NCP1546 Series

1.5 A, 170 kHz, Low Voltage Buck Regulator with Synchronization Capability

Catalog

1.5 A, 170 kHz, Low Voltage Buck Regulator with Synchronization Capability

Part	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Voltage - Output (Max)	Topology	Number of Outputs	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Current - Output	Frequency - Switching	Package / Case	Supplier Device Package	Output Configuration	Synchronous Rectifier	Function
ON Semiconductor NCP1546MNR2G	Adjustable	0 °C	150 °C	Surface Mount	38 V	Buck	1	0.32 V	4 V	1.5 A	170 kHz	18-VFDFN Exposed Pad	18-DFN (5x6)	Positive		Step-Down

Catalog

1.5 A, 170 kHz, Low Voltage Buck Regulator with Synchronization Capability

Key Features

• V2™ Control Architecture

• 2.0% Error Amp Reference Voltage Tolerance

• Cycle-by-Cycle Current Limiting

• Switch Frequency Decrease of 4:1 in Short Circuit

• Bootstrapped Operation (BOOST)

• Synchronization to External Clock (SYNC)

• 1.0 A Shutdown Quiescent Current

• Thermal Shutdown

• Soft-Start

• Pb-Free Packages are Available

Description

The NCP1546 is a 1.5 A buck regulator IC operating at a fixed frequency of 170 kHz. The device employs the V2™ control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation. The NCV8842 accommodates input voltages from 4.0 V to 40 V and contains synchronization circuitry. The on-chip NPN transistor is capable of providing a minimum of 1.5 A of output current and is biased by an external boost capacitor to ensure saturation, thus minimizing on-chip power dissipation. Protection circuitry includes thermal shutdown, cycle-by-cycle current limiting and frequency foldback short-circuit protection.