Analog Devices LTC3335

Overview

Topology

Buck-Boost Converter

Description

The LTC®3335 is a high efficiency, low quiescent current (680nA) buck-boost DC/DC converter with an integrated precision coulomb counter which monitors accumulated battery discharge in long life battery powered applications.The buck-boost can operate down to 1.8V on its input and provides eight pin-selectable output voltages with up to 50mA of output current.The coulomb counter stores the accumulated battery discharge in an internal register accessible via an I2C interface.The LTC3335 features a programmable discharge alarm threshold. When the threshold is reached, an interrupt is generated at the IRQ pin.To accommodate a wide range of battery types and sizes, the peak input current can be selected from as low as 5mA to as high as 250mA and the full-scale coulomb counter has a programmable range of 32,768:1.The LTC3335 is available in a 3mm × 4mm QFN-20 package.

Features

680nA Input Quiescent Current (Output in Regulation at No Load)
1.8V to 5.5V Input Operating Range
Selectable Output Voltages of 1.8V, 2.5V, 2.8V,3V, 3.3V, 3.6V, 4.5V, 5V
Integrated Coulomb Counter Measures Accumulated Battery Discharge
±5% Battery Discharge Measurement Accuracy
Programmable Peak Input Current o f 5mA, 10mA, 15mA, 25mA, 50mA, 100mA, 150mA, 250mA
Up to 50mA of Output Current
Up to 90% Efficiency
Programmable Coulomb Counter Prescaler for Wide Range of Battery Sizes
Programmable Discharge Alarm Threshold I2C Interface
Low Profile (0.75mm) 20-Lead (3mm × 4mm) QFN Package

REMARKS:-REFERTable 9.Recommended Inductors for the LTC3335PAGE NO 20

Typical applications

Remote Monitors
Long Lifetime Primary Cell Battery Applications
Wireless Sensors
Dust Networks® SmartMesh® Applications

More information

Products

Order Code	Datasheet	Simulation	Downloads	Status	Product series	L(µH)	I_R(A)	I_SAT(A)	f_res(MHz)	Mount	I_RP,40K(A)	R_{DC max.}(mΩ)	Size	Version
744043470	WE-TPC SMT Tiny Power Inductor, 47 µH, 0.75 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB KIC KiCad_WE-TPC (rev25b).zip \| 3.9 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CAD files ZIP IGS WE-TPC_4828 (rev1).igs \| 1.5 MB STP WE-TPC_4828 (rev1).stp \| 577.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev24a).mod \| 52.7 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-TPC SMT Tiny Power Inductor	Inductance47 µH	Rated Current0.75 A	Saturation Current0.5 A	Self Resonant Frequency10 MHz	MountSMT	–	DC Resistance280 mΩ	Size4828	VersionSMT
744043680	WE-TPC SMT Tiny Power Inductor, 68 µH, 0.63 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB KIC KiCad_WE-TPC (rev25b).zip \| 3.9 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CAD files ZIP IGS WE-TPC_4828 (rev1).igs \| 1.5 MB STP WE-TPC_4828 (rev1).stp \| 577.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev24a).mod \| 52.7 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-TPC SMT Tiny Power Inductor	Inductance68 µH	Rated Current0.63 A	Saturation Current0.4 A	Self Resonant Frequency13 MHz	MountSMT	–	DC Resistance400 mΩ	Size4828	–
744043101	WE-TPC SMT Tiny Power Inductor, 100 µH, 0.51 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB KIC KiCad_WE-TPC (rev25b).zip \| 3.9 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CAD files ZIP IGS WE-TPC_4828 (rev1).igs \| 1.5 MB STP WE-TPC_4828 (rev1).stp \| 577.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev24a).mod \| 52.7 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-TPC SMT Tiny Power Inductor	Inductance100 µH	Rated Current0.51 A	Saturation Current0.29 A	Self Resonant Frequency11 MHz	MountSMT	–	DC Resistance600 mΩ	Size4828	–
744043221	WE-TPC SMT Tiny Power Inductor, 220 µH, 0.34 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB KIC KiCad_WE-TPC (rev25b).zip \| 3.9 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CAD files ZIP IGS WE-TPC_4828 (rev1).igs \| 1.5 MB STP WE-TPC_4828 (rev1).stp \| 577.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev24a).mod \| 52.7 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-TPC SMT Tiny Power Inductor	Inductance220 µH	Rated Current0.34 A	Saturation Current0.2 A	Self Resonant Frequency6 MHz	MountSMT	–	DC Resistance1250 mΩ	Size4828	–
744043471	WE-TPC SMT Tiny Power Inductor, 470 µH, 0.24 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB KIC KiCad_WE-TPC (rev25b).zip \| 3.9 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CAD files ZIP IGS WE-TPC_4828 (rev1).igs \| 1.5 MB STP WE-TPC_4828 (rev1).stp \| 577.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev24a).mod \| 52.7 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-TPC SMT Tiny Power Inductor	Inductance470 µH	Rated Current0.24 A	Saturation Current0.125 A	Self Resonant Frequency3 MHz	MountSMT	–	DC Resistance2600 mΩ	Size4828	–
74477826	WE-PD SMT Power Inductor, 680 µH, 0.22 A	Simulation	Downloads10 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 3D Download_3D_WE-PD_7332 (rev1).pdf \| 221.3 KB IGS Download_IGS_WE-PD_7332 (rev1).igs \| 2.2 MB STP Download_STP_WE-PD_7332 (rev1).stp \| 463.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 10 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance680 µH	Rated Current0.22 A	Saturation Current0.22 A	Self Resonant Frequency3.4 MHz	MountSMT	Performance Rated Current0.31 A	DC Resistance5730 mΩ	Size7332	VersionStandard
744043102	WE-TPC SMT Tiny Power Inductor, 1000 µH, 0.14 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-TPC (rev23a).IntLib \| 1.5 MB CDS Cadence_WE-TPC (rev23a).zip \| 10.8 MB EAG Eagle_WE-TPC (rev23b).lbr \| 219.3 KB KIC KiCad_WE-TPC (rev25b).zip \| 3.9 MB ZUK Download_CadStar_WE-TPC (rev19a).zip \| 47.5 KB CAD files ZIP IGS WE-TPC_4828 (rev1).igs \| 1.5 MB STP WE-TPC_4828 (rev1).stp \| 577.2 KB Electric models ZIP PSP PSpice_WE-TPC (rev23a).zip \| 39.9 KB SCS Spectre_WE-TPC (rev24a).mod \| 52.7 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-TPC SMT Tiny Power Inductor	Inductance1000 µH	Rated Current0.14 A	Saturation Current0.08 A	Self Resonant Frequency2.3 MHz	MountSMT	–	DC Resistance7000 mΩ	Size4828	–
768776322	WE-PD2 HV SMT Power Inductor (High Voltage), 2200 µH, 0.18 A	Simulation–	Downloads9 files EDA models: Components ZIP ALT WE-PD2HV (rev25a).IntLib \| 288 KB CDS Cadence_WE-PD2 HV (rev25a).zip \| 2.3 MB EAG Eagle_WE-PD2-HV (rev19a).lbr \| 36.1 KB KIC KiCad_WE-PD2HV (rev25b).zip \| 371.5 KB ZUK Download_CadStar_WE-PD2-HV (rev19a).zip \| 8.2 KB CAD files ZIP IGS WE-PD2_HV_1060 (rev1).igs \| 1.3 MB STP WE-PD2_HV_1060 (rev1).stp \| 638.9 KB Electric models ZIP PSP PSpice_WE-PD2-HV (rev24a).zip \| 5 KB SCS Spectre_WE-PD2_HV (rev24a).mod \| 3.3 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD2 HV SMT Power Inductor (High Voltage)	Inductance2200 µH	Rated Current0.18 A	Saturation Current0.26 A	Self Resonant Frequency1.3 MHz	MountSMT	–	DC Resistance5300 mΩ	Size1054	–

IC manufacturers (103)

Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter