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 +5.5Ve10嘉泰姆

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0.7V Reference Voltagee10嘉泰姆

±1% Accuracy Over-Temperaturee10嘉泰姆

Operates from an Input Battery Voltage Range of +1.8V to +32Ve10嘉泰姆

Power-On-Reset Monitoring on VCC Pine10嘉泰姆

Excellent Line and Load Transient Responsese10嘉泰姆

PFM Mode for Increased Light Load Efficiencye10嘉泰姆

Selectable PWM Frequency from 4 Preset Valuese10嘉泰姆

Integrated MOSFET Driverse10嘉泰姆

Integrated Bootstrap Forward P-CH MOSFETe10嘉泰姆

Adjustable Integrated Soft-Start and Soft-Stope10嘉泰姆

Selectable Forced PWM or Automatic PFM/PWM Modee10嘉泰姆

Power Good Monitoringe10嘉泰姆

70% Under-Voltage Protectione10嘉泰姆

125% Over-Voltage Protectione10嘉泰姆

Adjustable Current-Limit Protectione10嘉泰姆

Using Sense Low-Side MOSFET’s RDS(ON)e10嘉泰姆

Over-Temperature Protectione10嘉泰姆

Auto Rework from Protection Modee10嘉泰姆

TDFN-10 3x3 Packagee10嘉泰姆

Lead Free and Green Devices Available (RoHS Compliant)e10嘉泰姆

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