LTC3128IFE#PBF

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Analog Devices Inc./Maxim Integrated

3A MONOLITHIC BUCK-BOOST SUPERCAPACITOR CHARGER AND BALANCER WITH ACCURATE INPUT CURRENT LIMIT

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LTC3128IFE#PBF

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Analog Devices Inc./Maxim Integrated

3A MONOLITHIC BUCK-BOOST SUPERCAPACITOR CHARGER AND BALANCER WITH ACCURATE INPUT CURRENT LIMIT

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3128 Series

The LTC3128 is a highly efficient, buck-boost DC/DC supercapacitor charger. It operates efficiently from input voltages above, below or equal to the output voltage. The LTC3128 incorporates accurate programmable average input current limit, active charge balancing and programmable maximum capacitor voltage. This combination of features makes the LTC3128 ideal for safely charging and protecting large capacitors in backup power systems. The input current limit and maximum capacitor voltage are each programmed using a single resistor. Average input current is accurately controlled over a 0.5A to 3A programmable range while the individual maximum capacitor voltage can be set from 1.8V to 3.0V.Other features of the LTC3128 include <2μA quiescent current from VOUTin Burst Mode®operation, accurate power-good and power failure indicators, and thermal overload protection. The LTC3128 is offered in low profile, thermally enhanced 20-Lead 4mm × 5mm × 0.75mm QFN and 24-Lead TSSOP packages.ApplicationsSupercapacitor Based Backup PowerMemory BackupServers, RAID, RF SystemsIndustrial, Communications, Computing

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3128IFE#PBF

Current - Output	3 A
Frequency - Switching	1.2 MHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package Features	Exposed Pad
Package Length	0.173 in
Package Name	24-TSSOP
Package Width	4.4 mm
Synchronous Rectifier	Yes
Topology	Buck-Boost
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	1.73 V
Voltage - Output (Max)	5.5 V
Voltage - Output (Min/Fixed)	1.8 V

LTC3128 Series

Part	Current - Output	Number of Outputs	Voltage - Output (Max)	Synchronous Rectifier	Function	Voltage - Output (Min/Fixed)	Voltage - Input (Max)	Output Configuration	Package Name	Output Type	Topology	Voltage - Input (Min)	Package Length	Package Features	Package Width	Operating Temperature (Max)	Operating Temperature (Min)	Frequency - Switching	Mounting Type	Package / Case
Analog Devices Inc./Maxim Integrated LTC3128IFE#TRPBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	24-TSSOP	Adjustable	Buck-Boost	1.73 V	0.173 in	Exposed Pad	4.4 mm	125 °C	-40 °C	1.2 MHz	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3128EUFD#PBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	20-QFN	Adjustable	Buck-Boost	1.73 V	4 mm		5 mm	125 °C	-40 °C	1.2 MHz	Surface Mount	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3128IUFD#PBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	20-QFN	Adjustable	Buck-Boost	1.73 V	4 mm		5 mm	125 °C	-40 °C	1.2 MHz	Surface Mount	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3128IUFD#TRPBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	20-QFN	Adjustable	Buck-Boost	1.73 V	4 mm		5 mm	125 °C	-40 °C	1.2 MHz	Surface Mount	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3128EFE#TRPBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	24-TSSOP	Adjustable	Buck-Boost	1.73 V	0.173 in	Exposed Pad	4.4 mm	125 °C	-40 °C	1.2 MHz	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3128EFE#PBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	24-TSSOP	Adjustable	Buck-Boost	1.73 V	0.173 in	Exposed Pad	4.4 mm	125 °C	-40 °C	1.2 MHz	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3128EUFD#TRPBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	20-QFN	Adjustable	Buck-Boost	1.73 V	4 mm		5 mm	125 °C	-40 °C	1.2 MHz	Surface Mount	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3128EFE	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	20-QFN	Adjustable	Buck-Boost	1.73 V	3 mm		3 mm	125 °C	-40 °C	1.2 MHz	Surface Mount	20-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3128IFE#PBF	3 A	1	5.5 V	Yes	Step-Down Step-Up	1.8 V	5.5 V	Positive	24-TSSOP	Adjustable	Buck-Boost	1.73 V	0.173 in	Exposed Pad	4.4 mm	125 °C	-40 °C	1.2 MHz	Surface Mount

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3128IFE#PBF | Datasheet

R540 Reliability Data