Analog Devices LT3575

Overview

Topology	Flyback Converter
Input voltage	3-40 V
Output 1	12 V / 0.8 A
Output 2	5 V / 1 A
Output 3	12 V / 0.3 A
Output 4	12 V / 0.5 A
Output 5	5 V / 2 A
Output 6	3.3 V / 1.5 A

Description

The LT3575 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or optoisolator is required for regulation. The part senses the isolated output voltage directly from the primary side flyback waveform. A 2.5A, 60V NPN power switch is integrated along with all control logic into a 16-lead TSSOP package.

The LT3575 operates with input supply voltages from 3V to 40V, and can deliver output power up to 14W with no external power switch.The LT3575 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation.

The output voltage is easily set with two external resistors and the transformer turns ratio. Off the shelf transformers are available for many applications.

Features

3V to 40V Input Voltage Range
2.5A, 60V Integrated NPN Power Switch
Boundary Mode Operation
No Transformer Third Winding orOptoisolator Required for Regulation
Improved Primary-Side Winding Feedback Load Regulation
VOUT Set with Two External Resistors
BIAS Pin for Internal Bias Supply and Power NPN Driver
Programmable Soft-Start
Programmable Power Switch Current Limit
Thermally Enhanced 16-Lead TSSOP

Remarks:

See page num 11 for more inductor values.

Typical applications

Medical Isolated Power Supplies
Automotive
Industrial

More information

Products

Order Code	Datasheet	Simulation	Downloads	Product series	Pins	Application	PCB/Cable/Panel	Modularity	Type	Wire Section	λ_{Dom typ.} (nm)	Emitting Color	λ_{Peak typ.} (nm)	I_{V typ.} (mcd)	V_{F typ.} (V)	Chip Technology	2θ_{50% typ.} (°)	Interface Type	Gender	Mount	Working Voltage (V (AC))	Packaging	V_IN	V_Out1 (V)	I_Out1 (A)	V_aux (V)	L (µH)	n	I_R (A)	I_SAT (A)	L_S (µH)	V_T (V (AC))	Size	IC Reference
691102710002	SPEC	–	6 files EDA models: Components ZIP ALT Altium_WR-TBL (rev23f).IntLib \| 168.8 MB CDS Cadence_WR-TBL (rev23h).zip \| 338.1 MB EAG Eagle_WR-TBL Wire Protector (rev22a).lbr \| 845.2 KB CAD files ZIP 3D 3D_691102710002 (rev1).pdf \| 165.6 KB IGS Download_IGES_691102710002 (rev1).iges \| 956.7 KB STP Download_STP_691102710002 (rev1).stp \| 206.5 KB	WR-TBL Series 102 - 5.00 mm Horizontal Entry Modular	2	Wire Protector	PCB	Yes	Horizontal	22 to 14 (AWG) 0.75 to 1.5 (mm²)	–	–	–	–	–	–	–	–	–	THT	250	Box	–	–	–	–	–	–	–	–	–	–	–	–
692622030100	SPEC	–	6 files EDA models: Components ZIP ALT Altium_WR-USB (rev24a).IntLib \| 12.1 MB CDS Cadence_WR-COM_USB (rev24b).zip \| 61.5 MB EAG Eagle_WR-USB (rev24a).lbr \| 448.2 KB CAD files ZIP 3D 3D_692622030100 (rev1).pdf \| 234.1 KB IGS Download_IGS_692622030100 (rev1).igs \| 3.5 MB STP Download_STP_692622030100 (rev1).stp \| 1.3 MB Download all 6 files as zip archive ZIP	WR-COM Micro USB 3.0 Type B Horizontal SMT	10	Micro USB 3.0	–	–	Horizontal	–	–	–	–	–	–	–	–	Type B	Receptacle	SMT	30	Tape and Reel	–	–	–	–	–	–	1.8	–	–	–	–	–
750310562	SPEC		7 files EDA models: Components ZIP ALT Altium_WE-FB (rev23a).IntLib \| 1.3 MB ZUK Download_Cadstar_WE-FB (rev19a).zip \| 27.6 KB CDS Cadence_WE-FB (rev22a).zip \| 5.2 MB EAG Eagle_WE-FB (rev19a).lbr \| 161.7 KB CAD files ZIP IGS 750310562 (rev1).igs \| 1.5 MB STP 750310562 (rev1).stp \| 413.1 KB Electric models ZIP PSP PSpice_WE-FB (rev22b).zip \| 25.7 KB Download all 7 files as zip archive ZIP	WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	18 - 30 V (DC)	12	0.8	12	25	2:1:1	–	2.8	0.5	1500	EP10	LT3573 & LT3575
750310563	SPEC		7 files EDA models: Components ZIP ALT Altium_WE-FB (rev23a).IntLib \| 1.3 MB ZUK Download_Cadstar_WE-FB (rev19a).zip \| 27.6 KB CDS Cadence_WE-FB (rev22a).zip \| 5.2 MB EAG Eagle_WE-FB (rev19a).lbr \| 161.7 KB CAD files ZIP IGS 750310563 (rev1).igs \| 1.5 MB STP 750310563 (rev1).stp \| 413.1 KB Electric models ZIP PSP PSpice_WE-FB (rev22b).zip \| 25.7 KB Download all 7 files as zip archive ZIP	WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	18 - 30 V (DC)	12	0.8	6	25	1:1:0.5	–	2.8	0.5	1500	EP10	LT3573 & LT3575
750310471	SPEC		7 files EDA models: Components ZIP ALT Altium_WE-FB (rev23a).IntLib \| 1.3 MB ZUK Download_Cadstar_WE-FB (rev19a).zip \| 27.6 KB CDS Cadence_WE-FB (rev22a).zip \| 5.2 MB EAG Eagle_WE-FB (rev19a).lbr \| 161.7 KB CAD files ZIP IGS 750310471 (rev1).igs \| 1.5 MB STP 750310471 (rev1).stp \| 413.1 KB Electric models ZIP PSP PSpice_WE-FB (rev22b).zip \| 25.7 KB Download all 7 files as zip archive ZIP	WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	9 - 30 V (DC)	5	2	5	25	3:1:1	–	2.6	0.43	1500	EP10	LT3573 & LT3575
750311675	SPEC		7 files EDA models: Components ZIP ALT Altium_WE-FB (rev23a).IntLib \| 1.3 MB ZUK Download_Cadstar_WE-FB (rev19a).zip \| 27.6 KB CDS Cadence_WE-FB (rev22a).zip \| 5.2 MB EAG Eagle_WE-FB (rev19a).lbr \| 161.7 KB CAD files ZIP IGS 750311675 (rev1).igs \| 1.5 MB STP 750311675 (rev1).stp \| 413.1 KB Electric models ZIP PSP PSpice_WE-FB (rev22b).zip \| 25.7 KB Download all 7 files as zip archive ZIP	WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	9 - 30 V (DC)	5	2	5	25	3:1:1	–	2.5	0.25	1500	EP10	LT3573 & LT3575 & LT3748
150060BS75000	SPEC		25 files EDA models: Components ZIP ALT Altium_WL-SMCW (rev22d).IntLib \| 741.5 KB CDS Cadence_WL-SMCW (rev24a).zip \| 996.7 KB EAG Eagle_WL-SMCW (rev22c).lbr \| 64.2 KB CAD files ZIP IGS IGS_150060xS75000 (rev1).igs \| 314.9 KB STP STP_150060xS75000 (rev1).stp \| 135.1 KB Electric models ZIP PSP PSpice_WL-SMCW (rev22b).zip \| 9.8 KB RAY files RIR Photopia_rir_150060BS75000_5M (rev1p0).zip \| 120.7 MB SRC Lucaray-maker_src_150060BS75000_5M (rev1p0).zip \| 120.7 MB ASA ASAP-and-APEX_dis_150060BS75000_5M (rev1p0).zip \| 120.7 MB COD CodeV_ray_150060BS75000_5M (rev1p0).zip \| 120.7 MB FRE Fred_dat_150060BS75000_5M (rev1p0).zip \| 120.7 MB FRE Fred_txt_150060BS75000_5M (rev1p0).zip \| 189.6 MB LIG LightTools_ray_150060BS75000_5M (rev1p0).zip \| 120.7 MB LIG LightTools_txt_150060BS75000_5M (rev1p0).zip \| 189.6 MB LUC LucidShape_ray_150060BS75000_5M (rev1p0).zip \| 120.7 MB LUC LucidShape_txt_150060BS75000_5M (rev1p0).zip \| 189.6 MB OPT optalix_DIS_150060BS75000_5M (rev1p0).zip \| 120.7 MB OPT OpTaliX_txt_150060BS75000_5M (rev1p0).zip \| 189.6 MB OPT OptiCAD_dat_150060BS75000_5M (rev1p0).zip \| 120.7 MB OPT OptiCAD_txt_150060BS75000_5M (rev1p0).zip \| 189.6 MB SIM Simulux_ray_150060BS75000_5M (rev1p0).zip \| 120.7 MB SPE Speos_ray_150060BS75000_5M (rev1p0).zip \| 125.5 MB TRA TracePro_txt_150060BS75000_5M (rev1p0).zip \| 189.6 MB ZEM Zemax_dat_150060BS75000_5M (rev1p0).zip \| 189.6 MB ZEM ZemaxBin_dat_150060BS75000_5M (rev1p0).zip \| 120.7 MB	WL-SMCW SMT Mono-color Chip LED Waterclear	–	–	–	–	–	–	470	Blue	465	145	3.2	InGaN	140	–	–	SMT	–	Tape and Reel	–	–	–	–	–	–	–	–	–	–	0603	–

Order Code	Datasheet	Simulation
691102710002	SPEC	–
692622030100	SPEC	–
750310562	SPEC
750310563	SPEC
750310471	SPEC
750311675	SPEC
150060BS75000	SPEC

Samples

	Order Code	Datasheet	Simulation	Downloads	Product series	Pins	Application	PCB/Cable/Panel	Modularity	Type	Wire Section	λ_{Dom typ.} (nm)	Emitting Color	λ_{Peak typ.} (nm)	I_{V typ.} (mcd)	V_{F typ.} (V)	Chip Technology	2θ_{50% typ.} (°)	Interface Type	Gender	Mount	Working Voltage (V (AC))	Packaging	V_IN	V_Out1 (V)	I_Out1 (A)	V_aux (V)	L (µH)	n	I_R (A)	I_SAT (A)	L_S (µH)	V_T (V (AC))	Size	IC Reference	Samples

IC manufacturers (96)

Isolated Flyback Converter without an Opto-Coupler

Overview

Description

Features

Typical applications

More information

Products

EDA models: Components
ZIP

CAD files
ZIP

EDA models: Components
ZIP

CAD files
ZIP

Download all 6 files as zip archive
ZIP

EDA models: Components
ZIP

CAD files
ZIP

Electric models
ZIP

Download all 7 files as zip archive
ZIP

EDA models: Components
ZIP

CAD files
ZIP

Electric models
ZIP

Download all 7 files as zip archive
ZIP

EDA models: Components
ZIP

CAD files
ZIP

Electric models
ZIP

Download all 7 files as zip archive
ZIP

EDA models: Components
ZIP

CAD files
ZIP

Electric models
ZIP

Download all 7 files as zip archive
ZIP

EDA models: Components
ZIP

CAD files
ZIP

Electric models
ZIP

RAY files

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