TI 的具有 1.8A 电流开关的 96% 升压降压转换器IC TPS63000DRCR
半导体 > 电源管理 > 开关稳压器 > DC/DC 转换器（集成开关） > 升压 - 降压稳压器 > TPS63000
High Efficient Single Inductor Buck-Boost Converter with 1.8-A Switch

说明
The TPS6300x devices provide a power supply solution forproducts powered by either a two-cell or three-cell alkaline, NiCd or NiMH battery, or a one-cell Li-Ion or Li-polymer battery. Output currents can go as high as 1200 mA while using a single-cell Li-Ion or Li-Polymer Battery, and discharge it down to 2.5V or lower. The buck-boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters Power Save mode to maintain high efficiency over a wide load current range. The Power Save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The maximum average current in the switches is limited to a t*ical value of 1800 mA. The output voltage is programmable using an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is disconnected from the battery. The device is packaged in a 10-pin QFN PowerPAD package measuring 3 mm × 3 mm (DRC).

特性
Up to 96% Efficiency
1200-mA Output Current at3.3V in Step Down Mode (VIN = 3.6V to 5.5V)
Up to 800-mA Output Current at 3.3V in Boost Mode (VIN > 2.4V)
Automatic Transition between Step Down and Boost Mode
Device Quiescent Current less than 50 µA
Input Voltage Range: 1.8V to 5.5V
Fixed and Adjustable Output Voltage Options from 1.2V to 5.5V
Power Save Mode for Improved Efficiency at Low Output Power
Forced Fixed Frequency Operation and Synchronization possible
Load Disconnect During Shutdown
Over-Temperature Protection
Available in Small 3 mm × 3 mm, QFN-10 Package

   *的 TPS63000 升压/降压 DC/DC 转换器能够在电流* 1.2 A、输入电压为 1.8 V 到 5.5 V 的宽广范围内提供* 96% 的峰值效率。与输出为 3.3 V 的标准降压转换器相比，TPS63000 能够使运行时间延长达 28%，从而延长了以单体锂离子电池供电的多媒体手持设备的电池使用寿命，*这些特性均包含在节省空间的 3 x 3 平方毫米 QFN 封装中。

   以下情况效率达 90% 以上
•  在降压模式下电压为 3.3V 时输出电流为 800mA (VIN 3.6 V...5.5 V) 
•  在升压模式下电压为 3.3V 或 5V 时输出电流为 600mA (VIN 3.0 V...4.2 V)
•  在降压和升压模式之间自动转换
•  器件静态电流低于 30µA 
•  输入电压范围：1.8V 至 5.5V 
•  输出电压可以是固定的，也可以调节，范围是 1.2V 至 5.5V 
•  省电模式，*低输出功率时的效率
•  使以强制的固定频率工作成为可能
•  停机期间负载断开
•  过温保护
•  小型 3 x 3 平方毫米 QFN-10 封装

 

APPLICATIONS 应用
All Two-Cell and Three-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered Products
Portable Audio Players
PDAs
Cellular Phones
Personal Medical Products
White LEDs
•  *以双体及三体碱性、NiCd、NiMH 或单体锂电池供电的产品
•  便携音频播放器
•  PDA
•  手机
•  个人*产品
•  白色 LED

 

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36952200

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