Buck-Boost Regulators
Analog Devices offers true buck/boost synchronous dc-to-dc converters. With their unique internal four MOSFET switch combination, these switching regulators can seamlessly transition from step-down mode through 100% dropout operation and then to step-up mode to allow a fixed output voltage even when the input voltage fluctuates above or below the output.
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Design Notes
- Two Terminal Bipolar Power Supply
- Precise Photovoltaic I-V Characterization
- Dual-Channel, 6 A Buck Regulator Delivers High Efficiency Compact Solutions
- Produce Negative Voltages Using the Buck Controller
- High Efficiency, 20 A, Monolithic Silent Switcher 2 Regulator for SoC and Microprocessor Applications
- DN567 - 60V 2MHz Buck-Boost Controllers Regulate High Power Voltage and Current with High Efficiency and Low EMI PDF
- DN553 - Electrolytic Capacitor-Based Data Backup Power Solution for a 12V System Regulated from 5V to 36V Input PDF
- DN540 - 36V Input, 8.5A Buck-Boost μModule Regulator Easily Parallels for Increased Power PDF
- DN361 - Simple Battery Circuit Extends Power over Ethernet (PoE) Peak Current PDF
- DN275 - Single Inductor, Tiny Buck-Boost Converter Provides 95% Efficiency in Lithium-Ion to 3.3V Applications PDF
- DN424 - Buck-Boost Controller Simplifies Design of DC/DC Converters for Handheld Products PDF
- DN413 - Wide Input Voltage Range Buck-Boost Converter Simplifies Design of Variable Input Supplies PDF
- DN369 - Industry's First 4-Switch Buck-Boost Controller Achieves Highest Efficiency Using a Single Inductor PDF
- DN330 - High Input Voltage Monolithic Switcher Steps Up and Down Using a Single Inductor (Design Note 330A) PDF
- DN307 - Supply 2A Pulses for GSM Transmission from 500mA USB or PCMCIA Ports PDF
- DN521 - 80V Synchronous 4-Switch Buck-Boost Controller Delivers Hundreds of Watts with 99% Efficiency PDF
- DN499 - High Efficiency 4-Switch Buck-Boost Controller Provides Accurate Output Current Limit PDF
- DN438 - uModule Buck-Boost Regulators Offer a Simple and Efficient Solution for Wide Input and Output Voltage Range Applications PDF
Product Selector Card
- DC/DC Controller Selection Guide PDF
- 80V to 150V Non-Isolated DC/DC PDF
- High Voltage Non-Isolated Devices PDF
- Practical Ambient Energy Harvesting for WSNs PDF
- SnPb (Tin-Lead) BGA Packages μModule Power Products PDF
- Practical Ambient Energy Harvesting for WSNs PDF
- μModule Power Products PDF
- Constant-Voltage, Constant-Current DC/DC μModule Products PDF
- High Voltage DC/DC μModule Products PDF
- Buck-Boost DC/DC μModule Power Products PDF
LT Journal
- 18V Buck-Boost Converter with Intelligent PowerPath Control Delivers >2A at 95% Efficiency from Dual Inputs PDF
- 1.5A Monolithic Buck-Boost DC/DC Converter with Up to 95% Efficiency Features 2.5V–15V Input and Output Voltage Ranges PDF
- 15V Buck-Boost Converters with Ultralow 1.3µA Quiescent Current are Tailored to Micropower Applications and the Internet of Things PDF
- 15V, 2.5A Monolithic Buck-Boost DC/DC Converter with 95% Efficiency and Low Noise Operation PDF
- Jun 2007 - 0.25in 2 x 1.8mm Dual Output Converter for Li-Ion to 3.3V and 1.8V PDF
- March 2009 - uModule Regulator Fits a (Nearly) Complete Buck-Boost Solution in 15mm × 15mm × 2.8mm for 4.5V–36V VIN to 0.8V–34V VOUT PDF
- Jan 2008 - Complete 3-Rail Power Supply in a 4mm × 4mm QFN Package PDF
- Oct 2007 - Single-IC Converter Operates Buck and Boost to Provide an Output that is Within the Input Voltage Range PDF
- June 2006 Efficient Buck-Boost Converter Ideal for Power Saving Modes and Wide Input Voltage Ranges PDF
- May 2005 - Versatile Buck-Boost Converter Offers High Efficiency in a Wide Variety of Applications PDF
- Dec 2003 High Input Voltage Monolithic Switcher Steps Up and Down Using Single Inductor PDF
- Sep 2003 Monolithic Buck-Boost Converter Provides 1A at 3.3V without Schottky Diodes PDF
- It Just Got Easier to Convert Lithium-Ion Battery Voltage to 3.3V with this Efficient Single Inductor Synchronous Buck-Boost Regulator
- 18V Buck-Boost Converter with Intelligent PowerPath Control Delivers >2A at 95% Efficiency from Dual Inputs
- Hundreds of Watts, 60V In or Out: Synchronous 4-Switch Buck-Boost Converter is Easy to Parallel to Minimize Temperature Rise
- Synchronous, Low EMI LED Driver Features Integrated Switches and Internal PWM Dimming
- 80V Buck-Boost Lead-Acid and Lithium Battery Charging Controller Actively Finds True Maximum Power Point in Solar Power Applications
- 60V Synchronous, Low EMI Buck-Boost for High Power and High Efficiency
Application Notes
- AN119A - Powering Complex FPGA-Based Systems Using Highly Integrated DC/DC uModule Regulator Systems PDF
- AN140 - Basic Concepts of Linear Regulator and Switching Mode Power Supplies (Rev. C) PDF
- AN110 - LTM4601 DC/DC uModule Thermal Performance PDF
- AN103 - LTM4600 DC/DC uModule Thermal Performance PDF
- AN119B - Powering Complex FPGA-Based Systems Using Highly Integrated DC/DC uModule Regulator Systems PDF
- AN117 - DC/DC uModule Regulator Printed Circuit Board Design Guidelines PDF
Technical Articles
- PCB Space-Constraint Woes Eliminated by 2 MHz, Monolithic, Buck-Boost DC-to-DC Converter and LED Driver
- 2.7V to 40V Monolithic Buck-Boost DC/DC Expands Input Capabilities, Regulates Seamlessly through Automotive Cold-Crank and Load-Dump Transients
- Techniques to Maximize Solar Panel Power Output
- TechClip Videos – Real, Repeatable Performance
- Signal Level Shifting with μModule Regulator for Positive-to-Negative Inverting Applications
- LT3790 240W High Efficiency Parallel Buck-Boost Regulator
- 80V Synchronous 4-Switch Buck-Boost Controller Delivers Hundreds of Watts with 99% Efficiency
- Buck-Boost µModule Regulator's External Current Sense Resistor For Paralleling ICs, Current Sharing and Overcurrent Protection
- LTC3779EFE Demo Board | 16V ≤ VIN ≤ 120V, VOUT = 48V @ 10A at up to 99% Efficiency
- 60V 2MHz Buck-Boost Controllers Regulate High Power Voltage and Current with High Efficiency and Low EMI
- How NOT to Damage Your Switching Regulator Demo Board
- Electrolytic Capacitor-Based Data Backup Power Solution for a 12V System Regulated from 5V to 36V Input
- 36V Input, 8.5A Buck-Boost μModule Regulator Easily Parallels for Increased Power
Videos
Press Releases
Buck-Boost Regulators
| SortOrder | Part# | Number of Outputs | Vin (min) (V) | Vin (max) (V) | Output Current (typ) (A) | Vout Min (typ) (V) | Vout Max (typ) (V) | Monolithic | Isupply (typ) (A) | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | LT8491 | 1 | 6 | 80 | 10 | 1.3 | 80 | No | 2.65m | $10.35 (LT8491EUKJ#PBF) |
| 2 | LT8210 | 1 | 2.8 | 100 | 25 | 1 | 100 | No | 18µ | $5.95 (LT8210EFE#PBF) |
| 3 | LT3942 | 1 | 3 | 36 | 2 | 0 | 36 | Yes | 2.6m | $2.95 (LT3942EUFD#PBF) |
| 4 | LT8708-1 | 1 | 2.8 | 80 | 15 | 1.3 | 80 | No | 3.9m | $6.60 (LT8708EUHG-1#PBF) |
| 5 | LT8708 | 1 | 2.8 | 80 | 15 | 1.3 | 80 | No | 3.9m | $6.60 (LT8708EUHG#PBF) |
| 6 | LTC3777 | 1 | 4.5 | 150 | 10 | 1.2 | 150 | No | 3.6m | $8.40 (LTC3777ELXE#PBF) |
| 7 | LTC3779 | 1 | 4.5 | 150 | 10 | 1.2 | 150 | No | 3.6m | $5.95 (LTC3779EFE#PBF) |
| 8 | LT8711 | 1 | 4.5 | 42 | 10 | 800m | 42 | No | 15µ | $2.30 (LT8711EUDC#PBF) |
| 9 | LT8390A | 1 | 4 | 60 | 10 | 1 | 60 | No | 40µ | $4.65 (LT8390AEFE#PBF) |
| 10 | LTM8049 | 2 | 2.6 | 20 | 1 | -24 | 24 | Yes | 10m | $14.20 (LTM8049EY#PBF) |
| 11 | LTC3130 | 1 | 2.4 | 25 | 600m | 1 | 25 | Yes | 1.6µ | $3.35 (LTC3130EMSE#PBF) |
| 12 | LTC7813 | 2 | 2.2 | 60 | 20 | 800m | 60 | No | 34µ | $4.82 (LTC7813EUH#PBF) |
| 13 | LTC3119 | 1 | 250m | 18 | 5 | 795m | 18 | Yes | 31µ | $7.15 (LTC3119EUFD#PBF) |
| 14 | LT8705A | 1 | 2.8 | 80 | 10 | 1.3 | 80 | No | 2.65m | $5.95 (LT8705AEFE#PBF) |
| 15 | LT8390 | 1 | 4 | 60 | 25 | 1 | 60 | No | 2.1m | $4.65 (LT8390EFE#PBF) |
| 16 | LTM8054 | 1 | 5 | 36 | 5.4 | 1.2 | 36 | Yes | 8m | $15.95 (LTM8054EY#PBF) |
| 17 | LTC7812 | 2 | 2.5 | 38 | 20 | 800m | 60 | No | 33µ | $4.00 (LTC7812EUH#PBF) |
| 18 | LTC3335 | 1 | 1.8 | 5.5 | 50m | 1.8 | 5 | Yes | 680n | $3.35 (LTC3335EUDC#PBF) |
| 19 | LTC3106 | 1 | 850m | 5.1 | 300m | 1.8 | 5 | Yes | 1.6µ | $2.94 (LTC3106EUDC#PBF) |
| 20 | LTC3118 | 1 | 2.2 | 18 | 2 | 2 | 18 | Yes | 50µ | $5.75 (LTC3118EUFD#PBF) |
| 21 | LT3790 | 1 | 4.7 | 60 | 10 | 1.2 | 60 | No | 3m | $4.75 (LT3790EFE#PBF) |
| 22 | LTC3331 | 1 | 3 | 19 | 50m | 1.8 | 5 | Yes | 1.3µ | $3.55 (LTC3331EUH#PBF) |
| 23 | LT8490 | 1 | 6 | 80 | 10 | - | - | No | 2.65m | $10.35 (LT8490EUKJ#PBF) |
| 24 | LTC3114-1 | 1 | 2.2 | 40 | 1 | 2.7 | 40 | Yes | 50µ | $3.95 (LTC3114EDHC-1#PBF) |
| 25 | LTM8056 | 1 | 5 | 58 | 4 | 1.2 | 48 | Yes | 8m | $22.00 (LTM8056EY#PBF) |
| 26 | LTM8055 | 1 | 5 | 36 | 8.5 | 1.2 | 36 | Yes | 8m | $22.00 (LTM8055EY#PBF) |
| 27 | LTC3111 | 1 | 2.5 | 15 | 1.4 | 2.5 | 15 | Yes | 55µ | $3.50 (LTC3111EDE#PBF) |
| 28 | ADP5080 | 8 | 4 | 15 | 2 | 800m | 1.2 | Yes | 8m | $3.99 (ADP5080ACBZ-1-RL) |
| 29 | LTC3115-2 | 1 | 2.7 | 40 | 2 | 2.7 | 40 | Yes | 50µ | $5.35 (LTC3115EDHD-2#PBF) |
| 30 | LT8705 | 1 | 2.8 | 80 | 10 | 1.3 | 80 | No | 2.65m | $5.95 (LT8705EFE#PBF) |
| 31 | LTM8045 | 1 | 2.8 | 18 | 1 | -15 | 15 | Yes | 10m | $6.97 (LTM8045EY#PBF) |
| 32 | LTC3330 | 2 | 3 | 18 | 50m | 1.8 | 5 | Yes | 1.3µ | $3.55 (LTC3330EUH#PBF) |
| 33 | LTC3129-1 | 1 | 1.92 | 15 | 200m | 2.5 | 15 | Yes | 1.3µ | $2.95 (LTC3129EMSE-1#PBF) |
| 34 | LTC3129 | 1 | 1.92 | 15 | 200m | 1.4 | 15.75 | Yes | 1.3µ | $2.95 (LTC3129EMSE#PBF) |
| 35 | LT3791-1 | 1 | 4.7 | 60 | 10 | 1.2 | 60 | No | 3m | $4.75 (LT3791EFE-1#PBF) |
| 36 | LTC3536 | 1 | 1.8 | 5.5 | 1 | 1.8 | 5.5 | Yes | 32µ | $2.75 (LTC3536EDD#PBF) |
| 37 | LTC3115-1 | 1 | 2.7 | 40 | 2 | 2.7 | 40 | Yes | 50µ | $5.35 (LTC3115EDHD-1#PBF) |
| 38 | LTC3789 | 1 | 4 | 38 | 10 | 800m | 38 | No | 3m | $4.65 (LTC3789EGN#PBF) |
| 39 | LTC3112 | 1 | 2.7 | 15 | 2.5 | 2.5 | 14 | Yes | 50µ | $4.00 (LTC3112EDHD#PBF) |
| 40 | LTC3521 | 3 | 1.8 | 5.5 | 1 | 1.8 | 5.25 | Yes | 30µ | $3.25 (LTC3521EUF#PBF) |
| 41 | LTC3113 | 1 | 1.8 | 5.5 | 3 | 1.8 | 5.5 | Yes | 40µ | $3.95 (LTC3113EDHD#PBF) |
| 42 | LTM4609 | 1 | 4.5 | 36 | 4 | 800m | 34 | Yes | 2.8m | $22.55 (LTM4609EV#PBF) |
| 43 | LTC3127 | 1 | 1.8 | 5.5 | 1 | 1.8 | 5.25 | Yes | 35µ | $2.95 (LTC3127EDD#PBF) |
| 44 | ADP2504 | 1 | 2.3 | 5.5 | 1 | 2.8 | 5.5 | Yes | 50µ | $1.44 (ADP2504ACPZ-3.3-R7) |
| 45 | ADP2503 | 1 | 2.3 | 5.5 | 600m | 2.8 | 5.5 | Yes | 50µ | $1.34 (ADP2503ACPZ-3.3-R7) |
| 46 | LTC3785-1 | 1 | 2.7 | 10 | 10 | 2.7 | 10 | No | 800µ | $3.75 (LTC3785EUF-1#PBF) |
| 47 | LTC3534 | 1 | 2.4 | 7 | 500m | 1.8 | 7 | Yes | 25µ | $3.15 (LTC3534EDHC#PBF) |
| 48 | LTM4605 | 1 | 4.5 | 20 | 5 | 800m | 16 | Yes | 2.8m | $18.80 (LTM4605EV#PBF) |
| 49 | LTC3785 | 1 | 2.7 | 10 | 10 | 2.7 | 10 | No | 86µ | $3.56 (LTC3785EUF#PBF) |
| 50 | LTC3520 | 2 | 2.2 | 5.5 | 1 | 800m | 5.25 | Yes | 55µ | $3.50 (LTC3520EUF#PBF) |
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