供应德州仪器的升压- 降压稳压器IC TPS63021DSJ
电源管理 > DC/DC 开关稳压器 > 转换器（集成开关） > 降压/升压转换器 >
类别 PMIC - 稳压器 - DC DC 开关稳压器
描述 IC REG BUCK BST SYNC 3.3V 14VSON
制造商 Texas Instruments
类型 降压（降压），升压（升压）
输出类型 固定
输出数 1
电压_输出 3.3V
电压_输入 1.8 V ~ 5.5 V
PWM类型 电流模式
频率_开关 2.4MHz
电流_输出 3A
同步整流器 是
工作温度 -40°C ~ 85°C
安装类型 表面贴装
封装/外壳 14-VSON 裸露焊盘，14-HVSON 
包装 剪切带 (CT)
封装 14-VSON

参数 与其它产品相比 降压/升压转换器

描述

The TPS6302x devices provide a power supply solution for products 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 3A 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 typical value of 4A. 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 14-pin QFN PowerPAD package measuring 3 × 4 mm (DSJ).


Capacitor C4 and resistor R1 are added for improved load transient performance.
特性


Up to 96% Efficiency
3A Output Current at 3.3V in Step Down Mode (VIN = 3.6V to 5.5V)
More than 2A Output Current at 3.3V in Boost Mode (VIN > 2.5V)
Automatic Transition Between Step Down and Boost Mode
Dynamic Input Current Limit
Device Quiescent Current less than 50μA
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 at 2.4MHz and Synchronization 
Possible
Smart Power Good Output
Load Disconnect During Shutdown
Overtemperature Protection
Overvoltage Protection

Available in a 3 × 4-mm, QFN-14 Package

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