS51222 is a dual synchronous buck regulator controller with two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51222 supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 V, and output voltages from 1 V to 12 V. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The high duty cycle (99%) operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1 MHz by a resistor, and each channel runs 180° out-of-phase. The TPS51222 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51222 is available in the 32-pin 5 × 5 QFN package and is specified from -40°C to 85°C.