The TPS6420x are nonsynchronous step-down controllers that are ideally suited for systems powered from a 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllers drive an external P-channel MOSFET allowing design flexibility. To achieve highest efficiency over a wide load current range, this controller uses a minimum on time, minimum off time control scheme and consumes only 20-µA quiescent current. The minimum on time of typically 600 ns (TPS64203) allows the use of small inductors and capacitors. When disabled, the current consumption is reduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of –40°C to 85°C.

• Step-Down Controller for Applications With up to 95% Efficiency
• 1.8-V to 6.5-V Operating Input Voltage Range
• Adjustable Output Voltage Range From 1.2 V to VI
• High Efficiency Over a Wide Load Current Range
• 100% Maximum Duty Cycle for Lowest Dropout
• Internal Softstart
• 20-A Quiescent Current (Typical)
• Overcurrent Protected
• Available in a SOT23 Package
• APPLICATIONS
  • USB Powered Peripherals
  • Organizers, PDAs, and Handheld PCs
  • Low Power DSP Supply
  • Digital Cameras
  • Hard Disk Drives
  • Portable Audio Players

• Vin (Min) (V)
• 1.8
• Vin (Max) (V)
• 6.5
• Vout (Min) (V)
• 1.2
• Vout (Max) (V)
• 6.5
• Iout (Max) (A)
• 3
• Iq (Typ) (uA)
• 20
• Switching frequency (Min) (kHz)
• 800
• Switching frequency (Max) (kHz)
• 800
• Features
• Enable
• Regulated outputs (#)
• 1
• Number of phases
• 1
• Rating
• Catalog

TPS64203的完整型号有：TPS64203DBVR、TPS64203DBVT，以下是这些产品的关键参数及官网采购报价：

TPS64203DBVR，工作温度：-40 to 85，封装：SOT-23 (DBV)-6，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TPS64203DBVR的批量USD价格：0.484（1000+）

TPS64203DBVT，工作温度：-40 to 85，封装：SOT-23 (DBV)-6，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TPS64203DBVT的批量USD价格：0.581（1000+）

TPS64202EVM-023 TPS64202 评估模块 (3.3V @ 2A)

The TPS64202EVM-023 is an evaluation tool for the TPS64202 inductive step-down controller in SOT-23 package which can supply voltages down to 1.2V from a 1.8-V to 6.5-V input. The TPS64202EVM-023 uses a TPS64202 adjustable output step-down controller and the appropriate external components to (...)

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