TPS61221集成电路（IC）的DCDC开关稳压器规格书PDF中文资料

TPS61221属于集成电路（IC）的DCDC开关稳压器。由德州仪器制造生产的TPS61221稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

1 Features

1• Up to 95% Efficiency at Typical Operating

Conditions

• 5.5 μA Quiescent Current

• Startup Into Load at 0.7 V Input Voltage

• Operating Input Voltage from 0.7 V to 5.5 V

• Pass-Through Function during Shutdown

• Minimum Switching Current 200 mA

• Protections:

– Output Overvoltage

– Overtemperature

– Input Undervoltage Lockout

• Adjustable Output Voltage from 1.8 V to 6 V

• Fixed Output Voltage Versions

• Small 6-pin SC-70 Package

2 Applications

• Battery Powered Applications

– 1 to 3 Cell Alkaline, NiCd or NiMH

– 1 cell Li-Ion or Li-Primary

• Solar or Fuel Cell Powered Applications

• Consumer and Portable Medical Products

• Personal Care Products

• White or Status LEDs

• Smartphones

3 Description

The TPS6122x family devices provide a power-supply

solution for products powered by either a single-cell,

two-cell, or three-cell alkaline, NiCd or NiMH, or one-

cell Li-Ion or Li-polymer battery. Possible output

currents depend on the input-to-output voltage ratio.

The boost converter is based on a hysteretic

controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent

currents. The output voltage of the adjustable version

can be programmed by an external resistor divider, or

is set internally to a fixed output voltage. The converter can be switched off by a featured enable

pin. While being switched off, battery drain is

minimized. The device is offered in a 6-pin SC-70

package (DCK) measuring 2 mm x 2 mm to enable

small circuit layout size.