目录

1.产品概述       2.产品特点     b85嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）b85嘉泰姆

5.产品封装       6.电路原理图  b85嘉泰姆

7.相关产品b85嘉泰姆

   产品概述 返回TOPb85嘉泰姆

The CXMD3259 is a single‐phase, constant‐on‐time, synchronous PWM controller, which drives N‐channel MOSFETs. The CXMD3259 steps down high voltage to generate low‐voltage chipset or RAM supplies in notebook computers. The CXMD3259 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXMD3259 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 CXMD3259 is equipped with accurate positive current‐ limit, output under‐voltage, and output over‐voltage protections, perfect for NB applications. The Power‐On‐  Reset function monitors the voltage on VCC to prevent wrong operation during power‐on. The CXMD3259 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 CXMD3259 is available in 10pin TDFN 3x3 package.

   产品特点 返回TOPb85嘉泰姆

z Adjustable Output Voltage from +0.7V to +5.5V b85嘉泰姆

z 0.7V Reference Voltage b85嘉泰姆

z ±1% Accuracy Over‐Temperature b85嘉泰姆

z Operates from an Input Battery Voltage Range of +1.8V to +32V b85嘉泰姆

z Power‐On‐Reset Monitoring on VCC Pin b85嘉泰姆

z Excellent Line and Load Transient Responses z PFM Mode for Increased Light Load Efficiency b85嘉泰姆

z Selectable PWM Frequency from 4 Preset Values b85嘉泰姆

z Integrated MOSFET Drivers b85嘉泰姆

z Integrated Bootstrap Forward P‐CH MOSFET b85嘉泰姆

z Adjustable Integrated Soft‐Start and Soft‐Stop b85嘉泰姆

z Selectable Forced PWM or Automatic PFM/PWM Mode b85嘉泰姆

z Power Good Monitoring b85嘉泰姆

z 70% Under‐Voltage Protection b85嘉泰姆

z 125% Over‐Voltage Protection b85嘉泰姆

z Adjustable Current‐Limit Protection b85嘉泰姆

z Using Sense Low‐Side MOSFET’s RDS(ON) b85嘉泰姆

z Over‐Temperature Protection b85嘉泰姆

z Auto Rework from Protection Mode b85嘉泰姆

z TDFN‐10 3x3 Package b85嘉泰姆

z Lead Free and Green Devices Available (RoHS Compliant)b85嘉泰姆

   应用范围 返回TOPb85嘉泰姆

z Notebook b85嘉泰姆

z Table PC b85嘉泰姆

z Hand‐Held Portable b85嘉泰姆

z AIO PC b85嘉泰姆

z LCD Monitor / TV b85嘉泰姆

z Battery Charger b85嘉泰姆

z ADSL Modem b85嘉泰姆

z Telecom / Networking Equipmentb85嘉泰姆

   技术规格书（产品PDF) 返回TOP b85嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！b85嘉泰姆

 b85嘉泰姆

产品封装图 返回TOPb85嘉泰姆

b85嘉泰姆

电路原理图 返回TOPb85嘉泰姆

b85嘉泰姆

相关芯片选择指南 返回TOP                    更多同类产品......