Power Management Switching Regulator Step-Down (Buck) Regulators Buck Regulator Plus LDO

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Input V V
 Output 1 V A
 Output 2 V A
       
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Number of Outputs Vin Min Vin Max Buck Output Current LDO Output Current Synchronous Monolithic Packages Comments Isupply Frequency Frequency Adjust Range Frequency Sync Range Features Ishutdown Integrated Inductor Architecture Temp Range Output Current Topology Topology 1 Switch Current Vout Min Vout Max Topology 2 Output Current 2 Vout Min 2 Vout Max 2 Topology 3 Output Current 3 Vout Min 3 Vout Max 3 Topology 4 Output Current 4 Design Tools Demo Boards Featured New Date Added Price 1k* Product Category Package Area Package Height Export Control Auto & Transport Terminal Finish
Units V V A A yes/no yes/no mA kHz µA yes/no A A V V A V V A V V A mm² mm yes/no
Selection
(hold Ctrl key to select multiple,
hold Shift key to select range)
LT1941 3 3.3 25 2, 3 Controller no yes TSSOP-28 Triple Output 3A Buck, 2A Buck, 1.5A Inverting/Boost 2 1100 Anti-Phase Switching, Power Good 50 no Constant Frequency Current Mode E 3 Buck, Boost, Sepic, Flyback, Inverting Buck 4.3 0.628 35.2 Buck 2 0.628 35.2 Inverting, Boost 1.25 40 LTspice File DC621A no no 2004-06-03 $5.25 (LT1941EFE) Buck Regulator Plus LDO,Internal Power Switch Boost,Internal Power Switch Buck,Multiple Output Buck,Multitopology DC/DC,SEPIC Regulators 62.7mm² (TSSOP-28) 1.2mm (TSSOP-28) no no Lead,Matte Tin
LT3507A 4 4 36 1.8, 1.8, 2.7 Controller no yes 5x7 QFN-38,TSSOP-38 Triple Step-Down (2.7A & Two 1.8A), LDO, Improved Iout 5 2500 250kHz - 2.5MHz 250kHz - 2.5MHz Anti-Phase Switching, Resistor Set Frequency, External Synchronization, Tracking, LDO 1 no Constant Frequency Current Mode E,I,H 2.7 Buck, LDO Buck 4.3 0.8 32.4 Buck 1.8 0.6 32.4 Buck 1.8 0.6 32.4 LDO 1 LTspice File,LTpowerCAD Model DC1781A no no 2011-06-27 $4.25 (LT3507AEUHF) Buck Regulator Plus LDO,Extended Temperature (H & MP) Switching Regulators,Internal Power Switch Buck,Multiple Output Buck,Multitopology DC/DC 35mm² (5x7 QFN-38),62.7mm² (TSSOP-38) 0.75mm (5x7 QFN-38),1.2mm (TSSOP-38) no yes Matte Tin
LTC3104 2 2.5 15 0.3 0.01 yes yes 4x3 DFN-14,MS-16E 2.6uA Quiescent Current, 300mA Buck & 10mA LDO 0.0026 1200 Burst Mode, Power Good, LDO 1 no Constant Frequency Current Mode E,I 0.3 Buck, LDO Buck 0.5 0.6 13.8 LDO 0.01 0.6 - LTspice Model DC1754A no no 2011-11-04 $2.70 (LTC3104EDE) Buck Regulator Plus LDO,Energy Harvesting,Internal Power Switch Buck,Micropower Buck Regulators 12mm² (4x3 DFN-14),19.8mm² (MS-16E) 0.75mm (4x3 DFN-14),1.1mm (MS-16E) no yes Matte Tin
LTC3100 3 0.65 5 0.25 0.1 yes yes 3x3 QFN-16 700mA Boost, 250mA Buck, 100mA LDO 0.015 1500 Burst Mode, Power Good, LDO, Output Disconnect, Sequencing 0.01 no Constant Frequency Current Mode E 0.25 Buck, Boost, LDO Buck 0.45 0.6 5.25 Boost 0.1 0.6 5.25 LDO 0.6 2.5 LTspice File DC1326A no no 2008-05-08 $3.10 (LTC3100EUD) Buck Regulator Plus LDO,Internal Power Switch Buck,Micropower Buck Regulators,Multitopology DC/DC 9mm² (3x3 QFN-16) 0.75mm (3x3 QFN-16) no no Matte Tin
LT3667 3 4.3 40 0.4 0.2, 0.2 no yes 3x5 QFN-24,MS-16E 60V Transient Protection, Dual LDO 0.040 2200 250kHz - 2.2MHz 300kHz - 2.2MHz Burst Mode, Resistor Set Frequency, External Synchronization, Power Good 0.01 no Constant Frequency Current Mode E,I,H 0.4 Buck, LDO, LDO Buck 0.75 1.2 38.6 LDO 0.2 0.8 38.6 LDO 0.2 0.8 38.6 LTspice File DC1869A yes no 2014-02-03 $2.55 (LT3667EMSE) Buck Regulator Plus LDO,Extended Temperature (H & MP) Switching Regulators,High Input Voltage Buck,Multitopology DC/DC 15mm² (3x5 QFN-24),19.8mm² (MS-16E) 0.75mm (3x5 QFN-24),1.1mm (MS-16E) no no Matte Tin
LT3668 3 4.3 40 0.4 0.2, 0.2 no yes MS-16E 40V 400mA Step-Down Switching Reg. with Dual Tracking LDOs 0.050 2200 250kHz - 2.2MHz Burst Mode, Tracking, Resistor Set Frequency, Power Good 1 no Constant Frequency Current Mode E,I,H 0.4 Buck, LDO Buck 0.75 1.2 39.4 LDO 0.2 1 10 LDO 0.2 1 10 LTspice Model DC2243A no no 2014-10-07 $2.55 (LT3668EMSE) Buck Regulator Plus LDO,Extended Temperature (H & MP) Switching Regulators,Internal Power Switch Buck,Multitopology DC/DC 19.8mm² (MS-16E) 1.1mm (MS-16E) no no Matte Tin
LT3500 2 3 36 2 Controller no yes 3x3 DFN-12,MS-16E 2A, 36V Step-Down with LDO Controller 2.5 2200 250kHz - 2.2MHz 250kHz - 2.2MHz External Synchronization, Resistor Set Frequency, Power Good, LDO 12 no Constant Frequency Current Mode E,I,H 2 Buck, LDO Buck 2.8 0.8 34.92 LDO 1 0.8 36 - LTspice File,LTpowerCAD Model DC1069A no no 2007-10-12 $3.25 (LT3500EDD) Buck Regulator Plus LDO,Extended Temperature (H & MP) Switching Regulators,High Input Voltage Buck,Internal Power Switch Buck,Multitopology DC/DC 9mm² (3x3 DFN-12),19.8mm² (MS-16E) 0.75mm (3x3 DFN-12),1.1mm (MS-16E) no yes Matte Tin
LTC3445 3 2.5 5.5 0.6 0.05, 0.05 yes yes 4x4 QFN-24 I2C Controllable 600mA Buck with Two 50mA LDOs 0.22 1500 I2C Control, LDO, Adjustable Slew Rate, Spread Spectrum, PowerPath 6 no Constant Frequency Current Mode E 0.6 Buck, LDO, LDO Buck 1 0.85 1.55 LDO 0.05 0.85 5 LDO 0.05 0.85 5 - DC698A no no 2004-12-06 $2.45 (LTC3445EUF) Buck Regulator Plus LDO,Digitally Programmable Regulators,Internal Power Switch Buck,Multitopology DC/DC 16mm² (4x4 QFN-24) 0.75mm (4x4 QFN-24) no no Matte Tin
LTC1704 2 3.15 5.5 20 2 yes no SSOP-16 Synchronous Step-Down Controller, LDO Controller 4.5 550 LDO 75 no Constant Frequency Current Mode E 20 Buck, LDO Buck 20 0.8 6 LDO 2 0.8 - - DC357A-A,DC357A-B no no 2002-04-01 $4.10 (LTC1704BEGN) Buck Regulator Plus LDO,External Power Switch Buck Controllers 30.9mm² (SSOP-16) 1.75mm (SSOP-16) no no Lead,Matte Tin
LTC3700 2 2.65 9.8 5 0.15 no no MS-10 Buck Controller with LDO 0.21 550 LDO, Burst Mode, 100% Duty Cycle 10 no Constant Frequency Current Mode E 5 Buck, LDO Buck 10 0.8 9.8 LDO 0.15 2.8 LTspice Model DC463A no no 2002-05-21 $2.35 (LTC3700EMS) Buck Regulator Plus LDO,External Power Switch Buck Controllers 14.7mm² (MS-10) 1.1mm (MS-10) no no Lead,Matte Tin
LTC3670 3 2.5 5.5 0.5 0.15, 0.15 yes yes 3x2 DFN-12 Monolithic 400mA Buck Regulator with Dual 150mA LDOs 0.07 2250 LDO, Burst Mode, Adjustable Slew Rate 1 no Constant Frequency Current Mode E 0.4 Buck, LDO Buck 0.8 0.8 5.5 LDO 0.15 0.8 5.5 LDO 0.15 0.8 5.5 LTspice Model DC1277A no no 2008-01-23 $1.95 (LTC3670EDDB) Buck Regulator Plus LDO,Internal Power Switch Buck,Micropower Buck Regulators,Multitopology DC/DC 6mm² (3x2 DFN-12) 0.75mm (3x2 DFN-12) no no Matte Tin
LTC3672B-1 3 2.9 5.5 0.5 0.15, 0.15 yes yes 2x2 DFN-8 400mA Buck (Fixed 1.8V) with Dual 150mA LDOs (Fixed 1.2V & 2.8V) 0.26 2250 LDO, Fixed Output, 100% Duty Cycle, Adjustable Slew Rate 1 no Constant Frequency Current Mode E 0.4 Buck, LDO Buck 0.8 1.8 1.8 LDO 0.15 1.2 1.2 LDO 0.15 2.8 2.8 LTspice Model - no no 2007-06-20 $1.95 (LTC3672BEDC-1) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 4mm² (2x2 DFN-8) 0.75mm (2x2 DFN-8) no no Matte Tin
LTC3672B-2 3 2.9 5.5 0.5 0.15, 0.15 yes yes 2x2 DFN-8 400mA Buck (Fixed 1.2V) with Dual 150mA LDOs (Fixed 1.8V & 2.8V) 0.26 2250 LDO, Fixed Output, 100% Duty Cycle, Adjustable Slew Rate 1 no Constant Frequency Current Mode E 0.4 Buck, LDO Buck 0.8 1.2 1.2 LDO 0.15 1.8 1.8 LDO 0.15 2.8 2.8 LTspice Model DC1324A no no 2007-07-30 $1.95 (LTC3672BEDC-2) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 4mm² (2x2 DFN-8) 0.75mm (2x2 DFN-8) no no Matte Tin
LTC3446 3 2.7 5.5 1 0.3, 0.3 yes yes 4x3 DFN-14 1A Buck Regulator with Dual 600mA VLDO Regulators 0.05 2250 LDO, Power Good, Burst Mode 1 no Constant Frequency Current Mode E,I 1 Buck, LDO, LDO Buck 1.55 0.8 5.5 LDO 0.3 0.4 5.432 LDO 0.3 0.4 5.432 LTspice Model DC893A no no 2006-09-12 $2.75 (LTC3446EDE) Buck Regulator Plus LDO,Internal Power Switch Buck,Micropower Buck Regulators,Multitopology DC/DC 12mm² (4x3 DFN-14) 0.75mm (4x3 DFN-14) no yes Lead,Matte Tin
LTC3541-3 2 2.7 5.5 0.5 0.3 yes yes 3x3 DFN-10 500mA Buck + 300mA VLDO, LTC3541-3 LDO Powers Up First, 1.8V Fixed Vout 0.285 2250 LDO, Sequencing, 100% Duty Cycle 0.1 no Constant Frequency Current Mode E 0.5 Buck, LDO Buck 0.95 1.8 1.8 LDO 0.3 1.575 1.575 - LTspice Model - no no 2007-02-13 $1.89 (LTC3541EDD-3) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 9mm² (3x3 DFN-10) 0.75mm (3x3 DFN-10) no no Matte Tin
LTC3541-2 2 2.7 5.5 0.5 0.3 yes yes 3x3 DFN-10 500mA Buck + 300mA VLDO, LTC3541-2 Buck Powers Up First, 1.875V Fixed Vout 0.285 2250 LDO, Sequencing, 100% Duty Cycle 0.1 no Constant Frequency Current Mode E 0.5 Buck, LDO Buck 0.95 1.875 1.875 LDO 0.3 1.5 1.5 - LTspice Model - no no 2007-02-13 $1.89 (LTC3541EDD-2) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 9mm² (3x3 DFN-10) 0.75mm (3x3 DFN-10) no no Matte Tin
LTC3541 2 2.7 5.5 0.5 0.3 yes yes 3x3 DFN-10 500mA Buck + 300mA VLDO, LTC3541 Buck Powers Up First 0.285 2250 LDO, Sequencing, 100% Duty Cycle 0.1 no Constant Frequency Current Mode E 0.5 Buck, LDO Buck 0.95 0.8 5 LDO 0.3 0.4 4.1 - LTspice File DC970A-A no no 2007-02-13 $1.89 (LTC3541EDD) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 9mm² (3x3 DFN-10) 0.75mm (3x3 DFN-10) no no Matte Tin
LTC3541-1 2 2.7 5.5 0.5 0.3 yes yes 3x3 DFN-10 500mA Buck + 300mA VLDO, LTC3541-1 LDO Powers Up First 0.315 2250 LDO, Sequencing, 100% Duty Cycle 0.1 no Constant Frequency Current Mode E 0.5 Buck, LDO Buck 0.95 0.8 5 LDO .3 0.4 4.1 - LTspice Model DC970A-B no no 2007-02-13 $1.89 (LTC3541EDD-1) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 9mm² (3x3 DFN-10) 0.75mm (3x3 DFN-10) no no Matte Tin
LT3507 4 4 36 1.5, 1.5, 2.4 Controller no yes 5x7 QFN-38 Triple Step-Down (2.4A & Two 1.5A), LDO Controller 2 2500 250kHz - 2.5MHz 250kHz - 2.5MHz LDO, Tracking, Power Good, Resistor Set Frequency, External Synchronization 1 no Constant Frequency Current Mode E,I,H 2.4 Buck, LDO Buck 4.3 0.8 32.4 Buck 1.5 0.8 32.4 Buck 1.5 0.8 32.4 LDO 1 LTspice File,LTpowerCAD Model DC1161B no no 2008-04-11 $4.25 (LT3507EUHF) Buck Regulator Plus LDO,Extended Temperature (H & MP) Switching Regulators,Internal Power Switch Buck,Multiple Output Buck,Multitopology DC/DC 35mm² (5x7 QFN-38) 0.75mm (5x7 QFN-38) no yes Matte Tin
LT3694 3 4 36 2.6 Controller, Controller no yes 4x5 QFN-28,TSSOP-20 36V, 2.6A Monolithic Buck Regulator with Dual LDO 1 2500 250kHz - 2.5MHz 250kHz - 2.5MHz LDO, Tracking, Resistor Set Frequency, External Synchronization 0.1 no Constant Frequency Current Mode E,I 2.6 Buck, LDO Buck 4.9 0.75 16 LDO 1 0.75 16 LDO 1 0.75 16 LTspice File,LTpowerCAD Model DC1541A-A yes no 2010-10-29 $3.85 (LT3694EUFD-1) Buck Regulator Plus LDO,High Input Voltage Buck,Internal Power Switch Buck,Multitopology DC/DC 20mm² (4x5 QFN-28),42.2mm² (TSSOP-20) 0.75mm (4x5 QFN-28),1.2mm (TSSOP-20) no yes Matte Tin
LT1939 2 3 25 2 Controller no yes 3x3 DFN-12 2A, 25V Step-Down with LDO Controller 2.5 2200 250kHz to 2.2MHz 250kHz to 2.2MHz LDO, Tracking, Resistor Set Frequency, External Synchronization, Power Good 12 no Constant Frequency Current Mode E,I 2 Buck, LDO Buck 2.8 0.8 24.25 LDO 1 0.8 24.2 - LTspice File,LTpowerCAD Model DC1293A no no 2008-01-08 $3.05 (LT1939EDD) Buck Regulator Plus LDO,Internal Power Switch Buck,Multitopology DC/DC 9mm² (3x3 DFN-12) 0.75mm (3x3 DFN-12) no yes Matte Tin
LTM8001 6 6 36 5 1.1, 1.1, 1.1, 1.1, 1.1 no yes 15mm x 15mm x 3.42mm BGA 36VIN, 5A μModule Regulator with 5-Output Configurable LDO Array 26 1000 Up to 1MHz Up to 1MHz Output Current Regulation, Sequencing, Resistor Set Frequency, External Synchronization 0.1 yes Constant Frequency Current Mode E,I,MP 5 Buck, LDO Buck 5 1.2 24 LDO 1.1 0 24 LDO 1.1 0 24 LDO LTspice File DC1818A no no 2013-02-27 $17.40 (LTM8001EY) Buck Regulator Plus LDO,Extended Temperature (H & MP) uModule Regulators,uModule Buck Regulators 225mm² (15mm x 15mm x 3.42mm BGA) 3.42mm (15mm x 15mm x 3.42mm BGA) no no SAC305,Tin-Lead
LT3645 2 3.6 36 0.5 0.2 no yes 3x3 QFN-16,MS-12E 36V 500mA Step-Down Regulator and 200mA LDO 1.4 750 Overvoltage Protection, LDO, Power Good 0.01 no Constant Frequency Current Mode E,I,H 0.5 Buck, LDO Buck 1 0.8 16 LDO 0.2 0.8 - LTspice File,LTpowerCAD Model DC1428A no no 2011-05-02 $2.25 (LT3645EUD) Buck Regulator Plus LDO,Extended Temperature (H & MP) Switching Regulators,High Input Voltage Buck,Multitopology DC/DC 9mm² (3x3 QFN-16),19.8mm² (MS-12E) 0.75mm (3x3 QFN-16),1.1mm (MS-12E) no yes Matte Tin
LT3570 2 2.1 36 1.5 Controller no yes 4x4 QFN-24,TSSOP-20 1.5A Buck, 1.5A Boost and LDO Controller 3.2 2500 500kHz - 2MHz Up to 2.5MHz Resistor Set Frequency, External Synchronization, LDO 0 no Constant Frequency Current Mode E,I 1.5 Buck, Boost, LDO Buck 2.4 0.8 36 Boost, Sepic, Flyback 1 0.8 36 - .020 LTspice File DC1106A no no 2008-10-08 $2.95 (LT3570EUF) Buck Regulator Plus LDO,Internal Power Switch Boost,Internal Power Switch Buck,Multitopology DC/DC 16mm² (4x4 QFN-24),42.2mm² (TSSOP-20) 0.75mm (4x4 QFN-24),1.2mm (TSSOP-20) no yes Matte Tin