Single Buck Voltage Mode PWM Controller CXMD3255 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. The CXMD3255 allows wide input voltage that is either a single 5~12V

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The CXMD3255 is a voltage mode, fixed 300kHz switching frequency, synchronous buck converter. The CXMD3255 allows wide input voltage that is either a single 5~12V or two supply voltage(s) for various applications. A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. A builtin soft-start circuit prevents the output voltages from overshoot as well as limits the input current. An internal 0.8V temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low output voltage applications. The CXMD3255 provides excellent output voltage regulations against load current variation. The controller’s over-current protection monitors the output current by using the voltage drop across the RDS(ON) of low-side MOSFET, eliminating the need for a current sensing resistor that features high efficiency and low cost. In addition, the CXMD3255 also integrates excellent protection functions: The over-voltage protection (OVP) , under- voltage protection (UVP). OVP circuit which monitors the FB voltage to prevent the PWM output from overvoltage,and UVP circuit which monitors the FB voltage to prevent the PWM output from under-voltage or short-circuit.The CXMD3255is available in SOP-8P and TDFN3x3-10 packages.

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l  Wide 5V to 16V Supply VoltagesGn嘉泰姆

l  Power-On-Reset Monitoring on VCCsGn嘉泰姆

l  Excellent Output Voltage Regulations 0.8VsGn嘉泰姆

   Internal Reference ±1% Over-Temperature RangesGn嘉泰姆

l  Integrated Soft-StartsGn嘉泰姆

l  Voltage Mode PWM Operation with External CompensationsGn嘉泰姆

l  Up to 90% Duty Ratio for Fast Transient ResponsesGn嘉泰姆

l  Constant Switching Frequency 300kHz ±10%sGn嘉泰姆

l  Drive Dual Low Cost N-MOSFETs with Adaptive Dead-Time ControlsGn嘉泰姆

l  50% Under-Voltage ProtectionsGn嘉泰姆

l  125% Over-Voltage ProtectionsGn嘉泰姆

l  Adjustable Over-Current Protection Threshold Using the RDS(ON) of Low-Side MOSFETsGn嘉泰姆

l  Shutdown Control by COMPsGn嘉泰姆

l  Power Good Monitoring (TDFN-10 3mmx3mm Package Only)sGn嘉泰姆

l  SOP-8P and TDFN3x3-10 PackagessGn嘉泰姆

l  Lead Free and Green Devices Available (RoHS CompliantsGn嘉泰姆

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