深圳市中立信电子科技有限公司

1特征3描述

TPS6220x设备是一个高效1•高效同步降压系列

同步降压变换器适合于由1单元锂离子或3单元供电的95%效率便携式系统的变换器

•2.5- 6 v输入电压范围镍氢/镍镉电池。这些设备也适用于

•从0.7 V到VI的可调输出电压范围从标准的3.3 V或5 V电压轨运行。

•固定输出电压选项，输出电压范围为6v至0.7 V

•输出电流为300毫安，输出电流为300毫安

适用于低压dsp和处理器•1-MHz固定频率PWM操作

用于pda、掌上电脑和智能手机。下

•在宽负载电流范围内的效率额定负载电流，设备以固定的方式运行

由于省电模式，开关频率通常为1兆赫。在轻负荷

•15-μA典型的静态电流电流,一部分进入省电模式

•软启动操作;降低了开关频率

静态电流通常只有15μA;因此,它

•100%占空比低辍学率运行在整个负载上达到效率

•动态输出电压定位电流范围。TPS6220x只需要三个小的

•可在5针SOT23包装外部组件。和SOT23一起

软件包，的系统解决方案大小是

2应用程序实现。一种先进的快速响应电压模式

控制方案实现了线路和负载的优化

•PDAs和Pocket PCs调节，陶瓷输入输出量小

•手机和智能手机电容。

1 Features 3 Description

The TPS6220x devices are a family of high-efficiency 1• High-Efficiency Synchronous Step-Down

synchronous step-down converters ideally suited for Converter With up to 95% Efficiency portable systems powered by 1-cell Li-Ion or 3-cell

• 2.5-V to 6-V Input Voltage Range NiMH/NiCd batteries. The devices are also suitable to

• Adjustable Output Voltage Range From 0.7 V to VI operate from a standard 3.3-V or 5-V voltage rail.

• Fixed Output Voltage Options Available With an output voltage range of 6 V down to 0.7 V

• Up to 300-mA Output Current and up to 300 mA output current, the devices are

ideal to power low voltage DSPs and processors • 1-MHz Fixed-Frequency PWM Operation

used in PDAs, pocket PCs, and smart phones. Under

• Highest Efficiency Over Wide Load Current Range nominal load current, the devices operate with a fixed

Due to Power Save Mode switching frequency of typically 1 MHz. At light load

• 15-μA Typical Quiescent Current currents, the part enters the power save mode

• Soft Start operation; the switching frequency is reduced and the

quiescent current is typically only 15 μA; therefore, it

• 100% Duty Cycle Low-Dropout Operation achieves the highest efficiency over the entire load

• Dynamic Output-Voltage Positioning current range. The TPS6220x needs only three small

• Available in a 5-Pin SOT23 Package external components. Together with the SOT23

package, a minimum system solution size is

2 Applications achieved. An advanced fast response voltage mode

control scheme achieves superior line and load

• PDAs and Pocket PCs regulation with small ceramic input and output

• Cellular Phones and Smart Phones capacitors.