High-Performance PWM Controller CXMD3258 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. The CXMD3258 steps down high voltage to generate low-voltage

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The CXMD3258 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. The CXMD3258 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers. The CXMD3258 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the CXMD3258 provides very high efficiency over light to heavy loads with loading- modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency forlow-noise requirements. The CXMD3258 is equipped with accurate positive current- limit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-OnReset function monitors the voltage on VCC to prevent wrong operation during power-on. The CXMD3258 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 CXMD3258 is available in 10pin TDFN 3x3 package.

   产品特点 返回TOPlFA嘉泰姆

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Adjustable Output Voltage from +0.7V to +5.5VlFA嘉泰姆

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0.7V Reference VoltagelFA嘉泰姆

±1% Accuracy Over-TemperaturelFA嘉泰姆

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

Power-On-Reset Monitoring on VCC PinlFA嘉泰姆

Excellent Line and Load Transient ResponseslFA嘉泰姆

PFM Mode for Increased Light Load EfficiencylFA嘉泰姆

Selectable PWM Frequency from 4 Preset ValueslFA嘉泰姆

Integrated MOSFET DriverslFA嘉泰姆

Integrated Bootstrap Forward P-CH MOSFETlFA嘉泰姆

Adjustable Integrated Soft-Start and Soft-StoplFA嘉泰姆

Selectable Forced PWM or Automatic PFM/PWM ModelFA嘉泰姆

Power Good MonitoringlFA嘉泰姆

70% Under-Voltage ProtectionlFA嘉泰姆

125% Over-Voltage ProtectionlFA嘉泰姆

Adjustable Current-Limit ProtectionlFA嘉泰姆

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

Over-Temperature ProtectionlFA嘉泰姆

Auto Rework from Protection ModelFA嘉泰姆

TDFN-10 3x3 PackagelFA嘉泰姆

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

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NotebooklFA嘉泰姆

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Table PClFA嘉泰姆

Hand-Held PortablelFA嘉泰姆

AIO PClFA嘉泰姆

LCD Monitor / TVlFA嘉泰姆

Battery ChargerlFA嘉泰姆

ADSL ModemlFA嘉泰姆

Telecom / Networking EquipmentlFA嘉泰姆

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