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MP2905EK

更新时间： 2024-01-09 14:07:51
品牌 Logo 应用领域
芯源 - MPS 开关光电二极管
页数 文件大小 规格书
16页 532K
描述
Switching Controller, Current-mode, 500kHz Switching Freq-Max, PDSO10, MSOP-10

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MP2905EK 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：MSOP
包装说明：TSSOP,针数：10
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.18
其他特性：ALSO OPER IN VOLT MODE AND PWM CTRL TECH ALSO POS, OPE IN ADJUE MODE FROM 0.6 TO 25.2V模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：HYSTERETIC CURRENT MODE
最大输入电压：28 V最小输入电压：3 V
标称输入电压：12 VJESD-30 代码：S-PDSO-G10
长度：3 mm功能数量：1
端子数量：10最高工作温度：85 °C
最低工作温度：-20 °C标称输出电压：5 V
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.1 mm表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：500 kHz
温度等级：OTHER端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

MP2905EK 数据手册

 浏览型号MP2905EK的Datasheet PDF文件第1页浏览型号MP2905EK的Datasheet PDF文件第2页浏览型号MP2905EK的Datasheet PDF文件第3页浏览型号MP2905EK的Datasheet PDF文件第5页浏览型号MP2905EK的Datasheet PDF文件第6页浏览型号MP2905EK的Datasheet PDF文件第7页 
MP2905- 3V to 28V INPUT, HYSTERETIC SYNCHRONOUS STEP-DOWN CONTROLLER  
PIN FUNCTIONS  
Pin#  
Name Description  
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a  
resistive voltage divider from the output voltage. The feedback reference voltage is  
0.59V. See Setting the Output Voltage.  
1
FB  
SS  
Soft-start Control Input. SS controls the soft-start period. Connect a capacitor from SS to  
GND to set the soft-start period.  
A 0.01uF external capacitor sets the soft-start period to 4ms with an internal 84Kohm  
resistor.  
2
An internal 250nA current sink in hiccup mode gives approximately 10% duty cycle  
during fault conditions.  
3
4
REF  
Internal 5V LDO output. Bypass REF to GND with a 4.7uF or greater capacitor.  
Ground. Connect the exposed pad to pin 4  
GND  
Low-side Gate-Drive output. Drive the synchronous-rectifier MOSFET.  
Connect this pin to the gate of the synchronous MOSFET.  
5
LG  
High-Side Gate Drive Boost Input. BST supplies the drive for the high-side N-channel  
MOSFET switching. Connect a 0.1uF or greater capacitor from SW to BST to power the  
high side switch.  
6
BST  
MP2905 contains an internal BST regulator, so external schottky from REF to BST is not  
necessary.  
Switch Output. SW is the switching node that supplies power to the output. Connect the  
output LC filter from SW to the output load. Note that a capacitor is required from SW to  
BST to power the high-side switch.  
7
8
9
SW  
HG  
IN  
High-side gate-drive output. Drive the high-side MOSFET. Connect this pin to the gate of  
the high-side MOSFET  
Power Input. IN supplies the power to the IC, as well as the step-down converter  
switches. Drive IN with a 3V to 28V power source. Bypass IN to GND with a suitably  
large capacitor to eliminate noise on the input to the IC. See Setting the Input Capacitor.  
Current-limit threshold Set pin. A appropriate resistor should be connected between this  
pin and the drain of high-side MOSFET (IN). An internal 50uA current sink sets a voltage  
drop in the resistor. The voltage drop compares to high-side MOSFET voltage drop (Vds)  
to set the peak current-limit threshold.  
10  
ILIM  
MP2905 Rev. 0.91  
4/18/2011  
www.monolithicpower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011. All Rights Reserved.  
4
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