The TPS54326 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54326 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54326 uses the D-CAP2™ mode control which provides a fast transient response with no external components. The adoptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency Eco-mode operation at light load for high efficiency.

The TPS54326 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 operates from 4.5-V to 18-V V_CC input , and from 2-V to 18-V VIN input power supply voltage. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start time and a power good function. The TPS54326 is available in the 14 pin HTSSOP or 16 pin QFN package, and designed to operate from –40°C to 85°C.

• D-CAP2 Mode Enables Fast Transient Response
• Low Output Ripple and Allows Ceramic Output Capacitor
• Wide VCC Input Voltage Range: 4.5 V to 18 V
• Wide VIN Input Voltage Range: 2 V to 18 V
• Output Voltage Range: 0.76 V to 5.5 V
• Highly Efficient Integrated FET’s Optimized for Lower Duty Cycle Applications - 120 mΩ (High Side) and 70 mΩ (Low Side)
• High Efficiency, less than 10 μA at Shutdown
• Auto-Skip Eco-mode? for High Efficiency at Light Load
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 700-kHz Switching Frequency (fSW)
• Cycle-By-Cycle Overcurrent Limit
• Power Good Output
• APPLICATIONS
  • Wide Range of Applications for Low Voltage System
    • Digital TV Power Supply
    • High Definition Blu-ray Disc Players
    • Networking Home Terminal
    • Digital Set Top Box (STB)

D-CAP2 Is a trademark of Texas InstrumentsPower PAD Is a trademark of Texas InstrumentsPower

• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 18
• Vout (Min) (V)
• 0.76
• Vout (Max) (V)
• 5.5
• Iout (Max) (A)
• 3
• Iq (Typ) (uA)
• 850
• Switching frequency (Min) (kHz)
• 700
• Switching frequency (Max) (kHz)
• 700
• Features
• Enable, Light Load Efficiency, Power Good, Synchronous Rectification, Soft Start Adjustable
• Rating
• Catalog
• Regulated outputs (#)
• 1
• Control mode
• D-CAP2
• Duty cycle (Max) (%)
• 90

TPS54326的完整型号有：TPS54326PWP、TPS54326PWPR、TPS54326RGTR、TPS54326RGTT，以下是这些产品的关键参数及官网采购报价：

TPS54326PWP，工作温度：-40 to 85，封装：HTSSOP (PWP)-14，包装数量MPQ：90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TPS54326PWP的批量USD价格：0.832（1000+）

TPS54326PWPR，工作温度：-40 to 85，封装：HTSSOP (PWP)-14，包装数量MPQ：2000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TPS54326PWPR的批量USD价格：0.697（1000+）

TPS54326RGTR，工作温度：-40 to 85，封装：VQFN (RGT)-16，包装数量MPQ：3000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TPS54326RGTR的批量USD价格：0.697（1000+）

TPS54326RGTT，工作温度：-40 to 85，封装：VQFN (RGT)-16，包装数量MPQ：250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TPS54326RGTT的批量USD价格：0.832（1000+）

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