Datasheet Texas Instruments TPS51220ARTVT — 数据表

TPS51220A
www.ti.com SLUS897E – DECEMBER 2008 – REVISED JANUARY 2013 Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
Check for Samples: TPS51220A FEATURES 1 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-Audioв„ў Skip)
Programmable Droop Compensation
Voltage Servo Adjustable Soft Start
200-kHz to 1-MHz Fixed-Frequency PWM
Selectable Current/ D-CAPв„ў Mode
Architecture
180В° Phase Shift Between Channels
Resistor or Inductor DCR Current Sensing
Adaptive Zero Crossing Circuit Powergood Output for Each Channel
OCL/OVP/UVP/UVLO Protections
(OVP Disable Option)
Thermal Shutdown (Non-Latch)
Output Discharge Function (Disable Option)
Integrated Boot Strap MOSFET Switch
QFN-32 (RTV/RSN) Package APPLICATIONS Notebook Computer System and I/O Bus
Point of Load in LCD TV, MFP DESCRIPTION
The TPS51220A 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. …