The TPS53128 is a dual, adaptive on-time D-CAP2 mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment's power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53128 uses the D-CAP2 Mode topology which provides a very fast transient response with no external component.

The TPS53128 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. 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 part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V.

The TPS53128 is available in 4-mm x 4-mm 24 pin QFN (RGE) or 24 pin TSSOP (PW) packages, and is specified from –40°C to 85°C ambient temperature range.

• D-CAP2 Mode Control
  • Fast Transient Response
  • No External Parts Required for Loop Compensation
  • Compatible With Ceramic Output Capacitors
• High Initial Reference Accuracy (±1%)
• Low Output Ripple
• Wide Input Voltage Range: 4.5 V to 24 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
• Adjustable Soft Start
• Non-Sinking Pre-Biased Soft Start
• 350-kHz Switching Frequency
• Cycle-by-Cycle Over-Current Limiting Control
• 30-mV to 300-mV OCP Threshold Voltage
• Thermally Compensated OCP by 4000 ppm/°C at ITRIP
• Auto-Skip Eco-mode for High Efficiency at Light Load
• APPLICATIONS
  • Point-of-Load Regulation in Low Power Systems for Wide Range of Applications
    • Digital TV Power Supply
    • Networking Home Terminal
    • Digital Set-Top Box (STB)
    • DVD Player/Recorder
    • Gaming Consoles

• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 24
• Vout (Min) (V)
• 0.76
• Vout (Max) (V)
• 5.5
• Iout (Max) (A)
• 15
• Iq (Typ) (uA)
• 450
• Switching frequency (Min) (kHz)
• 350
• Switching frequency (Max) (kHz)
• 350
• Features
• Enable, Light Load Efficiency, Pre-Bias Start-Up, Synchronous Rectification
• Regulated outputs (#)
• 2
• Number of phases
• 1
• Rating
• Catalog

TPS53128的完整型号有：TPS53128PW、TPS53128PWR、TPS53128RGER、TPS53128RGET，以下是这些产品的关键参数及官网采购报价：

TPS53128PW，工作温度：-40 to 85，封装：TSSOP (PW)-24，包装数量MPQ：60个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS53128PW的批量USD价格：2.304（1000+）

TPS53128PWR，工作温度：-40 to 85，封装：TSSOP (PW)-24，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS53128PWR的批量USD价格：1.975（1000+）

TPS53128RGER，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：NIPDAU，TI官网TPS53128RGER的批量USD价格：1.975（1000+）

TPS53128RGET，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TPS53128RGET的批量USD价格：2.304（1000+）

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