目录

1.产品概述       2.产品特点     VwK嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）VwK嘉泰姆

5.产品封装       6.电路原理图  VwK嘉泰姆

7.相关产品VwK嘉泰姆

   产品概述 返回TOPVwK嘉泰姆

The CXMD3257 is a single‐phase, constant‐on‐time, synchronous PWM controller, which drives N‐channel MOSFETs. The CXMD3257 steps down high voltage to generate low‐voltage chipset or RAM supplies in notebook computers. The CXMD3257 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXMD3257 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 CXMD3257 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 CXMD3257 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 CXMD3257 is available in 10pin TDFN 3x3 package.

   产品特点 返回TOPVwK嘉泰姆

l  Adjustable Output Voltage from +0.7V to +5.5VVwK嘉泰姆

l  0.7V Reference VoltageVwK嘉泰姆

l  ±1% Accuracy Over-TemperatureVwK嘉泰姆

l  Operates from an Input Battery Voltage Range of +1.8V to +32VVwK嘉泰姆

l  Power-On-Reset Monitoring on VCC PinVwK嘉泰姆

l  Excellent Line and Load Transient ResponsesVwK嘉泰姆

l  PFM Mode for Increased Light Load EfficiencyVwK嘉泰姆

l  Selectable PWM Frequency from 4 Preset ValuesVwK嘉泰姆

l  Integrated MOSFET DriversVwK嘉泰姆

l  Integrated Bootstrap Forward P-CH MOSFETVwK嘉泰姆

l  Adjustable Integrated Soft-Start and Soft-StopVwK嘉泰姆

l  Selectable Forced PWM or Automatic PFM/PWM ModeVwK嘉泰姆

l  Power Good MonitoringVwK嘉泰姆

l  70% Under-Voltage ProtectionVwK嘉泰姆

l  125% Over-Voltage ProtectionVwK嘉泰姆

l  Adjustable Current-Limit ProtectionVwK嘉泰姆

l  Using Sense Low-Side MOSFET’s RDS(ON)VwK嘉泰姆

l  Over-Temperature ProtectionVwK嘉泰姆

l  TDFN-10 3x3 PackageVwK嘉泰姆

l  Lead Free and Green Devices Available (RoHS Compliant)VwK嘉泰姆

   应用范围 返回TOPVwK嘉泰姆

l  NotebookVwK嘉泰姆

l  Table PCVwK嘉泰姆

l  Hand-Held PortableVwK嘉泰姆

l  AIO PCVwK嘉泰姆

l  LCD Monitor / TVVwK嘉泰姆

l  Battery ChargerVwK嘉泰姆

l  ADSL ModemVwK嘉泰姆

   技术规格书（产品PDF) 返回TOP VwK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！VwK嘉泰姆

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产品封装图 返回TOPVwK嘉泰姆

VwK嘉泰姆

电路原理图 返回TOPVwK嘉泰姆

VwK嘉泰姆

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