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.

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Adjustable Output Voltage from +0.7V to +5.5Vv4u嘉泰姆

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0.7V Reference Voltagev4u嘉泰姆

±1% Accuracy Over-Temperaturev4u嘉泰姆

Operates from an Input Battery Voltage Range of +1.8V to +32Vv4u嘉泰姆

Power-On-Reset Monitoring on VCC Pinv4u嘉泰姆

Excellent Line and Load Transient Responsesv4u嘉泰姆

PFM Mode for Increased Light Load Efficiencyv4u嘉泰姆

Selectable PWM Frequency from 4 Preset Valuesv4u嘉泰姆

Integrated MOSFET Driversv4u嘉泰姆

Integrated Bootstrap Forward P-CH MOSFETv4u嘉泰姆

Adjustable Integrated Soft-Start and Soft-Stopv4u嘉泰姆

Selectable Forced PWM or Automatic PFM/PWM Modev4u嘉泰姆

Power Good Monitoringv4u嘉泰姆

70% Under-Voltage Protectionv4u嘉泰姆

125% Over-Voltage Protectionv4u嘉泰姆

Adjustable Current-Limit Protectionv4u嘉泰姆

Using Sense Low-Side MOSFET’s RDS(ON)v4u嘉泰姆

Over-Temperature Protectionv4u嘉泰姆

Auto Rework from Protection Modev4u嘉泰姆

TDFN-10 3x3 Packagev4u嘉泰姆

Lead Free and Green Devices Available (RoHS Compliant)v4u嘉泰姆

   应用范围 返回TOPv4u嘉泰姆

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Notebookv4u嘉泰姆

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Table PCv4u嘉泰姆

Hand-Held Portablev4u嘉泰姆

AIO PCv4u嘉泰姆

LCD Monitor / TVv4u嘉泰姆

Battery Chargerv4u嘉泰姆

ADSL Modemv4u嘉泰姆

Telecom / Networking Equipmentv4u嘉泰姆

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