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 input voltage ranging from 4.5 V to 28 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (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 TPS51220 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220 is available in the 32 pin 5x5 QFN package and is specified from -40°C to 85°C.

• 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-Audio Skip)
• Programmable Droop Compensation
• Voltage Servo Adjustable Soft Start
• 200 kHz to 1 MHz Fixed Frequency PWM
• Selectable Current/D-CAP Mode Architecture
• 180° 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

• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 28
• Vout (Min) (V)
• 1
• Vout (Max) (V)
• 12
• Iout (Max) (A)
• 20
• Iq (Typ) (uA)
• 1300
• Switching frequency (Min) (kHz)
• 200
• Switching frequency (Max) (kHz)
• 1000
• Features
• Enable, Frequency Synchronization, Light Load Efficiency, Phase Interleaving, Power Good, Synchronous Rectification
• Regulated outputs (#)
• 2
• Number of phases
• 1
• Rating
• Catalog

TPS51220的完整型号有：TPS51220RHBR、TPS51220RHBT，以下是这些产品的关键参数及官网采购报价：

TPS51220RHBR，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAUAG，TI官网TPS51220RHBR的批量USD价格：1.32（1000+）

TPS51220RHBT，工作温度：-40 to 85，封装：VQFN (RHB)-32，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAUAG，TI官网TPS51220RHBT的批量USD价格：1.584（1000+）

TPS51220EVM — 使用 TPS51220 评估模块的 TPS51220EVM 高性能同步降压

TPS51220 是一款具有三个低压降 (LDO) 稳压器的双峰值电流模式、同步降压控制器。它针对 5V/3.3V 笔记本系统电源进行了优化。99% 的工作占空比使设计者能够经济高效地完成 2 节到 4 节的锂离子电池应用。TPS51220 支持高效、快速瞬态响应和 99% 的工作占空比。DCR 电流感应提供了无损电流感应和自由的 MOSFET 选择；电阻感应支持精确的电流感应操作。它支持 4.5V 到 30V 的电源输入电压和 1V 到 12V 的输出电压。大电流、5V @ 100A、3.3V @ 10A、板载线性稳压器具有与 SMPS 的无假信号切换功能，并且 2V 基准具有 100mA (...)

TPS51220(A) Unencrypted PSpice Average Model Package (Rev. A)

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