The TPS53129 is a dual, adaptive on-time D-CAP2™ mode synchronous buck controller. The TPS53129 enables system designers to complete the suite of various end equipment’s power bus regulators with cost effective, low component count, and low standby current solution. The main control loop for the TPS53129 uses the D-CAP2™ mode control which provides a very fast transient response with no external components.

The TPS53129 also has a circuit that enables the device to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. 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 device provides convenient and efficient operation with input voltages from 4.5 V to 24 V and output voltages from 0.76 V to 5.5 V.

The TPS53129 is available in 4-mm × 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
• 700-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)
• 700
• Switching frequency (Max) (kHz)
• 700
• Features
• Enable, Light Load Efficiency, Pre-Bias Start-Up, Synchronous Rectification
• Regulated outputs (#)
• 2
• Number of phases
• 1
• Rating
• Catalog

TPS53129的完整型号有：TPS53129PW、TPS53129PWR、TPS53129RGER、TPS53129RGET，以下是这些产品的关键参数及官网采购报价：

TPS53129PW，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TPS53129PW的批量USD价格：2.304（1000+）

TPS53129PWR，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TPS53129PWR的批量USD价格：1.646（1000+）

TPS53129RGER，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TPS53129RGER的批量USD价格：1.975（1000+）

TPS53129RGET，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TPS53129RGET的批量USD价格：2.304（1000+）

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