LM25018 Series

7.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Catalog

7.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Part	Frequency - Switching [Max]	Output Type	Package / Case	Topology	Output Configuration	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]	Mounting Type	Number of Outputs	Voltage - Output (Min/Fixed)	Function	Voltage - Input (Max) [Max]	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Package / Case [y]	Package / Case [x]
Texas Instruments LM25018SDE/NOPB	1 MHz	Adjustable	8-WDFN Exposed Pad	Buck	Positive	40 V	7.5 V	Surface Mount	1	1.225 V	Step-Down	48 V	325 mA	-40 °C	125 ¯C	8-WSON (4x4)
Texas Instruments LM25018SDX/NOPB	1 MHz	Adjustable	8-WDFN Exposed Pad	Buck	Positive	40 V	7.5 V	Surface Mount	1	1.225 V	Step-Down	48 V	325 mA	-40 °C	125 ¯C	8-WSON (4x4)
Texas Instruments LM25018MR/NOPB	1 MHz	Adjustable	8-PowerSOIC	Buck	Positive	40 V	7.5 V	Surface Mount	1	1.225 V	Step-Down	48 V	325 mA	-40 °C	125 ¯C	8-SO PowerPad	3.9 mm	0.154 in
Texas Instruments LM25018MRX/NOPB	1 MHz	Adjustable	8-PowerSOIC	Buck	Positive	40 V	7.5 V	Surface Mount	1	1.225 V	Step-Down	48 V	325 mA	-40 °C	125 ¯C	8-SO PowerPad	3.9 mm	0.154 in

Catalog

7.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Key Features

• Wide 7.5-V to 48-V input rangeIntegrated 325-mA, high-side and low-side switchesNo schottky requiredConstant on-time controlNo loop compensation requiredUltra-fast transient responseNearly constant operating frequencyIntelligent peak current limitAdjustable output voltage from 1.225 VPrecision 2% feedback referenceFrequency adjustable to 1 MHzAdjustable undervoltage lockoutRemote shutdownThermal shutdownCreate a custom design using the LM25018 with theWEBENCH Power DesignerWide 7.5-V to 48-V input rangeIntegrated 325-mA, high-side and low-side switchesNo schottky requiredConstant on-time controlNo loop compensation requiredUltra-fast transient responseNearly constant operating frequencyIntelligent peak current limitAdjustable output voltage from 1.225 VPrecision 2% feedback referenceFrequency adjustable to 1 MHzAdjustable undervoltage lockoutRemote shutdownThermal shutdownCreate a custom design using the LM25018 with theWEBENCH Power Designer

Description

The LM25018 device is a 48-V, 325-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25018 device requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers. A peak current-limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout. The LM25018 device is available in WSON-8 and SO Power PAD-8 plastic packages. The LM25018 device is a 48-V, 325-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25018 device requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers. A peak current-limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout. The LM25018 device is available in WSON-8 and SO Power PAD-8 plastic packages.