NCP1581DR2G

Frequency - Switching:	400kHz
Base Part Number:	NCP1581
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 125°C (TJ)
Control Features:	Enable, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	85%
Series:	--
Voltage - Supply (Vcc/Vdd):	6.3 V ~ 20 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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NCP1581DR2G Application Field and Working PrincipleNCP1581DR2G is a DC DC Switching Controller designed by ON Semiconductor. It is a very popular choice of PMIC - Voltage Regulators due to its wide range of features and excellent performance.NCP1581DR2G is designed to provide excellent current and efficiency levels. It can provide a constant voltage output, even when the input voltage varies between 0 and 45V, and can slew its output current up to 100A. This switching controller also offers thermal protection and Fault Flag status, making it a great choice for use in applications such as automotive, industrial and other demanding applications.NCP1581DR2G is a fixed frequency, step-down DC-DC converter featuring PFM pulse-width modulation (PWM) mode, fixed frequency PWM mode and skip PWM mode. The device can automatically transition between different modes of operation, providing excellent current efficiency and load transient response.The main features of NCP1581DR2G are the overload and thermal protection circuitry, enabling it to protect itself and the load device from overload or over-temperature conditions. Its fault flag status indicates an operating error so that the system can diagnose the fault and recover from it quickly.Additionally, NCP1581DR2G comes with an adjustable Oscillator frequency, which allows users to fine-tune it for different application requirements. Furthermore, this switching controller comes with a variable resistor to ensure better transient response when the load switches.In terms of its system architecture, the NCP1581DR2G uses a single-stage synchronous buck topology. To perform its step-down conversion, the device uses two low-side switch and two high-side switch MOSFETs which are switched at the same frequency. The output of the converter is directly optimized for Vin range, which results in a constant output current across the entire input voltage range of 0 to 5V.Additionally, the low quiescent current reduces power dissipation when the controller is not actively controlling the load, increasing the overall efficiency of the system.Overall, the NCP1581DR2G is an excellent choice of PMIC - Voltage Regulators due to its wide range of features, excellent performance and excellent value. It is suitable for a wide range of applications such as automotive, industrial and other demanding applications.

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