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UC2870QTR-2 PDF预览

UC2870QTR-2

更新时间: 2024-11-21 20:10:51
品牌 Logo 应用领域
德州仪器 - TI 开关
页数 文件大小 规格书
10页 354K
描述
1A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20

UC2870QTR-2 技术参数

生命周期:Obsolete零件包装代码:QLCC
包装说明:QCCJ,针数:20
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.76
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:24 V
最小输入电压:12 V标称输入电压:12 V
JESD-30 代码:S-PQCC-J20长度:8.965 mm
功能数量:1端子数量:20
最高工作温度:85 °C最低工作温度:-25 °C
最大输出电流:1 A封装主体材料:PLASTIC/EPOXY
封装代码:QCCJ封装形状:SQUARE
封装形式:CHIP CARRIER认证状态:Not Qualified
座面最大高度:4.57 mm表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:300 kHz
温度等级:OTHER端子形式:J BEND
端子节距:1.27 mm端子位置:QUAD
宽度:8.965 mmBase Number Matches:1

UC2870QTR-2 数据手册

 浏览型号UC2870QTR-2的Datasheet PDF文件第2页浏览型号UC2870QTR-2的Datasheet PDF文件第3页浏览型号UC2870QTR-2的Datasheet PDF文件第4页浏览型号UC2870QTR-2的Datasheet PDF文件第5页浏览型号UC2870QTR-2的Datasheet PDF文件第6页浏览型号UC2870QTR-2的Datasheet PDF文件第7页 
UC1870 -1/ -2  
UC2870 -1/ -2  
UC3870 -1/ -2  
High Efficiency, Synchronous, Step-down (Buck) Controllers  
FEATURES  
DESCRIPTION  
Not Recommended for New Designs.  
Operation to 36V Input Voltage  
The UC3870 family of synchronous step-down (Buck) regulators provides  
high efficiency power conversion from an input voltage range of 4.5 to 36  
volts. The UC3870 is tailored for battery powered applications such as lap-  
top computers, consumer products, communications systems, and aero-  
space which demand high performance and long battery life. The  
synchronous regulator replaces the catch diode in the standard buck regu-  
lator with a low Rds(on) N-channel MOSFET switch allowing for significant  
efficiency improvements. The high side N-channel MOSFET switch is  
driven out of phase from the low side N-channel MOSFET switch by an  
on-chip bootstrap circuit which requires only a single external capacitor to  
develop the regulated gate drive. Fixed frequency, average current mode  
control provides the regulator with inherent slope compensation, tight regu-  
lation of the output voltage, and superior load and line transient response.  
Switching frequencies up to 300kHz are possible.  
Fixed Frequency Average Current  
Mode Control  
2V to 3.5V Output Voltage when  
Combined with UC3910 Precision  
Reference/DAC  
Drives External N-Channel MOSFETs  
for Highest Efficiency  
Sleep Mode Current <75mA  
Complementary 1 Amp Outputs with  
Regulated Gate Drive Voltage  
LDO (Low Drop Out) Virtual 100%  
The UC3870-1,-2 is designed to interface directly with precision references  
like the UC3910. When combined with the UC3910, output voltages be-  
tween 2V to 3.5V in 100mV increments and ± 1% accuracy are attainable.  
This makes the UC3870-1,-2 ideal for powering high performance micro-  
processors like the Intel Pentium Pro and others.  
Duty Cycle Operation  
Non-Overlapping Gate Drives  
(continued)  
BLOCK DIAGRAM  
UDG-96158  
Pin Numbers refer to the DIL-18 Package.  
8/98  

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