Analog Devices LTC3129-1

Overview

Topology	Buck Converter
Input voltage	1.92-15 V
Switching frequency	1000-1400 kHz
Output 1	15 V / 0.2 A
IC revision	C

Description

The LTC®3129-1 is a high efficiency, 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control(MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic panels.

The LTC3129-1 employs an ultralow noise, 1.2MHz PWM switching architecture that minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Built-in loop compensation and soft-start simplify the design. For high efficiency operation at lightloads, automatic Burst Mode operation can be selected, reducing the quiescent current to just 1.3µA. To further reduce part count and improve light load efficiency, the LTC3129-1 includes an internal voltage divider to provide eight selectable fixed output voltages.

Additional features include a power good output, less than 10nA of shutdown current and thermal shutdown.

The LTC3129-1 is available in thermally enhanced 3mm × 3mm QFN and 16-lead MSOP packages. For an adjustable output voltage, see the functionally equivalent LTC3129.

Features

Regulates VOUT Above, Below or Equal to VIN
Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up (Bootstrapped)
Fixed Output Voltage with Eight User-Selectable Settings from 2.5V to 15V
200mA Output Current in Buck Mode
Single Inductor
1.3µA Quiescent Current
Programmable Maximum Power Point Control
1.2MHz Ultralow Noise PWM
Current Mode Control
Pin Selectable Burst Mode® Operation
Up to 95% Efficiency
Accurate RUN Pin Threshold
Power Good Indicator
10nA Shutdown Current
Thermally Enhanced 3mm × 3mm QFN and 16-Lead MSOP Packages

Typical applications

Intrinsically Safe Power Supplies
Avionics-Grade Wireless Headsets
Industrial Wireless Sensor Nodes
Wireless Microphones
Solar Panel Post-Regulator/Charger
Post-Regulator for Harvested Energy

More information

Products

Order Code	Datasheet	Downloads	Product series	L (µH)	I_R (A)	I_SAT (A)	f_res (MHz)	Mount
744029003	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2813 (rev1).igs \| 1.3 MB STP WE-TPC_2813 (rev1).stp \| 534.9 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	3.3	1.25	0.95	70	SMT
744025003	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2828 (rev1).igs \| 891.5 KB STP WE-TPC_2828 (rev1).stp \| 355 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	3.3	1.5	1.8	100	SMT
744029004	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2813 (rev1).igs \| 1.3 MB STP WE-TPC_2813 (rev1).stp \| 534.9 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	4.7	1	0.8	65	SMT
744025004	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2828 (rev1).igs \| 891.5 KB STP WE-TPC_2828 (rev1).stp \| 355 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	4.7	1.35	1.7	84	SMT
744031004	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_3816 (rev1).igs \| 1.5 MB STP WE-TPC_3816 (rev1).stp \| 529.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	4.7	1.2	0.9	75	SMT
744029006	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2813 (rev1).igs \| 1.3 MB STP WE-TPC_2813 (rev1).stp \| 534.9 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	6.8	0.82	0.65	55	SMT
744025006	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2828 (rev1).igs \| 891.5 KB STP WE-TPC_2828 (rev1).stp \| 355 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	6.8	1.1	1.3	59	SMT
744031006	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_3816 (rev1).igs \| 1.5 MB STP WE-TPC_3816 (rev1).stp \| 529.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	6.8	0.85	0.75	45	SMT
744029100	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2813 (rev1).igs \| 1.3 MB STP WE-TPC_2813 (rev1).stp \| 534.9 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	10	0.65	0.5	40	SMT
744025100	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_2828 (rev1).igs \| 891.5 KB STP WE-TPC_2828 (rev1).stp \| 355 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	10	1	1.1	41	SMT
744031100	SPEC	8 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB CAD files ZIP IGS WE-TPC_3816 (rev1).igs \| 1.5 MB STP WE-TPC_3816 (rev1).stp \| 529.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev23a).mod \| 53.2 KB Download all 8 files as zip archive ZIP	WE-TPC SMT Tiny Power Inductor	10	0.74	0.56	45	SMT

	Order Code	Datasheet	Simulation
	744029003	SPEC
	744025003	SPEC
	744029004	SPEC
	744025004	SPEC
	744031004	SPEC
	744029006	SPEC
	744025006	SPEC
	744031006	SPEC
	744029100	SPEC
	744025100	SPEC
	744031100	SPEC

Samples

	Order Code	Datasheet	Simulation	Downloads	Product series	L (µH)	I_R (A)	I_SAT (A)	f_res (MHz)	Mount	Samples

IC manufacturers (96)

15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3µA Quiescent Current