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TPS51222

ACTIVE

3-V to 32-V, synchronous dual-output peak current mode buck controller for notebook power

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Data sheet

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TPS51397A ACTIVE 4.5-V to 24-V input, 10-A, synchronous step-down regulator Upgraded adjustable soft start with a lower IQ and an extended positive operating temperature range in a smaller package.

TPS51222

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 32 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1 Vout (max) (V) 12 Features Enable, Frequency synchronization, Light Load Efficiency, Phase Interleaving, Power good, Synchronous Rectification Iq (typ) (µA) 800 Duty cycle (max) (%) 99 Number of phases 1
Vin (min) (V) 4.5 Vin (max) (V) 32 Iout (max) (A) 20 Operating temperature range (°C) -40 to 85 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 1 Vout (max) (V) 12 Features Enable, Frequency synchronization, Light Load Efficiency, Phase Interleaving, Power good, Synchronous Rectification Iq (typ) (µA) 800 Duty cycle (max) (%) 99 Number of phases 1
WQFN (RTV) 32 25 mm² 5 x 5
  • 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
  • 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

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.

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.
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* Data sheet Fixed-Frequency, 99% Duty Cycle Peak Current-Mode Notebook System Pwr Controller datasheet 07 Jan 2009

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