LM2854 Series

4A 500 kHz / 1 MHz Synchronous Buck Regulator

Catalog

4A 500 kHz / 1 MHz Synchronous Buck Regulator

Part	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Output Type	Number of Outputs	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Function	Current - Output	Mounting Type	Supplier Device Package	Voltage - Output (Max)	Package / Case	Package / Case	Topology	Voltage - Input (Min) [Min]	Frequency - Switching	Voltage - Output	Board Type	Supplied Contents	Utilized IC / Part	Main Purpose	Regulator Topology	Outputs and Type	Outputs and Type
Texas Instruments LM2854MHX-1000/NOPB	85 °C	-40 °C	Positive	Adjustable	1	5.5 V	0.8 V	Step-Down	4 A	Surface Mount	16-HTSSOP	5 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Buck	2.95 V	1.05 MHz
Texas Instruments LM2854MH-500/NOPB	85 °C	-40 °C	Positive	Adjustable	1	5.5 V	0.8 V	Step-Down	4 A	Surface Mount	16-HTSSOP	5 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Buck	2.95 V	525 kHz
Texas Instruments LM2854MH-1000/NOPB	85 °C	-40 °C	Positive	Adjustable	1	5.5 V	0.8 V	Step-Down	4 A	Surface Mount	16-HTSSOP	5 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Buck	2.95 V	1.05 MHz
Texas Instruments LM2854-1000EVAL									4 A								1 MHz	1.2 V	Fully Populated	Board(s)	LM2854	DC/DC Step Down	Buck	Non-Isolated	1

Catalog

4A 500 kHz / 1 MHz Synchronous Buck Regulator

Key Features

• Input Voltage Range of 2.95 V to 5.5 VMaximum Load Current of 4 AWide Bandwidth Voltage Mode Control Loop, Partial Internal CompensationFixed Switching Frequency of 500 kHz or 1 MHz35-mΩ Integrated MOSFET SwitchesAdjustable Output Voltage Down to 0.8 VOptimized Reference Voltage Initial Accuracy and Temperature DriftExternal Soft-Start Control With Tracking CapabilityEnable Pin With HysteresisLow Standby Current of 230 µAPre-Biased Load Start-up CapabilityIntegrated UVLO, OCP, and Thermal Shutdown100% Duty Cycle CapabilityHTSSOP-16 Exposed Pad PackageInput Voltage Range of 2.95 V to 5.5 VMaximum Load Current of 4 AWide Bandwidth Voltage Mode Control Loop, Partial Internal CompensationFixed Switching Frequency of 500 kHz or 1 MHz35-mΩ Integrated MOSFET SwitchesAdjustable Output Voltage Down to 0.8 VOptimized Reference Voltage Initial Accuracy and Temperature DriftExternal Soft-Start Control With Tracking CapabilityEnable Pin With HysteresisLow Standby Current of 230 µAPre-Biased Load Start-up CapabilityIntegrated UVLO, OCP, and Thermal Shutdown100% Duty Cycle CapabilityHTSSOP-16 Exposed Pad Package

Description

The LM2854 PowerWise™ buck regulator is a 500-kHz or 1-MHz step-down switching voltage regulator capable of driving up to a 4-A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LM2854 can accept an input voltage rail between 2.95 V and 5.5 V, and deliver an adjustable and highly accurate output voltage as low as 0.8 V. Externally established soft-start with a small capacitor facilitates controlled start-up, and the LM2854 is capable of starting gracefully into a pre-biased output voltage. Partial internal compensation reduces the number of external passive components and PC board space typically necessary in a voltage mode buck converter application, yet preserving flexibility to deal with ceramic and/or electrolytic based load capacitors. Lossless cycle-by-cycle peak current limit is used to protect the load from an overcurrent or short-circuit fault, and an enable comparator simplifies sequencing applications. The LM2854 is available in an exposed pad HTSSOP-16 package that enhances the thermal performance of the regulator. The LM2854 PowerWise™ buck regulator is a 500-kHz or 1-MHz step-down switching voltage regulator capable of driving up to a 4-A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LM2854 can accept an input voltage rail between 2.95 V and 5.5 V, and deliver an adjustable and highly accurate output voltage as low as 0.8 V. Externally established soft-start with a small capacitor facilitates controlled start-up, and the LM2854 is capable of starting gracefully into a pre-biased output voltage. Partial internal compensation reduces the number of external passive components and PC board space typically necessary in a voltage mode buck converter application, yet preserving flexibility to deal with ceramic and/or electrolytic based load capacitors. Lossless cycle-by-cycle peak current limit is used to protect the load from an overcurrent or short-circuit fault, and an enable comparator simplifies sequencing applications. The LM2854 is available in an exposed pad HTSSOP-16 package that enhances the thermal performance of the regulator.