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UC2870Q-1 PDF预览

UC2870Q-1

更新时间： 2024-11-01 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

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中文翻译

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UC2870Q-1 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QLCC包装说明：PLASTIC, LCC-20
针数：20Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.84Is Samacsys：N
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封装等效代码：LDCC20,.4SQ
封装形状：SQUARE封装形式：CHIP CARRIER
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：4.57 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：300 kHz技术：BIPOLAR
温度等级：OTHER端子形式：J BEND
端子节距：1.27 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：8.965 mm
Base Number Matches：1

UC2870Q-1 数据手册

 浏览型号UC2870Q-1的Datasheet PDF文件第2页浏览型号UC2870Q-1的Datasheet PDF文件第3页浏览型号UC2870Q-1的Datasheet PDF文件第4页浏览型号UC2870Q-1的Datasheet PDF文件第5页浏览型号UC2870Q-1的Datasheet PDF文件第6页浏览型号UC2870Q-1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  
1234567...10

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