Datasheet Texas Instruments TPS51220RHBR — 数据表

TPS51220
www.ti.com SLVS785C – OCTOBER 2007 – REVISED JULY 2009 Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
Check for Samples: TPS51220 FEATURES 1 2 Input Voltage Range: 4.5 V to 28 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 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 (RHB) APPLICATIONS Notebook Computer System and I/O Bus
Point of Load in LCD TV, MFP DESCRIPTION
The TPS51220 is a dual synchronous buck regulator controller with 2 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
TPS51220 supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply …