4.5V-60V Vin, 5A, High Efficiency Step-down DCDC Converter with Programmable Frequency.
SCT2651 SCT2651.pdf

No.12803

FEATURES

• Wide Input Range: 4.5V-60V

• Up to 5A Continuous Output Current

• 0.8V ±1% Feedback Reference Voltage

• Integrated 80mΩ High-Side

• Low Quiescent Current: 175uA

• Pulse Skipping Mode (PSM) in light load

• 130ns Minimum On-time

• Programmable Soft-start Time

• Adjustable Frequency 100KHz to 800KHz

• External Clock Synchronization

• Precision Enable Threshold for Programmable

  Input Voltage Under-Voltage Lock Out Protection

  (UVLO) Threshold and Hysteresis

• Low Dropout Mode Operation

• Derivable Inverting Voltage Regulator

• Over-voltage and Over-Temperature Protection

• Available in DFN-10L Package

DESCRIPTION

The SCT2651 is 5A buck converters with wide input

voltage, ranging from 4.5V to 60V, which integrates an

80mΩ high-side MOSFET. The SCT2651, adopting the

peak current mode control, supports the Pulse Skipping

Modulation (PSM) which assists the converter on

achieving high efficiency at light load or standby

condition.

The SCT2651 features programmable switching

frequency from 100kHz to 800KHz with an external

resistor, which provides the flexibility to optimize either

efficiency or external component size. The converter

supports external clock synchronization with a

frequency band from 100kHz to 800KHz. The SCT2651

allows power conversion from high input voltage to low

output voltage with a minimum 130ns on-time of highside

MOSFET.

The device offers programmable soft start to prevent

inrush current during the startup of output voltage

ramping. The SCT2651 features external loop

compensation to provide the flexibility to optimize either

loop stability or loop response.

The SCT2651 provides cycle-by-cycle current limit,

thermal shutdown protection, output over-voltage

protection and input voltage under-voltage protection.

The device is available in 4mm*4mm 10-pin DFN

package

APPLICATION CIRCUIT
PIN CONFIGUTION
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