CXMD3260是一个单相、恒定时间、同步的脉宽调制控制器，驱动N通道mosfet。CXMD3260逐步降低高压，以在笔记本电脑中生成低压芯片组或RAM。CXMD3260在PFM或PWM模式下提供了出色的瞬态响应和精确的直流电压输出。在脉冲频率模式（PFM）中，CXMD3260在负载调制开关频率的轻到重负载上提供非常高的效率。在PWM模式下，为了达到低噪声的要求，变换器几乎以恒定频率工作。CXMD3260配备了精确的正电流限制、输出欠压和输出过压保护，非常适合NB应用。通电复位功能监控VCC上的电压，以防止通电期间出现错误操作。CXMD3260具有1毫秒数字软启动和内置的软停止综合输出放电方法。内部集成的软启动以可编程的转换率提高输出电压，以降低启动电流。软停止功能利用受控的反向电感电流对输出电容器进行主动放电。CXMD3260提供10针TDFN 3x3产品包。
电磁干扰测试容易通过
从+0.7V到+5.5V的可调输出电压0.7V参考电压±1%的精度超温
在+1.8V至+36V的输入电池电压范围内运行
•VCC引脚上的通电复位监控
优良的线路和负载瞬态响应
提高轻载效率的PFM模式
从4个预设值中选择脉宽调制频率
集成MOSFET驱动器
集成自举正向P-CH MOSFET
可调软启动和软停止集成
可选的强制脉冲宽度调制或自动脉冲频率调制/脉冲宽度调制模式
电力良好监测
70%欠压保护
•125%过电压保护
使用Sense低侧MOSFET的RDS（ON）可调限流保护
过温保护
从保护模式自动返工
•TDFN‐10 3x3包
提供无铅和绿色设备（符合RoHS）
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[ CXMD3260 ]
目录
7.相关产品
产品概述 返回TOP
The CXMD3260 is a single‐phase, constant‐on‐time, synchron‐ ous PWM controller, which drives N‐channel MOSFETs. The CXMD3260 steps down high voltage to generate low voltage chipset or RAM suppliesin notebook computers. The CXMD3260 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXMD3260 provides very high efficiency over light to heavy loads with loading‐ modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low‐noise requirements. The CXMD3260 is equipped with accurate positive current‐ limit, output under‐voltage, and output over‐voltage prote‐ ctions, perfect for NB applications. The Power‐On‐ Reset function monitors the voltage on VCC to prevent wrong operation during power‐on. The CXMD3260 has a 1ms digital soft‐start and built‐in an integrated output discharge method for soft‐stop. An internal integrated soft‐start ramps up the output voltage with programmable slew rate to reduce the start‐up current. A soft‐stop function actively discharges the output capacitors with controlled reverse inductor current. The CXMD3260 is available in 10pin TDFN 3x3 package.
产品特点 返回TOP
Easy pass EMI test
Adjustable Output Voltage from +0.7V to +5.5V 0.7V Reference Voltage ±1% Accuracy Over‐Temperature
Operates from an Input Battery Voltage Range of +1.8V to +36V
Power‐On‐Reset Monitoring on VCC Pin
Excellent Line and Load Transient Responses
PFM Mode for Increased Light Load Efficiency
Selectable PWM Frequency from 4 Preset Values
Integrated MOSFET Drivers
Integrated Bootstrap Forward P‐CH MOSFET
Adjustable Integrated Soft‐Start and Soft‐Stop
Selectable Forced PWM or Automatic PFM/PWM Mode
Power Good Monitoring
70% Under‐Voltage Protection
125% Over‐Voltage Protection
Using Sense Low‐Side MOSFET’s RDS(ON) adjustable Current‐Limit Protection
Over‐Temperature Protection
Auto Rework from Protection Mode
TDFN‐10 3x3 Package
Lead Free and Green Devices Available (RoHS Compliant)
应用范围 返回TOP
Notebook
Table PC
Hand‐Held Portable
AIO PC
LCD Monitor / TV
Battery Charger
ADSL Modem
Telecom / Networking Equipment
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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PWM Controller(脉宽调制控制器) |
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Part No. |
Input Voltage |
Output Voltage |
Frequency |
Efficiency |
Package |
precision |
Over |
Over |
Short Protection |
|
Current |
Temperature |
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|
Protection |
Protection |
||||||||
|
16V |
ADJ |
300KHZ |
93% |
SOP8/DFN3*3-10DFN3*3-10 |
2% |
Y |
Y |
Y |
|
|
16V |
ADJ |
200KHz/300KHZ /600KHz |
93% |
SOP8/ DFN3*3-10 |
2% |
Y |
Y |
Y |
|
|
35V |
ADJ |
290-430KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
|
35V |
ADJ |
290-430KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
|
35V |
ADJ |
135-215KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
|
35V |
ADJ |
135-215KHz |
93% |
DFN3*3-10 |
2% |
Y |
Y |
Y |
|
|
40V |
- |
100-300KHz |
- |
QFN20 |
Y |
Y |
Y |
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