Analog Devices LTC3124

Overview

Topology	Boost Converter
Input voltage	1.8-5.5 V
Switching frequency	100-3000 kHz
Output 1	15 V / 5 A

Description

The LTC®3124 is a dual-phase, synchronous step-up DC/ DC converter with true output disconnect and inrush current limiting capable of providing output voltages up to 15V. Dual-phase operation significantly reduces peakinductor and capacitor ripple currents, minimizing inductor and capacitor size. The 2.5A per phase current limit, along with the ability to program output voltages up to 15V make the LTC3124 well suited for a variety of demanding applications. Once started, operation will continue withinputs down to 500mV.The LTC3124 switching frequency can be programmed from 100kHz to 3MHz to optimize applications for highest efficiency or smallest solution footprint. The oscillator can be synchronized to an external clock for noise sensitiveapplications. Selectable Burst Mode operation reduces quiescent current to 25μA, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up. Other features include a <1μA shutdown current and robust protection under short-circuit, thermal overload, and output overvoltage conditions. The LTC3124 is offered in both16-lead DFN and thermally-enhanced TSSOP packages.

Features

VIN Range: 1.8V to 5.5V, 500mV After Start-Up
Adjustable Output Voltage: 2.5V to 15V
1.5A Output Current for VIN = 5V and VOUT = 12V
Dual-Phase Control Reduces Output Voltage Ripple
Output Disconnects from Input When Shut Down
Synchronous Rectification: Up to 95% Efficiency
Inrush Current Limit
Up to 3MHz Programmable Switching FrequencySynchronizable to External Clock
Selectable Burst Mode® Operation: 25μA IQ
Output Overvoltage Protection
Internal Soft-Start
<1μA IQ in Shutdown
16-Lead, Thermally- Enhanced 3mm × 5mm ×0.75mm DFN and TSSOP Packages

Typical applications

Small DC Motors, Thermal Printers
RF, Microwave Power Amplifiers
Piezo Actuators
12V Analog Rail from Battery, 5V, or Backup Capacitor

More information

Products

Order Code	Datasheet	Simulation	Downloads	Status	Product series	L(µH)	I_RP,40K(A)	R_{DC max.}(mΩ)	f_res(MHz)	Size	Version	I_SAT,10%(A)	I_SAT,30%(A)	R_DC(mΩ)	Material	Mount	I_R,40K(A)
74437324010	WE-LHMI SMT Power Inductor, 1 µH, 6.2 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-LHMI (rev25c).IntLib \| 1.8 MB CDS Cadence_WE-LHMI (rev25a).zip \| 4.5 MB EAG Eagle_WE-LHMI (rev24c).lbr \| 193.1 KB KIC KiCad_WE-LHMI (rev25b).zip \| 991.6 KB ZUK Download_CadStar_WE-LHMI (rev19a).zip \| 16.7 KB CAD files ZIP IGS WE-LHMI_4020 (rev1).igs \| 943.7 KB STP WE-LHMI_4020 (rev1).stp \| 377.6 KB Electric models ZIP PSP PSpice_WE-LHMI (rev24b).zip \| 33.5 KB SCS Spectre_WE-LHMI (rev24a).mod \| 43.1 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-LHMI SMT Power Inductor	Inductance1 µH	Performance Rated Current6.2 A	DC Resistance27 mΩ	Self Resonant Frequency89 MHz	Size4020	–	Saturation Current @ 10%6.5 A	Saturation Current @ 30%12.5 A	–	–	MountSMT	Rated Current5 A
7447789002	WE-PD SMT Power Inductor, 2.2 µH, 5.6 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_7732R_IGS (rev1).igs \| 2.4 MB STP Download_WE-PD_7332R_STP (rev1).stp \| 1.4 MB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance2.2 µH	Performance Rated Current5.6 A	DC Resistance23 mΩ	Self Resonant Frequency67 MHz	Size7332	VersionRobust	Saturation Current @ 10%4.8 A	Saturation Current @ 30%6 A	–	–	MountSMT	Rated Current4.02 A
7447779002	WE-PD SMT Power Inductor, 2.2 µH, 6.2 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_7345R_IGS (rev1).igs \| 2.5 MB STP Download_WE-PD_7345R_STP (rev1).stp \| 752.5 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance2.2 µH	Performance Rated Current6.2 A	DC Resistance20 mΩ	Self Resonant Frequency60 MHz	Size7345	VersionRobust	Saturation Current @ 10%6 A	Saturation Current @ 30%7.4 A	–	–	MountSMT	Rated Current4.2 A
7447789003	WE-PD SMT Power Inductor, 3.3 µH, 4.9 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_7732R_IGS (rev1).igs \| 2.4 MB STP Download_WE-PD_7332R_STP (rev1).stp \| 1.4 MB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance3.3 µH	Performance Rated Current4.9 A	DC Resistance30 mΩ	Self Resonant Frequency61 MHz	Size7332	VersionRobust	Saturation Current @ 10%4.2 A	Saturation Current @ 30%5.1 A	–	–	MountSMT	Rated Current3.42 A
7447789004	WE-PD SMT Power Inductor, 4.7 µH, 4.2 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_7732R_IGS (rev1).igs \| 2.4 MB STP Download_WE-PD_7332R_STP (rev1).stp \| 1.4 MB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance4.7 µH	Performance Rated Current4.2 A	DC Resistance35 mΩ	Self Resonant Frequency45 MHz	Size7332	VersionRobust	Saturation Current @ 10%3.9 A	Saturation Current @ 30%5.3 A	–	–	MountSMT	Rated Current2.9 A
7443251000	WE-HCI SMT Flat Wire High Current Inductor, 10 µH, 9.5 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-HCI (rev25a).IntLib \| 1.1 MB CDS Cadence_WE-HCI (rev25a).zip \| 11.8 MB EAG Eagle_WE-HCI (rev25a).lbr \| 140.6 KB KIC KiCad_WE-HCI (rev25b).zip \| 2.7 MB ZUK Download_CadStar_WE-HCI (rev19a).zip \| 15.7 KB CAD files ZIP IGS WE-HCI_1050_744325 (rev1).igs \| 1.9 MB STP WE-HCI_1050_744325 (rev1).stp \| 602.1 KB Electric models ZIP PSP PSpice_WE-HCI (rev22a).zip \| 22.1 KB SCS Spectre_WE-HCI (rev24a).mod \| 26.8 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-HCI SMT Flat Wire High Current Inductor	Inductance10 µH	Performance Rated Current9.5 A	DC Resistance17.93 mΩ	Self Resonant Frequency21 MHz	Size1050	VersionSMT	Saturation Current @ 10%4 A	Saturation Current @ 30%8.5 A	DC Resistance16.3 mΩ	MaterialSuperflux	MountSMT	–
744770122	WE-PD SMT Power Inductor, 22 µH, 5.8 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1280_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1280_STP (rev1).stp \| 752.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance22 µH	Performance Rated Current5.8 A	DC Resistance35 mΩ	Self Resonant Frequency12 MHz	Size1280	VersionStandard	Saturation Current @ 10%5 A	Saturation Current @ 30%6.5 A	–	–	MountSMT	Rated Current4.6 A
744770133	WE-PD SMT Power Inductor, 33 µH, 4.7 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1280_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1280_STP (rev1).stp \| 752.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance33 µH	Performance Rated Current4.7 A	DC Resistance53 mΩ	Self Resonant Frequency8.5 MHz	Size1280	VersionStandard	Saturation Current @ 10%3.9 A	Saturation Current @ 30%5.05 A	–	–	MountSMT	Rated Current3.6 A
7447709470	WE-PD SMT Power Inductor, 47 µH, 4.9 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1210_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1210_STP (rev1).stp \| 754.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance47 µH	Performance Rated Current4.9 A	DC Resistance60 mΩ	Self Resonant Frequency6.5 MHz	Size1210	VersionStandard	Saturation Current @ 10%4.5 A	Saturation Current @ 30%5.5 A	–	–	MountSMT	Rated Current3.8 A

IC manufacturers (103)

15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect