CXMD3259 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. CXMD3259 steps down high voltage to generate low-voltage chipset or RAMsupplies in not

   产品概述 返回TOPtBs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TOPtBs嘉泰姆

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

z 0.7V Reference Voltage tBs嘉泰姆

z ±1% Accuracy Over‐Temperature tBs嘉泰姆

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

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

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

z Selectable PWM Frequency from 4 Preset Values tBs嘉泰姆

z Integrated MOSFET Drivers tBs嘉泰姆

z Integrated Bootstrap Forward P‐CH MOSFET tBs嘉泰姆

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

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

z Power Good Monitoring tBs嘉泰姆

z 70% Under‐Voltage Protection tBs嘉泰姆

z 125% Over‐Voltage Protection tBs嘉泰姆

z Adjustable Current‐Limit Protection tBs嘉泰姆

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

z Over‐Temperature Protection tBs嘉泰姆

z Auto Rework from Protection Mode tBs嘉泰姆

z TDFN‐10 3x3 Package tBs嘉泰姆

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

   应用范围 返回TOPtBs嘉泰姆

z Notebook tBs嘉泰姆

z Table PC tBs嘉泰姆

z Hand‐Held Portable tBs嘉泰姆

z AIO PC tBs嘉泰姆

z LCD Monitor / TV tBs嘉泰姆

z Battery Charger tBs嘉泰姆

z ADSL Modem tBs嘉泰姆

z Telecom / Networking EquipmenttBs嘉泰姆

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