LTC3126HFE#PBF

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Analog Devices Inc./Maxim Integrated

42V, 2.5A SYNCHRONOUS STEP-DOWN REGULATOR WITH NO-LOSS INPUT POWERPATH

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LTC3126HFE#PBF

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Analog Devices Inc./Maxim Integrated

42V, 2.5A SYNCHRONOUS STEP-DOWN REGULATOR WITH NO-LOSS INPUT POWERPATH

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3126 Series

The LTC3126 is a high efficiency synchronous buck converter with an internal no-loss PowerPath™supporting seamless operation from two separate input power sources. Pin selectable ideal diode-OR and priority input modes with user programmable undervoltage lockout thresholds provide full control over the transition between the input power sources. The fast, automatic switchover provided by the internal PowerPath eliminates the need for hold-up capacitors and minimizes disturbances on the output rail. An active input channel indicator and independent input and output power good signals provide complete feedback of the power system status.A wide 2.4V to 42V input voltage range, 2.5A output current capability and 2μA Burst Mode operation quiescent current facilitate use of the LTC3126 with a wide variety of power sources including supercapacitors, automotive batteries, unregulated wall adapters and single to multicell stacks of most battery chemistries. Additional features include 1μA current in shutdown, internal soft-start and thermal protection. The LTC3126 is available in thermally enhanced 28-lead 4mm × 5mm QFN and 28-lead TSSOP packages.ApplicationsPortable Industrial/Communications Test EquipmentBattery and Supercapacitor Backup PowerAutomotive Power with Battery BackupUninterruptible Power Supplies

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3126HFE#PBF

Current - Output	2.5 A
Frequency - Switching (Max)	2.2 MHz
Frequency - Switching (Min)	200 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package Features	Exposed Pad
Package Length	0.173 in
Package Name	28-TSSOP, 28-TSSOP-EP
Package Width	4.4 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	42 V
Voltage - Input (Min)	2.4 V
Voltage - Output (Max)	42 V
Voltage - Output (Min/Fixed)	0.818 V

LTC3126 Series

Part	Package Width	Package Name	Package Features	Package Length	Mounting Type	Synchronous Rectifier	Frequency - Switching (Max)	Frequency - Switching (Min)	Output Configuration	Number of Outputs	Current - Output	Output Type	Voltage - Output (Min/Fixed)	Voltage - Input (Max)	Function	Voltage - Input (Min)	Voltage - Output (Max)	Topology	Operating Temperature (Max)	Operating Temperature (Min)	Package / Case
Analog Devices Inc./Maxim Integrated LTC3126EFE#TRPBF	4.4 mm	28-TSSOP 28-TSSOP-EP	Exposed Pad	0.173 in	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3126MPFE#PBF	4.4 mm	28-TSSOP 28-TSSOP-EP	Exposed Pad	0.173 in	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	150 °C	-55 °C
Analog Devices Inc./Maxim Integrated LTC3126HFE#PBF	4.4 mm	28-TSSOP 28-TSSOP-EP	Exposed Pad	0.173 in	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	150 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3126IUFD#PBF	5 mm	28-QFN		4 mm	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3126IFE#TRPBF	4.4 mm	28-TSSOP 28-TSSOP-EP	Exposed Pad	0.173 in	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3126EUFD	5 mm	28-QFN		4 mm	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3126EFE#PBF	4.4 mm	28-TSSOP 28-TSSOP-EP	Exposed Pad	0.173 in	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C
Analog Devices Inc./Maxim Integrated LTC3126IUFD#TRPBF	5 mm	28-QFN		4 mm	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3126MPFE#TRPBF	4.4 mm	28-TSSOP 28-TSSOP-EP	Exposed Pad	0.173 in	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	150 °C	-55 °C
Analog Devices Inc./Maxim Integrated LTC3126EUFD#PBF	5 mm	28-QFN		4 mm	Surface Mount	Yes	2.2 MHz	200 kHz	Positive	1	2.5 A	Adjustable	0.818 V	42 V	Step-Down	2.4 V	42 V	Buck	125 °C	-40 °C	28-WFQFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Package Drawing - 28-Lead TSSOP w/ EP

R539 Reliability Data

Datasheet

LTC3126HFE#PBF | Datasheet