The TPS51124 is a dual, adaptive on-time D-CAP™ mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milliampere range. The main control loop for the TPS51124 uses the D-CAP mode that optimized for low ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power good signals for each channel allow flexibility of power sequencing. The part provides a convenient and efficient operation with supply input voltages (V5IN, V5FILT) ranging from 4.5 V to 5.5 V, conversion voltages (drain voltage for the synchronous high-side MOSFET) from 3 V to 28 V and output voltages from 0.76 V to 5.5 V.

The TPS51124 is available in 24-pin VQFN package specified from –40°C to 85°C ambient temperature range.

• High Efficiency, Low-Power Consumption, Shutdowns to <1 μA
• Fixed Frequency Emulated On-Time Control, Frequency Selectable From Three Options
• D-CAP Mode Enables Fast Transient Response
• Auto-Skip Mode
• Less Than 1% Initial Reference Accuracy
• Low Output Ripple
• Wide Input Voltage Range: 3 V to 28 V
• Output Voltage Range: 0.76 V to 5.5 V
• Low-Side RDS(ON) Loss-less Current Sensing
• Adaptive Gate Drivers With Integrated Boost Diode
• Internal 1.2-ms Voltage-Servo Soft-Start
• Powergood Signals for Each Channel With Delay Timer
• Output Discharge During Disable, Fault
• APPLICATIONS
  • Notebook I/O and Low-Voltage System Bus

All other trademarks are the property of their respective owners

• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 28
• Vout (Min) (V)
• 0.76
• Vout (Max) (V)
• 5.5
• Iout (Max) (A)
• 15
• Iq (Typ) (uA)
• 350
• Switching frequency (Min) (kHz)
• 240
• Switching frequency (Max) (kHz)
• 420
• Features
• Enable, Light Load Efficiency, Power Good, Synchronous Rectification
• Regulated outputs (#)
• 2
• Number of phases
• 1
• Rating
• Catalog

TPS51124的完整型号有：TPS51124RGER、TPS51124RGET，以下是这些产品的关键参数及官网采购报价：

TPS51124RGER，工作温度：-40 to 85，封装：VQFN (RGE)-24，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：Call TI，TI官网TPS51124RGER的批量USD价格：1.881（1000+）

TPS51124RGET，工作温度：-40 to 85，封装：VQFN (RGE)-24，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：NIPDAU，TI官网TPS51124RGET的批量USD价格：2.239（1000+）

TPS51124 PSpice Model (Rev. B)

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)