Multitopology DC/DC
Many of Analog Devices’ power management products incorporate one or more switch mode dc-to-dc regulators of different types and topologies. Products in this category offer two or more regulators, combining buck, boost, buck/boost, SEPIC, and/or inverting switching regulators in a single, small package. Some products also incorporate one or more linear regulators as well. Applications for these multitopology products include split positive and negative supplies for high performance op amps and signal conditioning circuitry or combining multiple power supplies into a single, compact IC.
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Design Notes
- DN357 - Tiny, Highly Flexible, Dual Boost/Inverter Tracks Supplies PDF
- DN349 - Quad Output Switching Converter Provides Power for Large TFT LCD Panels PDF
- DN359 - Dual DC/DC Converter with Integrated Schottkys Generates ±40V Outputs and Consumes Only 40µA Quiescent Current PDF
- DN278 - Efficient DC/DC Converter Provides Two 15A Outputs from a 3.3V Backplane PDF
- DN441 - Compact Triple Step-Down Regulator Offers LDO Driver and Output Tracking and Sequencing PDF
- DN440 - Versatile TFT LCD Bias Supply and White LED Driver in a 4mm × 4mm QFN PDF
- DN419 - One IC Generates Three Sub-2V Power Rails from a Li-Ion Cell PDF
- DN400 - True Rail-to-Rail, High Input Impedance ADC Simplifies Precision Measurements PDF
- Design Solutions 10 - Active Voltage Positioning Reduces Output Capacitors PDF
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LT Journal
- The Harsh Reality of Wide-Ranging 4V–36V Automotive Batteries Is No Problem for Triple Output Regulator in 4mm × 5mm QFN PDF
- 4mm × 7mm IC Produces Seven Regulated Outputs and a Dual-String LED Driver PDF
- January 2009 - ±32V Triple-Output Supply for LCDs, CCDs and LEDs Includes Fault Protection in a 3mm × 3mm QFN PDF
- Jun 2007 - 0.25in 2 x 1.8mm Dual Output Converter for Li-Ion to 3.3V and 1.8V PDF
- September 2008 - Complete Power Solution for Digital Cameras and Other Complex Compact Portable Applications PDF
- September 2008 - 5-Output High Current Power Supply for TFT-LCDs in a Low Profile QFN Features Space-Saving 2MHz Switching Regulators PDF
- June 2008 - Multi-Rail DC/DC Converter in a 3mm × 3mm QFN Takes Inputs as Low as 0.7V PDF
- June 2008 - Quad Output Regulator Meets Varied Demands of Multiple Power Supplies PDF
- Jan 2008 - Complete 3-Rail Power Supply in a 4mm × 4mm QFN Package PDF
- Jan 2008 - Monolithic 2A Buck Regulator Plus Linear Regulator Simplifies Wide Input Voltage Applications PDF
- May 2004 Triple Output LCD Power Supply Delivers 95% Efficiency from a Tiny 3mm x 3mm Package PDF
- May 2002 Efficient DC/DC Converter Provides Two 15A Outputs from a 3.3V Backplane PDF
- Nov 2000 Triple, High Output Current Supply Requires only 3.3V Input and Minimal Input Capacitance PDF
Technical Articles
Multitopology DC/DC
| SortOrder | Part# | Number of Outputs | Buck Output Current (typ) (A) | Buck-Boost Output Current (typ) (A) | Boost Switch Current (typ) (A) | Inverting Switch Current (typ) (A) | LDO Output Current (typ) (A) | Comments | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTC7818 | 3 | 25, 25 | - | 10 | - | - | 40V, Low IQ, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller | $3.95 (LTC7818EUJ#PBF) |
| 2 | ADP5076 | 2 | - | - | 2 | 1.2 | - | 2.0A/1.2A DCDC Switching Regulators with Independent Positive and Negative Outputs | $2.19 (ADP5076ACBZ-R7) |
| 3 | ADP5072 | 2 | - | - | 1 | 600m | - | 1.0A/0.6A DCDC Switching Regulators with Independent Positive and Negative outputs, in WLCSP package | $2.19 (ADP5072ACBZ-R7) |
| 4 | ADP1031 | 3 | 300m | - | - | 300m | - | Isolated Flyback with additional Buck and Inverter, plus High Speed Isolated Digital Channels | $5.18 (ADP1031ACPZ-4-R7) |
| 5 | LTC7815 | 3 | 25, 25 | - | 25 | - | - | Low IQ, 2.25MHz, Triple Output, Buck/Buck/Boost Synchronous Controller | $4.35 (LTC7815EUHF#PBF) |
| 6 | ADP2450 | 2 | 500m | - | - | - | - | Power Management IC for Circuit Breaker Application | $1.50 (ADP2450ACPZ-1-R7) |
| 7 | LT8603 | 4 | 1.5, 1.8, 2.5 | - | 20 | - | - | 42V, Low IQ, Quad Output Triple Monolithic Buck Converter and Boost Controller | $3.63 (LT8603JUJ#PBF) |
| 8 | LTC7813 | 2 | 20 | - | 20 | - | - | Low IQ, 60V Synchronous Boost+Buck Controller | $4.82 (LTC7813EUH#PBF) |
| 9 | LTC7812 | 2 | 20 | - | 20 | - | - | Low IQ, 38V Synchronous Boost+Buck Controller | $4.00 (LTC7812EUH#PBF) |
| 10 | LTC3899 | 3 | 15, 15 | - | 15 | - | - | 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller | $4.95 (LTC3899EUHF#PBF) |
| 11 | ADP5070 | 2 | - | - | 1 | 600m | - | 1 A/0.6 A, DC-to-DC Switching Regulator with Independent Positive and Negative Outputs | $2.19 (ADP5070ACPZ) |
| 12 | ADP5071 | 2 | - | - | 2 | 1.2 | - | 2 A/1.2 A DC-to-DC Switching Regulator with Independent Positive and Negative Outputs | $2.39 (ADP5071ACPZ) |
| 13 | LT3668 | 3 | 400m | - | - | - | 200m, 200m | 40V 400mA Step-Down Switching Reg. with Dual Tracking LDOs | $2.55 (LT3668EMSE#PBF) |
| 14 | LT8471 | 2 | 2, 2 | - | 2, 2 | 2, 2 | - | Dual, Multitopology (Buck/Boost/SEPIC/Inverter/Flyback) | $3.75 (LT8471EFE#PBF) |
| 15 | LT3667 | 3 | 400m | - | - | - | 200m, 200m | 60V Transient Protection, Dual LDO | $2.55 (LT3667EMSE#PBF) |
| 16 | ADP5080 | 8 | 800m, 1.15, 1.5, 2, 3 | 2 | - | - | 300m, 400m | Tiny 15V PMU with 6 CH DC/DCs and 2 LDOs for Multicell Lithium Ion Battery Applications | $3.99 (ADP5080ACBZ-1-RL) |
| 17 | LTC3676 | 7 | 1.5, 1.5, 2.5, 2.5 | - | - | - | 300m, 300m, 300m | LTC3676-1 has ±1.5A DDR, VTTR ref | $5.50 (LTC3676EUJ#PBF) |
| 18 | LTC3859AL | 3 | 25, 25 | - | 25 | - | - | Triple Buck/Buck/Boost Synch Controller, Improved Burst Mode | $4.35 (LTC3859ALEUHF#PBF) |
| 19 | ADP5052 | 5 | 1.2, 1.2, 4, 4 | - | - | - | 200m | 5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator | $3.59 (ADP5052ACPZ-R7) |
| 20 | ADP5050 | 5 | 1.2, 1.2, 4, 4 | - | - | - | 200m | 5-Channel Integrated Power Solution with Quad Buck Regulators, 200 mA LDO Regulator and I2C interfac | $4.39 (ADP5050ACPZ-R7) |
| 21 | LT8582 | 2 | - | - | 3, 3 | 4.3 | - | Dual 3A Boost/Inverting/SEPIC DC/DC Converter with Fault Protection | $3.75 (LT8582EDKD#PBF) |
| 22 | ADP5041 | 3 | 1.2 | - | - | - | 300m, 300m | Micro PMU with 1.2 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset | $1.79 (ADP5041ACPZ-1-R7) |
| 23 | ADP5040 | 3 | 1.2 | - | - | - | 300m, 300m | Micro PMU with 1.2 A Buck Regulator and Two 300 mA LDOs | $1.39 (ADP5040ACPZ-1-R7) |
| 24 | ADP5037 | 4 | 800m, 800m | - | - | - | 300m, 300m | Dual 3 MHz, 800 mA Buck Regulators with Two 300 mA LDOs | $1.69 (ADP5037ACPZ-1-R7) |
| 25 | ADP5024 | 3 | 1.2, 1.2 | - | - | - | 300m | Dual 3 MHz, 1200 mA Buck Regulators with One 300 mA LDO | $1.79 (ADP5024ACPZ-1-R7) |
| 26 | ADP5023 | 3 | 800m, 800m | - | - | - | 300m | Dual 3 MHz, 800 mA Buck Regulator with One 300 mA LDO | $1.59 (ADP5023ACPZ-1-R7) |
| 27 | LT3507A | 4 | 1.8, 1.8, 2.7 | - | - | - | 1 | Triple Step-Down (2.7A & Two 1.8A), LDO, Improved Iout | $4.25 (LT3507AEUHF#PBF) |
| 28 | ADP5034 | 4 | 1.2, 1.2 | - | - | - | 300m, 300m | Dual 3 MHz, 1200mA Buck Regulator with Two 300 mA LDOs | $1.99 (ADP5034ACPZ-1-R7) |
| 29 | ADP5033 | 4 | 800m, 800m | - | - | - | 300m, 300m | Dual 3 MHz, 800 mA Buck Regulators with Two 300 mA LDOs | $1.90 (ADP5033ACBZ-10-R7) |
| 30 | LT3645 | 2 | 500m | - | - | - | 200m | 36V 500mA Step-Down Regulator and 200mA LDO | $2.25 (LT3645EUD#PBF) |
| 31 | ADP5043 | 2 | 800m | - | - | - | 300m | Micro-PMU with 0.8 A Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset | $1.79 (ADP5043ACPZ-1-R7) |
| 32 | ADP5042 | 3 | 800m | - | - | - | 300m, 300m | Micro PMU with 0.8 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset | $1.99 (ADP5042ACPZ-1-R7) |
| 33 | LTC3675 | 7 | 500m, 500m, 1, 1 | 1 | 1 | - | 25m | 7-Channel Configurable High Power PMIC | $5.05 (LTC3675EUFF#PBF) |
| 34 | LTC3589-2 | 8 | 1, 1, 1.6 | 1.2 | - | - | 25m, 250m, 250m, 250m | 8-Output I2C Regulator, PGOOD Timeout Disabled, 2ms PWR_ON to Wake Delay, No Wait to Enable | $4.65 (LTC3589EUJ-2#PBF) |
| 35 | LTC3589-1 | 8 | 1, 1, 1.6 | 1.2 | - | - | 25m, 250m, 250m, 250m | 8-Output I2C Regulator, PGODD Timeout Disabled, 2ms PWR_ON to Wake Delay | $4.65 (LTC3589EUJ-1#PBF) |
| 36 | LTC3589 | 8 | 1, 1, 1.6 | 1.2 | - | - | 25m, 250m, 250m, 250m | 8-Output I2C Regulator, PGOOD Timeout Enabled, 50ms PWR_ON to Wake Delay | $4.65 (LTC3589EUJ#PBF) |
| 37 | LT3694 | 3 | 2.6 | - | - | - | 1 | 36V, 2.6A Monolithic Buck Regulator with Dual LDO | $3.85 (LT3694EUFD#PBF) |
| 38 | LTC3521 | 3 | 600m, 600m | 1 | - | - | - | Wide Vin, 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters | $3.25 (LTC3521EUF#PBF) |
| 39 | LT3582 | 2 | - | - | 350m | 600m | - | I2C Programmable Boost & Inverter with OTP, -5 and -12 Offer Fixed Vout | $2.25 (LT3582EUD#PBF) |
| 40 | LT3587 | 3 | - | - | 20m, 50m | 100m | - | High Voltage Monolithic Inverter and Dual Boost | $2.95 (LT3587EUD#PBF) |
| 41 | LT3570 | 2 | 1.5 | - | 1.5 | - | 1 | 1.5A Buck, 1.5A Boost and LDO Controller | $2.95 (LT3570EUF#PBF) |
| 42 | LT3513 | 5 | 2.5 | - | 250m, 1.6 | 250m | - | 2MHz High Current 5-Output Regulator for TFT-LCD Panels | $4.25 (LT3513EUHF#PBF) |
| 43 | LTC3100 | 3 | 250m | - | 700m | - | 100m | 700mA Boost, 250mA Buck, 100mA LDO | $3.10 (LTC3100EUD#PBF) |
| 44 | LT3507 | 4 | 1.5, 1.5, 2.4 | - | - | - | 1 | Triple Step-Down (2.4A & Two 1.5A), LDO Controller | $4.25 (LT3507EUHF#PBF) |
| 45 | LTC3523 | 2 | 400m | - | 600m | - | - | Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters | $2.95 (LTC3523EUD#PBF) |
| 46 | LT1939 | 2 | 2 | - | - | - | 1 | 2A, 25V Step-Down with LDO Controller | $3.05 (LT1939EDD#PBF) |
| 47 | LTC3672B-2 | 3 | 500m | - | - | - | 150m, 150m | 400mA Buck (Fixed 1.2V) with Dual 150mA LDOs (Fixed 1.8V & 2.8V) | $1.95 (LTC3672BEDC-2#TRPBF) |
| 48 | LTC3520 | 2 | 600m | 1 | - | - | - | Dual Output-Synchronous 1A Buck-Boost and a 600mA Buck | $3.50 (LTC3520EUF#PBF) |
| 49 | LT3500 | 2 | 2 | - | - | - | 1 | 2A, 36V Step-Down with LDO Controller | $3.25 (LT3500EDD#PBF) |
| 50 | LTC3672B-1 | 3 | 500m | - | - | - | 150m, 150m | 400mA Buck (Fixed 1.8V) with Dual 150mA LDOs (Fixed 1.2V & 2.8V) | $1.95 (LTC3672BEDC-1#TRPBF) |
| 51 | LTC3522 | 2 | 200m | 400m | - | - | - | Dual Output Synchronous 400mA Buck-Boost and 200mA Buck | $2.50 (LTC3522EUD#PBF) |
| 52 | LTC3670 | 3 | 500m | - | - | - | 150m, 150m | Monolithic 400mA Buck Regulator with Dual 150mA LDOs | $1.95 (LTC3670EDDB#TRPBF) |
| 53 | LTC3537 | 2 | - | - | 600m | - | 100m | 2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO | $2.40 (LTC3537EUD#PBF) |
| 54 | LTC3524 | 4 | - | - | 2m, 25m | 2m | - | Adjustable TFT Bias Supply with WLED Driver | $2.25 (LTC3524EUF#PBF) |
| 55 | LTC3541-3 | 2 | 500m | - | - | - | 300m | 500mA Buck + 300mA VLDO, LTC3541-3 LDO Powers Up First, 1.8V Fixed Vout | $1.89 (LTC3541EDD-3#PBF) |
| 56 | LTC3541-2 | 2 | 500m | - | - | - | 300m | 500mA Buck + 300mA VLDO, LTC3541-2 Buck Powers Up First, 1.875V Fixed Vout | $1.89 (LTC3541EDD-2#PBF) |
| 57 | LTC3446 | 3 | 1 | - | - | - | 300m, 300m | 1A Buck Regulator with Dual 600mA VLDO Regulators | $2.75 (LTC3446EDE#PBF) |
| 58 | LTC3541-1 | 2 | 500m | - | - | - | 300m | 500mA Buck + 300mA VLDO, LTC3541-1 LDO Powers Up First | $1.89 (LTC3541EDD-1#PBF) |
| 59 | LTC3541 | 2 | 500m | - | - | - | 300m | 500mA Buck + 300mA VLDO, LTC3541 Buck Powers Up First | $1.89 (LTC3541EDD#PBF) |
| 60 | LTC3445 | 3 | 600m | - | - | - | 50m, 50m | I2C Controllable 600mA Buck with Two 50mA LDOs | $2.45 (LTC3445EUF#PBF) |
| 61 | LT1942 | 4 | - | - | 80m, 80m | - | - | Quad DC/DC Converter for Triple Output TFT Supply Plus LED Driver | $2.75 (LT1942EUF#PBF) |
| 62 | LT3472 | 2 | - | - | 20m | 50m | - | Boost and Inverting DC/DC Converter for CCD Bias | $1.95 (LT3472EDD#PBF) |
| 63 | LT3471 | 2 | - | - | 1.3, 1.3 | 1.3 | - | Dual 1.3A, 1.2MHz Boost/Inverter in 3mm × 3mm DFN | $2.80 (LT3471EDD#PBF) |
| 64 | LT1941 | 3 | 2, 3 | - | 1.5 | - | - | Triple Output 3A Buck, 2A Buck, 1.5A Inverting/Boost | $5.25 (LT1941EFE#PBF) |
| 65 | LTC3450 | 3 | - | - | 10m | 500µ | - | Triple Output for TFT-LCD Applications | $2.50 (LTC3450EUD#PBF) |
| 66 | LT3463A | 2 | - | - | 250m, 400m | 400m | - | LT3463A Offers 250mA Boost, 400mA Inverter | $1.95 (LT3463AEDD#PBF) |
| 67 | LT3463 | 2 | - | - | 250m, 250m | 250m | - | Dual 250mA Boost/Inverter | $1.95 (LT3463EDD#PBF) |
| 68 | LT1943 | 4 | 2.4 | - | 350m, 2.6 | 350m | - | High Current Quad Output Regulator for TFT LCD Displays | $4.75 (LT1943EFE#PBF) |
| 69 | LT1945 | 2 | - | - | 350m | 350m | - | 350mA Boost and 350mA Inverter in Single Pakcage | $2.06 (LT1945EMS#PBF) |
| 70 | LTC1876 | 3 | 25, 25 | - | 1 | - | - | Dual Synchronous Buck And One Boost Controller | $5.95 (LTC1876EG#PBF) |
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