SEPIC Regulators
Analog Devices manufacturers a broad range of monolithic boost switching regulators that can be configured as SEPIC converters. These SEPIC converters maintain a fixed output voltage regardless of whether the input voltage is above, or below the input. These converters offer wide input voltage ranges, internal Schottky diodes, and external synchronization. Other features include programmable current limit, burst-mode operation, and low battery detect.
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Design Notes
- SEPIC, Boost, Inverting, and Flyback Controller Solves the Voltage Drop Problem of High Impedance, Long Length Industrial Power Lines
- High Voltage LTC3892 Family of Controllers Reduces DC-to-DC Converter Cost and Size
- DN273 - Fiber Optic Communication Systems Benefit from Tiny, Low Noise Avalanche Photodiode Bias Supply PDF
- DN357 - Tiny, Highly Flexible, Dual Boost/Inverter Tracks Supplies PDF
- DN545 - Monolithic Converter Delivers High Output Voltages PDF
- DN376 - Monolithic Converter Drives High Power LEDs PDF
- DN340 - DC/DC Converter Drives Lumileds White LEDs from a Variety of Power Sources PDF
- DN296 - LTC1871 No RSENSE Controller Is Small and Efficient in Boost, Flyback and SEPIC Applications PDF
- DN271 - Tiny Step-Up/Step-Down Power Supply Delivers 3.3V at 1.3A in Battery-Powered Devices PDF
- DN292 - Very Low Dropout (VLDO) Linear Regulators Supply Low Voltage Outputs PDF
- DN371 - High Efficiency 2-Phase Boost Converter Minimizes Input and Output Current Ripple PDF
- DN365 - ThinSOT Switching Regulator Controls Inrush Current PDF
- DN359 - Dual DC/DC Converter with Integrated Schottkys Generates ±40V Outputs and Consumes Only 40µA Quiescent Current PDF
- DN358 - Compact Step-Up Converter Conserves Battery Power PDF
- DN317 - Boost Regulator Makes Low Profile SEPIC with Both Step-Up and Step-Down Capability PDF
- DN500 - Wide Input Voltage Range Boost/Inverting/SEPIC Controller Works Down to an Input Voltage of 1.6V PDF
- DN1022 - Negative Buck Converter with Short-Circuit Protection and Shutdown PDF
- DN481 - 2-Phase, Dual Output Synchronous Boost Converter Solves Thermal Problems in Harsh Environments PDF
- DN458 - Buck Converter Eases the Task of Designing Auxiliary Low Voltage Negative Rails PDF
- DN453 - 4-Phase Boost Converter Delivers 384W with no Heat Sink PDF
- DN435 - Single Resistor Sets Positive or Negative Output for DC/DC Converter PDF
- DN1009 - Tiny, Efficient High Power LED Camera Flash Solutions for Cell Phone Applications PDF
- DN406 - Versatile High Power LED Driver Controller Simplifies Design PDF
- DN417 - Drive Large TFT-LCD Displays with a Space-Saving Triple-Output Regulator PDF
- DN400 - True Rail-to-Rail, High Input Impedance ADC Simplifies Precision Measurements PDF
Product Selector Card
LT Journal
- 3mm × 3mm Monolithic DC/DC Boost/Inverting Converters with 65V Power Switches PDF
- Jan 2009 - 2-Phase, Non-Synchronous Boost Controller Simplifies Design of High Voltage, High Current Supplies PDF
- June 2009 - Two New Controllers for Boost, Flyback, SEPIC and Inverting DC/DC Converters Accept Inputs up to 100V PDF
- Jan 2008 - Internal 2A, 42V Switch, Adjustable 2.5MHz Operating Frequency and 3mm × 3mm Package Allow Boost Regulator to Fit Numerous Applications PDF
- Mar 2007 - Current Mode Flyback DC/DC Controller Provides Tremendous Design Flexibility PDF
- Oct 2007 - Compact Controller is a Basic Building Block for Wide Array of DC/DC Conversion Solutions PDF
- Sep 2006 Miniscule Step-Up Controller Yields Wide Input and Output Ranges PDF
- Mar 2006 High Voltage Boost/LED Controller Provides 3000:1 PWM Dimming Ratio PDF
- Dec 2005 Constant Current from 3A DC/DC Converter with 2 Rail-to-Rail Current Sense Amplifiers PDF
- Sep 2005 Versatile Controller Simplifies High Voltage DC/DC Converter Designs PDF
- March 2005 - 2A, 40V, SOT-23 Boost Converter Provides High Power in Small Spaces PDF
- August 2004 - 1.1A Boost Provides Soft-Start Capability in Tiny ThinSOT Package PDF
- Sep 2003 Micropower SOT-23 Boost with Integrated Schottky Diode Provides Output Disconnect and Short Circuit Protection PDF
- The LTC1871 Achieves the Industry’s Highest Efficiency for Single-Ended Boost, Flyback and SEPIC Topologies
- Design Once; Use Twice: Monolithic SEPIC/Boost Regulators with Wide VIN Range Satisfy Requirements of Both Consumer and Commercial Vehicles
Application Notes
- AN118 - High Voltage, Low Noise, DC/DC Converters PDF
- AN29 - Some Thoughts on DC-DC Converters PDF
- AN44 - LT1074/LT1076 Design Manual PDF
- AN61 - Practical Circuitry for Measurement and Control Problems PDF
- AN65 - A Fourth Generation of LCD Backlight Technology PDF
- AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing PDF
- AN35 - Step Down Switching Regulators PDF
- AN39 - Parasitic Capacitance Effects in Step-Up Transformer Design PDF
- AN19 - LT1070 Design Manual PDF
- AN30 - Switching Regulator Circuit Collection PDF
- AN49 - Illumination Circuitry for Liquid Crystal Displays PDF
- AN25 - Switching Regulators for Poets: A Gentle Guide for the Trepidatious PDF
- AN85 - Low Noise Varactor Biasing with Switching Regulators: Vanquishing Villainous Vitiators Vis-à-Vis Vital Varactors PDF
- AN84 - Linear Technology Magazine Circuit Collection, Volume IV PDF
- AN81 - Ultracompact LCD Backlight Inverters PDF
- AN67 - Linear Technology Magazine Circuit Collection, Volume III PDF
- AN66 - Linear Technology Magazine Circuit Collection, Volume II PDF
- AN60 - PCMCIA Card and Card Socket Power Management: PDF
- AN59 - Applications of the LT1300 and LT1301 Micropower DC/DC Converters PDF
- AN55 - Techniques for 92% Efficient LCD Illumination PDF
- AN51 - Power Conditioning for Notebook and Palmtop Systems PDF
- AN46 - Efficiency and Power Characteristics of Switching Regulator Circuits PDF
- AN31 - Linear Circuits for Digital Systems PDF
Technical Articles
- Minimizing Emissions of a SEPIC Converter
- The Low Output Voltage Ripple Zeta DC/DC Converter Topology
- Three Bucks Plus a Boost Controller Meet the Stringent Requirements of Wide-Range VIN Automotive Applications
- LT3759 Wide Vin, 48V @ >100mA Output Boost Converter that Works Down to 1.6V
- How NOT to Damage Your Switching Regulator Demo Board
- Differences Between the Ćuk Converter and the Inverting Charge Pump Converter
- Monolithic Converter Delivers High Output Voltages
- Wide Input Voltage Range Boost/Inverting/SEPIC Controller Works Down to an Input Voltage of 1.6V
Videos
- LT3757 2.9V to 40V Boost, SEPIC, Flyback or Inverting Controller
- High-Power Boost/SEPIC/Inverting DC/DC Converters with Fault Protection
- 80V Synchronous SEPIC/Inverting/Boost Controller IC with 3 Regulation Loops
- Simplify your high voltage DC/DC converters to save battery life
- LT8709 Video Product Brief
- LT8471 Video Product Brief
SEPIC Regulators
| SortOrder | Part# | Number of Outputs | Vin (min) (V) | Vin (max) (V) | Switch Current (typ) (A) | Vout Max (typ) (V) | Monolithic | Isupply (typ) (A) | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTC7840 | 2 | 5.5 | 60 | 60 | 60 | No | 3m | $3.20 (LTC7840EFE#PBF) |
| 2 | LT8361 | 1 | 2.8 | 60 | 2 | 100 | Yes | 22µ | $2.06 (LT8361EMSE#PBF) |
| 3 | LT8711 | 1 | 4.5 | 42 | 20 | 42 | No | 15µ | $2.30 (LT8711EUDC#PBF) |
| 4 | LT8362 | 1 | 2.8 | 60 | 2.5 | 60 | Yes | 22µ | $1.85 (LT8362EDD#PBF) |
| 5 | LTC1871X | 1 | 2.5 | 36 | 20 | 72 | No | 250µ | $125.00 (LTC1871XMS#PBF) |
| 6 | LT8603 | 4 | 3 | 42 | 4 | 41.58 | Yes | 28µ | $3.63 (LT8603JUJ#PBF) |
| 7 | LT8364 | 1 | 2.8 | 60 | 5 | 60 | Yes | 9µ | $2.06 (LT8364EDE#PBF) |
| 8 | LTM8049 | 2 | 2.6 | 20 | 1.25 | 24 | Yes | 10m | $14.20 (LTM8049EY#PBF) |
| 9 | LT8335 | 1 | 3 | 25 | 2.5 | 28 | Yes | 5.5µ | $2.50 (LT8335EDDB#TRPBF) |
| 10 | LT8331 | 1 | 4.5 | 100 | 600m | 140 | Yes | 5.5µ | $2.95 (LT8331EMSE#PBF) |
| 11 | LT8494 | 1 | 1 | 32 | 2.55 | 70 | Yes | 3µ | $2.85 (LT8494EFE#PBF) |
| 12 | LT8330 | 1 | 3 | 40 | 1.2 | 60 | Yes | 5.5µ | $2.50 (LT8330EDDB#TRPBF) |
| 13 | LT8570-1 | 1 | 2.55 | 40 | 375m | 65 | Yes | 1.2m | $2.25 (LT8570EMS8E-1#PBF) |
| 14 | LT8570 | 1 | 2.55 | 40 | 750m | 65 | Yes | 1.2m | $2.25 (LT8570EDD#PBF) |
| 15 | LT8495 | 1 | 1 | 60 | 2.55 | 70 | Yes | 9µ | $2.95 (LT8495EFE#PBF) |
| 16 | LT8709 | 1 | -80 | -4.5 | 25 | 80 | No | 4m | $3.65 (LT8709EFE#PBF) |
| 17 | LT8580 | 1 | 2.5 | 40 | 1.5 | 65 | Yes | 1.2m | $2.35 (LT8580EDD#PBF) |
| 18 | LTC3872-1 | 1 | 2.75 | 9.8 | 10 | 60 | No | 250µ | $1.80 (LTC3872EDDB-1#TRPBF) |
| 19 | LT8710 | 1 | 4.5 | 80 | 25 | 80 | No | 4m | $3.41 (LT8710EFE#PBF) |
| 20 | LT8471 | 2 | 2.6 | 50 | 2.55 | 50 | Yes | 2.4m | $3.75 (LT8471EFE#PBF) |
| 21 | LTM8045 | 1 | 2.8 | 18 | 1.26 | 15 | Yes | 10m | $6.97 (LTM8045EY#PBF) |
| 22 | LT3959 | 1 | 1.6 | 40 | 7 | 40 | Yes | 350µ | $3.05 (LT3959EUHE#PBF) |
| 23 | LTC3862-2 | 1 | 5.5 | 36 | 60 | 350 | No | 1.8m | $3.29 (LTC3862EGN-2#PBF) |
| 24 | LT3957A | 1 | 3 | 40 | 5.9 | 40 | Yes | 1.7m | $2.95 (LT3957AEUHE#PBF) |
| 25 | LT8582 | 2 | 2.5 | 22 | 4.3 | 42 | Yes | 2.1m | $3.75 (LT8582EDKD#PBF) |
| 26 | LT3759 | 1 | 1.6 | 42 | 25 | 42 | No | 350µ | $2.35 (LT3759EMSE#PBF) |
| 27 | LT3958 | 1 | 5 | 80 | 4 | 80 | Yes | 1.6m | $3.05 (LT3958EUHE#PBF) |
| 28 | LT3581 | 1 | 2.3 | 22 | 4.3 | 42 | Yes | 1.9m | $2.45 (LT3581EDE#PBF) |
| 29 | LT3579-1 | 1 | 2.5 | 16 | 7.5 | 42 | Yes | 1.9m | $3.30 (LT3579EUFD-1#PBF) |
| 30 | LT3579 | 1 | 2.5 | 16 | 7.5 | 42 | Yes | 1.9m | $3.30 (LT3579EUFD#PBF) |
| 31 | LT3758A | 1 | 5.5 | 100 | 25 | 350 | No | 1.6m | $2.35 (LT3758AEDD#PBF) |
| 32 | ADP1613 | 1 | 2.5 | 5.5 | 2 | 20 | Yes | 1.35m | $0.72 (ADP1613ARMZ-R7) |
| 33 | ADP1612 | 1 | 1.8 | 5.5 | 1.4 | 20 | Yes | 1.35m | $0.80 (ADP1612ARMZ-R7) |
| 34 | LT3757A | 1 | 2.9 | 40 | 25 | 350 | No | 1.6m | $2.06 (LT3757AEDD#PBF) |
| 35 | LTC3862-1 | 1 | 8.5 | 36 | 60 | 350 | No | 1.8m | $3.29 (LTC3862EGN-1#PBF) |
| 36 | LTC3862 | 1 | 4 | 36 | 60 | 60 | No | 1.8m | $3.29 (LTC3862EGN#PBF) |
| 37 | LT3495-1 | 1 | 2.2 | 16 | 350m | 40 | Yes | 60µ | $1.75 (LT3495EDDB-1#TRPBF) |
| 38 | LT3495 | 1 | 2.2 | 16 | 650m | 40 | Yes | 60µ | $1.75 (LT3495BEDDB#TRPBF) |
| 39 | LTC3805-5 | 1 | 4.5 | 75 | 10 | 75 | No | 360µ | $1.39 (LTC3805EDD-5#PBF) |
| 40 | LT3580 | 1 | 2.5 | 32 | 2.5 | 42 | Yes | 1m | $2.00 (LT3580EDD#PBF) |
| 41 | LTC3873-5 | 1 | 4 | 75 | 10 | 60 | No | 300µ | $1.25 (LTC3873EDDB-5#TRPBF) |
| 42 | LTC3873 | 1 | 8.8 | 75 | 10 | 60 | No | 300µ | $1.25 (LTC3873EDDB#TRPBF) |
| 43 | LTC1871-1 | 1 | 2.5 | 36 | 20 | 72 | No | 250µ | $2.65 (LTC1871EMS-1#PBF) |
| 44 | LTC3872 | 1 | 2.75 | 9.8 | 10 | 60 | No | 250µ | $1.80 (LTC3872EDDB#TRPBF) |
| 45 | LT3844 | 1 | 4 | 60 | 5 | 36 | No | 120µ | $3.10 (LT3844EFE#PBF) |
| 46 | LT3489 | 1 | 2.4 | 16 | 3.5 | 40 | Yes | 2m | $1.95 (LT3489EMS8E#PBF) |
| 47 | LTC3805 | 1 | 8.8 | 75 | 10 | 75 | No | 360µ | $1.39 (LTC3805EDD#PBF) |
| 48 | LTC3783 | 1 | 3 | 36 | 25 | 100 | No | 1.5m | $2.85 (LTC3783EDHD#PBF) |
| 49 | LT3477 | 1 | 2.3 | 25 | 4 | 40 | Yes | 5m | $3.15 (LT3477EUF#PBF) |
| 50 | LT3724 | 1 | 4 | 60 | 5 | 36 | No | 1.7m | $3.10 (LT3724EFE#PBF) |
| 51 | LT3479 | 1 | 2.3 | 24 | 4.5 | 42 | Yes | 5m | $3.00 (LT3479EDE#PBF) |
| 52 | ADP1610 | 1 | 2.5 | 5.5 | 2 | 12 | Yes | 600µ | $1.26 (ADP1610ARMZ-R7) |
| 53 | LT3472 | 2 | 2.2 | 16 | 400m | 34 | Yes | 2.8m | $1.95 (LT3472EDD#PBF) |
| 54 | LT3471 | 2 | 2.4 | 16 | 2.05 | 40 | Yes | 2.4m | $2.80 (LT3471EDD#PBF) |
| 55 | LT1935 | 1 | 2.1 | 16 | 3.2 | 38 | Yes | 3m | $2.50 (LT1935ES5#TRPBF) |
| 56 | LT1941 | 3 | 3.3 | 25 | 4.3 | 35.2 | Yes | 2m | $5.25 (LT1941EFE#PBF) |
| 57 | LT3463A | 2 | 2.2 | 15 | 250m | 40 | Yes | 40µ | $1.95 (LT3463AEDD#PBF) |
| 58 | LT3463 | 2 | 2.2 | 15 | 250m | 40 | Yes | 40µ | $1.95 (LT3463EDD#PBF) |
| 59 | LT3461A | 1 | 2.5 | 16 | 420m | 38 | Yes | 2.8m | $1.71 (LT3461AES6#TRPBF) |
| 60 | LT3436 | 1 | 3 | 25 | 4 | 34 | Yes | 900µ | $2.75 (LT3436EFE#PBF) |
| 61 | LT3467A | 1 | 2.2 | 16 | 1.1 | 40 | Yes | 1.2m | $1.81 (LT3467AEDDB#TRPBF) |
| 62 | LT3467 | 1 | 2.2 | 16 | 1.1 | 40 | Yes | 1.2m | $1.81 (LT3467EDDB#TRPBF) |
| 63 | LT3461 | 1 | 2.5 | 16 | 420m | 38 | Yes | 2.8m | $1.71 (LT3461ES6#TRPBF) |
| 64 | LT3460 | 1 | 2.5 | 16 | 420m | 36 | Yes | 2m | $1.56 (LT3460ES5#TRPBF) |
| 65 | LTC1871-7 | 1 | 2.5 | 36 | 20 | 36 | No | 550µ | $2.65 (LTC1871EMS-7#PBF) |
| 66 | LT1961 | 1 | 3 | 25 | 2 | 35 | Yes | 900µ | $1.69 (LT1961EMS8E#PBF) |
| 67 | LT3464 | 1 | 2 | 10 | 80m | 34 | Yes | 25µ | $1.56 (LT3464ETS8#TRPBF) |
| 68 | LTC1872B | 1 | 2.5 | 9.8 | 20 | 36 | No | 270µ | $1.85 (LTC1872BES6#TRPBF) |
| 69 | LTC1871 | 1 | 2.5 | 36 | 20 | 72 | No | 250µ | $2.65 (LTC1871EMS#PBF) |
| 70 | LT1618 | 1 | 1.6 | 18 | 2 | 36 | Yes | 1.8m | $1.75 (LT1618EDD#PBF) |
| 71 | LTC1624 | 1 | 3.5 | 36 | 5 | 34.2 | No | 500µ | $3.50 (LTC1624CS8#PBF) |
| 72 | LTC1872 | 1 | 2.5 | 9.8 | 10 | 36 | No | 270µ | $1.85 (LTC1872ES6#TRPBF) |
| 73 | LT1930A | 1 | 2.45 | 16 | 1.2 | 34 | Yes | 4.2m | $1.96 (LT1930AES5#TRPBF) |
| 74 | LT1930 | 1 | 2.45 | 16 | 1.2 | 34 | Yes | 4.2m | $1.96 (LT1930ES5#TRPBF) |
| 75 | LT1619 | 1 | 1.9 | 18 | 20 | 18 | No | 9m | $1.99 (LT1619ES8#PBF) |
| 76 | LT1615-1 | 1 | 1 | 15 | 100m | 36 | Yes | 20µ | $1.70 (LT1615ES5-1#TRPBF) |
| 77 | LT1615 | 1 | 1.2 | 15 | 350m | 36 | Yes | 20µ | $1.70 (LT1615ES5#TRPBF) |
| 78 | LT1949 | 1 | 1.5 | 12 | 1.13 | 30 | Yes | 4.5m | $2.20 (LT1949ES8#PBF) |
| 79 | LT1308B | 1 | 1 | 10 | 3 | 34 | Yes | 2.5m | $3.25 (LT1308BCS8#PBF) |
| 80 | LT1308A | 1 | 1 | 10 | 3 | 34 | Yes | 140µ | $3.25 (LT1308ACS8#PBF) |
| 81 | LT1613 | 1 | 900m | 10 | 800m | 36 | Yes | 3m | $1.70 (LT1613CS5#TRPBF) |
| 82 | LT1610 | 1 | 900m | 8 | 600m | 30 | Yes | 30µ | $1.65 (LT1610CS8#PBF) |
| 83 | LT1374HV | 1 | 5 | 32 | 6 | 27.52 | Yes | 2.5m | $4.85 (LT1374HVCS8#PBF) |
| 84 | LT1374 | 1 | 5 | 25 | 6 | 21.5 | Yes | 2.5m | $4.40 (LT1374CS8#PBF) |
| 85 | LT1316 | 1 | 1.5 | 12 | 500m | 30 | Yes | 33µ | $2.45 (LT1316CS8#PBF) |
| 86 | LT1370HV | 1 | 2.7 | 30 | 6 | 42 | Yes | 4.5m | $6.85 (LT1370HVCT7#PBF) |
| 87 | LT1370 | 1 | 2.7 | 30 | 6 | 35 | Yes | 4.5m | $6.05 (LT1370CT7#PBF) |
| 88 | LT1317B | 1 | 1.5 | 12 | 800m | 30 | Yes | 4.8m | $2.25 (LT1317BCS8#PBF) |
| 89 | LT1317 | 1 | 1.5 | 12 | 800m | 30 | Yes | 100µ | $2.25 (LT1317CS8#PBF) |
| 90 | LT1307B | 1 | 920m | 12 | 600m | 30 | Yes | 1m | $2.05 (LT1307BCS8#PBF) |
| 91 | LT1307 | 1 | 920m | 12 | 600m | 30 | Yes | 50µ | $2.05 (LT1307CN8#PBF) |
| 92 | LT1375HV | 1 | 5 | 30 | 2 | 25.8 | Yes | 2.5m | $3.50 (LT1375HVCS8#PBF) |
| 93 | LT1375 | 1 | 5 | 25 | 2 | 21.5 | Yes | 2.5m | $3.20 (LT1375CS8#PBF) |
| 94 | LT1377 | 1 | 2.7 | 30 | 2 | 35 | Yes | 4m | $4.20 (LT1377CS8#PBF) |
| 95 | LT1171HV | 1 | 3 | 60 | 2.5 | 60 | Yes | 6m | $6.00 (LT1171HVCT#PBF) |
| 96 | LT1171 | 1 | 3 | 40 | 2.5 | 40 | Yes | 6m | $4.60 (LT1171CT#06PBF) |
| 97 | LT1170HV | 1 | 3 | 60 | 5 | 60 | Yes | 6m | $7.25 (LT1170HVCT#06PBF) |
| 98 | LT1170 | 1 | 3 | 40 | 5 | 40 | Yes | 6m | $5.60 (LT1170CT#06PBF) |
| 99 | LT1071HV | 1 | 3 | 60 | 2.5 | 40 | Yes | 6m | $6.00 (LT1071HVCT#PBF) |
| 100 | LT1071 | 1 | 3 | 40 | 2.5 | 40 | Yes | 6m | $4.60 (LT1071CT#06PBF) |
| 101 | LT1070HV | 1 | 3 | 60 | 5 | 40 | Yes | 6m | $7.25 (LT1070HVCT#06PBF) |
| 102 | LT1070 | 1 | 3 | 40 | 5 | 40 | Yes | 6m | $5.60 (LT1070CT#06PBF) |
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