TPS51222 Datasheet | Texas Instruments

FEATURES - 2 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 pensation - Voltage Servo Adjustable Soft Start - 200-k Hz 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 APPLICATIONS - Notebook puter System and I/O Bus - Point of Load in LCD TV, MFP DESCRIPTION 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 plete 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 k Hz 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. VBAT VREG5 5 V/ 100 m A VO1 5V EN IMON1 VO1 VO1 EN1 PGOOD1 SKIPSEL1 32 31 30 29 28 27 26 25 SW1 VBST1 DRVL1 VREG5 GND DRVL2 VBST SW2 1 DRVH1 DRVH2 24 2...