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NCP1500

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Dual Mode PWM/Linear BUCK Converter

NCP1500 Dual Mode PWM/Linear BUCK Converter The NCP1500 is a dual mode converter that operates as either a pulse width ...



NCP1500

ON


Octopart Stock #: O-473319

Findchips Stock #: 473319-F

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Description
NCP1500 Dual Mode PWM/Linear BUCK Converter The NCP1500 is a dual mode converter that operates as either a pulse width modulated (PWM) buck converter or as a linear regulator. The converter automatically transitions between the two modes. The converter operates as a PWM when a synchronization signal is present at the sync input. The converter operates as a linear regulator in the absence of a synchronization signal. The PWM mode offers excellent performance at normal to heavy loads at the sacrifice of output ripple voltage. The linear mode offers excellent noise rejection at the sacrifice of system efficiency. The user is able to select which mode will give the best performance for a given operating condition. Internal protection features include thermal shutdown with hysteresis and cycle−by−cycle current limit in the PWM mode. Additionally, the converter transitions into PFM mode at very light loads if a synchronization signal is present and an output overvoltage condition is detected. PWM Features • Current Mode Control with Cycle−by−Cycle Current Limit • Nominal Synchronization Frequency of 270 to 630 kHz • Built−in Slope Compensation Linear Regulator Features • Low Output Noise Overall Features • Thermal Shutdown with Hysteresis • Digitally Programmable Output Voltage Between 4 Voltages: 1.0, 1.3, 1.5, and 1.8 • Fast Transient Response • Input Voltage Range From 2.7 V to 5.4 V • Space Saving Micro8 Package • Low Shutdown Current of 0.18 mA Typical • Pb−Free Package is Av...




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