The TPS53126 is a dual, adaptive on-time, D-CAP2™ mode synchronous Buck controller. The TPS53126 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low external component count, and low standby current solution. The main control loop for the TPS53126 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS53126 also has a proprietary 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 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 TPS53126 is available in 4mm × 4mm 24 pin VQFN (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
• Internal 1.2 ms Voltage-Servo Soft Start
• Pre-Biased Soft Start
• Selectable Switching Frequency: 350 kHz / 700 kHz
• Cycle-by-Cycle Over-Current Limiting Control
• 30 mV to 300 mV OCP Threshold Voltage
• Thermally Compensated OCP by 4000 ppm/C° at ITRIP

• 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)
• 700
• Features
• Enable, Pre-Bias Start-Up, Synchronous Rectification
• Regulated outputs (#)
• 2
• Number of phases
• 1
• Rating
• Catalog

TPS53126的完整型号有：TPS53126PW、TPS53126PWR、TPS53126RGER、TPS53126RGET，以下是这些产品的关键参数及官网采购报价：

TPS53126PW，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TPS53126PW的批量USD价格：1.859（1000+）

TPS53126PWR，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TPS53126PWR的批量USD价格：1.859（1000+）

TPS53126RGER，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TPS53126RGER的批量USD价格：1.549（1000+）

TPS53126RGET，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TPS53126RGET的批量USD价格：1.859（1000+）

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