VOL 2 High Performance DC/DC Controllers LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS We provide complete power solutions with a full lineup of power management products. This brochure provides an overview of our high performance DC/DC switching regulator controllers for applications including datacom, telecom, industrial, automotive, medical, avionics and control systems. We make power design easier with our industry-leading field application engineering support; a broad selection of demonstration boards with schematics, layout files and parts lists; SwitcherCAD software for simulation, application notes and comprehensive ® technical documentation. Contents Topologies DC/DC Converter Topologies...............................................................................................................................................................................1 Step-Down (Buck) DC/DC Controllers Single Output Buck DC/DC Controllers VIN up to 24V .........................................................................................................................................2 Single Output Buck DC/DC Controllers VIN up to 38V .........................................................................................................................................3 Single Output Buck DC/DC Controllers VIN up to 60V/100V.................................................................................................................................4 ® PolyPhase Single Output DC/DC Controllers......................................................................................................................................................5 PolyPhase Multiple Output DC/DC Controllers.....................................................................................................................................................6 Step-Up (Boost), Buck-Boost, Sepic, Inverter and Flyback Controllers Boost DC/DC Controllers....................................................................................................................................................................................7 Synchronous Buck-Boost DC/DC Controllers......................................................................................................................................................8 SEPIC DC/DC Controllers....................................................................................................................................................................................9 Inverter DC/DC Controllers................................................................................................................................................................................ 10 Flyback Controllers............................................................................................................................................................................................ 11 Micropower, Multiple Topologies, DDR/QDR, Monitor, M argining and MOSFET Drivers Micropower DC/DC Controllers......................................................................................................................................................................... 12 Multiple Topology DC/DC Controllers................................................................................................................................................................. 13 DDR/QDR Memory Termination DC/DC Controllers........................................................................................................................................... 14 Digital Power System Management................................................................................................................................................................... 15 High Speed MOSFET Drivers............................................................................................................................................................................. 16 TOPOLOGIES DC/DC Converter Topologies Synchronous Step-Down (Buck) Converter Step-Down (Buck) Converter + VIN + + + + VIN VOUT CONTROL – CONTROL + VIN + VOUT – – – + VOUT < VIN More Efficient than a Standard Buck SEPIC Converter Synchronous Buck-Boost Converter + + + + + VIN VOUT – + + + CONTROL CONTROL VIN – VOUT – – VIN Above, Below or Equal to VOUT VIN Above, Below or Equal to VOUT; More Efficient than a SEPIC Synchronous Step-Up (Boost) Converter Step-Up (Boost) Converter + + VIN + + + + VIN VOUT CONTROL + + CONTROL – – – More Efficient than a Standard Boost VOUT > VIN Flyback Converter Inverter + + VIN CONTROL VOUT + VIN – CONTROL – + + + VOUT – + VOUT – – Isolated and Non-Isolated; High VOUT/VIN Ratios; Simple Digital Power Synchronous Buck Converter VIN CONTROL ADC PMBus/I2C EEPROM Digital Control, Telemetry and Fault Logging VOUT Converts Positive Input Voltage to Negative Output Voltage 1 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS Single Output Buck DC/DC Controllers Linear Technology’s single output buck step-down DC/DC controllers provide up to 96 percent efficient step-down conversion. Output voltages are as low as 0.6V with currents up to 60 amps. Features include synchronous or nonsynchronous operation, onboard MOSFET drivers, low quiescent current, tracking, tight reference voltage accuracy, optional sense resistor, current mode or voltage mode control, and selectable and/or synchronizable operating frequency. Linear offers several hundred buck controllers. Only a select few are listed below. For a complete list visit www.linear.com/LTC3852 or contact your local sales office. VIN up to 24V LTC3852 Features • Charge Pump Input Range: 2.7V to 5.5V • Integrated Charge Pump Provides 5V Gate Drive to Logic Level MOSFETs • RSENSE or DCR Current Sensing • ±1.25% Output Voltage Accuracy Over Temperature • Phase-Lockable Fixed Frequency: 250kHz to 750kHz LTC®3852 Low Voltage Synchronous Step-Down Schematic 100k PGO0D INTVCC VIN1 MODE/PLLIN TG FREQ/PLLFLTR SW 95.3k + INTVCC 1nF Actual Size Demo Board (DC1270A) VOUT 1.2V 20A ITH 12.1k 2.1k VIN2 0.1MF LTC3852 22µF BOOST TRACK/SS LTC3852 4.7µF GND2 SENSE RUN + C – C + GND1 20k 1% 0.1MF – SENSE VFB SHDN CHARGE PUMP 2.2µF 470µF ×2 BG 100pF OFF ON VIN 2.7V TO 5.5V 0.36µH 40.2k 1% VPUMP Actual Size Back Synchronizable Logic Level MOSFETs √ √ √ S8, SO-16, SSOP-16 √ √ 700µA SO-8, SSOP-16 √ √ 250kHZ to 2.25 mHZ 30mA 5x6 QFN-36 √ √ VOUT Range (V) IOUT(1) Max (A) Operating Frequency(2) IQ (SUPPLY) Package LTC3852 2.7 to 5.5 0.8 to 0.9VIN 25 250kHz to 750kHz 7mA 3x5 QFN-20 LT3740 2.2 to 22 0.8 to 0.77VIN 20 300kHz 2.5mA DFN-16 LTC3830/-1 3 to 8 1.26 to 0.91VIN 20 100kHz to 500kHz 700µA LTC3832/-1 3 to 8 0.6 to 0.91VIN 20 100kHz to 500kHz LTC3861 3 to 24 0.6 to 5 30 x 2 Current (I) or Voltage (V) Mode Control Tracking √ VIN Range (V) Programmable Soft-Start No RSENSE √ Part Number Power Good Signal Synchronous Rectification DR/MOS Power Block Compatible 2 √ √ I √ √ V √ √ V √ √ √ √ I √ I Low Quiescent Current LTC3772/B 2.75 to 9.8 0.8 to 0.9VIN 5 550kHz 40µA DFN-8, ThinSOT™ LTC3801/B 2.4 to 9.8 0.8 to VIN 5 550kHz 16µA ThinSOT LTC3808 2.75 to 9.8 0.6 to VIN 5 250kHz to 750kHz 105µA DFN-14, SSOP-16 √ √ √ √ I LTC3809/-1 2.75 to 9.8 0.6 to VIN 5 250kHz to 750kHz 105µA DFN-10, MSOP-10E √ √ √ √ I LTC3822 2.75 to 4.5 0.6 to 0.99VIN 20 300kHz/550kHz/750kHz 360µA DFN-10, MSOP-10 √ √ LTC3822-1 2.75 to 4.5 0.6 to 0.99VIN 20 300kHz/550kHz/750kHz 105µA DFN-12, SSOP-16 √ √ √ √ Notes (1) The maximum output current depends on the choice of external components (2) The operating frequency can be selected within the range indicated √ I I I √ I STEP-DOWN (BUCK) DC/DC CONTROLLERS Single Output Buck DC/DC Controllers LTC3866 VIN up to 38V Actual Size Demo Board (DC1829A) LTC3866 Features • Sub Milliohm DCR Current Sensing • Advanced Current Mode Control For Ultralow Jitter • High Efficiency: Up to 95% • Selectable Current Sensing Limit • Programmable DCR Temperature Compensation • ± 0.5% 0.6V Output Voltage Accuracy • Programmable Fixed Frequency 250kHz to 770kHz • High Speed Differential Remote Sense Amplifier Actual Size Back LTC3866 Sub-Milliohm Synchronous Step-Down Schematic 100k 0.1µF DIFFP DIFFN 30.1k PGND CLKOUT BG Part Number VIN Range (V) VOUT Range (V) IOUT(1) Max (A) Operating Frequency(2) IQ (SUPPLY) Package DR MOS/Power Block Compatible 470µF ×2 Number of Phases 4.64k Power Good Signal SGND 931Ω VOUT 1.5V 30A Synchronizable 220nF SNSA+ ILIM 0.33µH DCR = 0.32mΩ Tracking 1.5nF SW 0.1µF Sub Millie OHM DCR 220nF 4.7µF BOOST TG SNSD+ SNS– VIN 4.5V TO 20V Remote VO Sensing 20k 10k 220µF Synchronous Rectification 220pF FREQ MODE/PLLIN RUN PGOOD TK/SS ITEMP EXTVCC ITH VFB LTC3866 VIN INTVCC DIFFOUT LTC3866 4.5 to 38 0.6 to 3.5 40 250kHz to 770kHz 3.2mA 4x4 QFN-20/TSSOP-24 √ √ √ √ √ √ 1 √ LTC3854 4.5 to 38 0.8 to 5.5 25 400kHz 2mA 3x3 DFN/MSOP-12 √ √ LTC3851A/-1 4 to 38 0.8 to 5.5 25 250kHz to 750kHz 1mA QFN-16/SSOP-16 √ √ √ 1 LTC3775 4.5 to 38 0.6 to 0.8VIN 25 250kHz to 1MHz 3.5mA 3x3 QFN-12/MSOP-16E √ √ √ 1 LTC3878 4 to 38 0.8 to 0.9VIN 25 Constant On-Time 1.5mA SSOP-16 √ LTC3879 4 to 38 0.6 to 0.9VIN 25 Constant On-Time 1.5mA 3x3 QFN-12/MSOP-16E √ LTC3833 4.5 to 38 0.6 to 5.5 25 200kHz to 2MHz 2mA 3x4 QFN-20/TSSOP-20 √ √ √ LTC3867 4 to 38 0.6 to 14 25 200kHz to 1.2MHz 3.5mA 4x4 QFN-24 √ √ 1 1 √ √ 1 √ √ 1 √ √ √ 1 Low Quiescent Current LTC3835/-1 4 to 36 0.8 to 10 25 140kHz to 650kHz 80µA GN16/3x5 DFN, FE20/4x5QFN √ √ √ √ 1 LTC3834/-1 4 to 36 0.8 to 10 25 140kHz to 650kHz 30µA GN16/3x5 DFN, FE20/4x5QFN √ √ √ √ 1 Additional Features All parts have peak or valley current mode control and a shutdown (run) pin Notes (1) The maximum output current depends on the choice of external components (2) The operating frequency can be selected within the range indicated 3 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS Single Output Buck DC/DC Controllers VIN up to 60V/100V LTC3891 Actual Size Demo Board (DC1695A) LTC3891 Features • Wide V Range: 4V to 60V (65V Abs Max) IN • Low Operating IQ: 50μA • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V • RSENSE or DCR Current Sensing Actual Size Back LTC3891 High Voltage Synchronous Step-Down Schematic VIN 4V TO 60V 22µF VIN INTVCC 2.2µF LTC3891 TG FREQ 0.1µF 4.7µH SW 8mΩ VOUT 3.3V 150µF 5A BG SENSE+ SENSE VFB 100k INTVCC 31.6k Part Number VIN Range (V) VOUT Range (V) IOUT(1) Max (A) Operating Frequency(2) IQ (SUPPLY) Package No Rsense PGOOD 100k LTC3812-5 4.2 to 60 0.8 to 0.93 VIN 20 100kHz to 1MHz 3mA TSSOP-16E √ √ LTC3810-5 4.2 to 60 0.8 to 0.93 VIN 20 100kHz to 1MHz 3mA QFN-32 √ √ LTC3703-5 4.1 to 60 0.8 to 0.93 VIN 10 100kHz to 600kHz 1.7mA SSOP-16, TSSOP-28 √ √ LTC3810 6.2 to 100 0.8 to 0.93 VIN 20 100kHz to 1MHz 3mA SSOP-28 √ √ LTC3703 9.3 to 100 0.8 to 0.93 VIN 10 100kHz to 600kHz 1.7mA SSOP-16, TSSOP-28 √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ Current (I) or Voltage (V) Mode Control SGND Adjustable Turn-on Voltage TRACK/SS Power Good Signal 0.1µF Shut-down 100pF ItH Synchronizable 10k BOOST Tracking 41.2k 2200pF Synchronous Rectification 4 I √ I V √ √ I V Low Quiescent Current LTC3864 3.5 to 60 0.8 to VIN 5 50kHz to 850kHz 40µA 3x4 QFN-12, MSOP-12E LT®3844 4 to 60 1.23 to 36 5 100kHz to 500kHz 120µA TSSOP-16E LTC3891 4 to 60 0.8 to 24 20 50kHz to 900kHz 50µA 3x4 QFN-20, TSSOP-20E √ LT3845A 4 to 60 1.23 to 36 20 100kHz to 500kHz 120µA TSSOP-16E √ LT3800 4 to 60 1.23 to 36 20 200kHz 80µA TSSOP-16E √ LT3840 2.5 to 60 1.25 to 60 20 50kHz to 1MHz 220µA 4x6 QFN-38, TSSOP-28 √ Additional feature All parts have programmable soft-start Notes (1) The maximum output current depends on the choice of external components (2) The operating frequency can be selected within the range indicated √ √ √ √ √ √ √ √ √ √ I √ I √ I √ I √ I √ I STEP-DOWN (BUCK) DC/DC CONTROLLERS PolyPhase Single Output DC/DC Controllers PolyPhase operation clocks multiple DC/DC converter channels out-of-phase. This significantly reduces the input and output ripple currents, resulting in higher efficiency and lower EMI, as well as enabling smaller input and output filtering components. LTC3829 3-Phase Synchronous Step-Down Schematic INTVCC 4.7µF VIN BOOST1 BOOST2 BOOST3 SW3 SW2 SW1 5k TG1 SW1 BG1 PGND SENSE1+ SENSE1– TG2 SW2 BG2 100k 680pF 0.1µF 20k 20k VIN 22µF 6V TO 28V 35V ×3 + FREQ LTC3829 ITH SENSE2+ TK/SS SENSE2– SGND TG3 DIFFOUT SW3 BG3 VFB DIFFN SENSE3+ DIFFP SENSE3– LTC3829 Features • Nonlinear Control for Fast Transient Response • Phase-Lockable Fixed Frequency: 250kHz to 770kHz • True Remote Sense Differential Amplifier LTC3829 Actual Size Demo Board (DC1675A) VIN = 7V to 14V VOUT = 1.5V@120A 6-Phase Design with 2 LTC3829 ICs Part Number VIN Range (V) VOUT Range (V) IOUT(1) MAX (A) IQ (SUPPLY) Operating Frequency Package DCR Temp Compensation Programmable DCR Temperature Compensation COUT 470µF 4V ×4 EXTVCC RSENSE or DCR Current Sensing • + Synchronizable High Efficiency: Up to 95% • VIN 0.6µH 0.002Ω Tracking • Actual Size Back Remote Sense PWM, Stage Shedding™ or Burst Mode® Operation VOUT 1.2V 60A Maximum # of Phases ±0.75%, 0.6V Reference Accuracy • VIN 0.6µH 0.002Ω Number of Channels • 0.6µH 0.002Ω LTC3856 4.5 to 38 0.6 to 5.5 50 to 300 4mA 250kHz to 770kHz 5x5 QFN-32, TSSOP-38 2 12 √ √ √ √ √ LTC3839 4.5 to 38 0.6 to 5.5 40 to 240 3mA 250kHz to 2MHz 5x5 QFN-32 2 12 √ √ √ √ LTC3829 4.5 to 38 0.6 to 5 75 to 150 4mA 250kHz to 770kHz 5x6 QFN-36 3 6 √ √ √ √ Additional features (A) All parts have differential VO sensing, shut-down (run) pin, clock input, programmable soft-start and a power good signal (B) All parts are peak current mode controllers (C) Multiple parts can be paralleled for higher current applications Notes (1) The maximum output current depends on the choice of external components and number of phases (2) The operating frequency can be selected within the range indicated (3) The maximum 240A can only be developed by paralleling multiple phases √ 5 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS PolyPhase Multiple Output DC/DC Controllers Linear’s PolyPhase multiple output DC/DC controllers provide up to three high current outputs with up to 95 percent efficiency. Features include multiphase operation, onboard MOSFET drivers, synchronous or nonsynchronous rectification, low quiescent current, tracking, tight VREF accuracy and choice of current sense element. Other options include selectable, synchronizable switching frequency or constant on-time, tracking, along with DrMOS and power block compatibility. LTC3855 Features • Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise • High Efficiency: Up to 95% • RSENSE or DCR Current Sensing • Programmable DCR Temperature Compensation • ±0.75% 0.6V Output Voltage Accuracy • Phase-Lockable Fixed Frequency 250kHz to 770kHz • True Remote Sensing Differential Amplifier LTC3855 Dual Output 2-Phase Synchronous Step-Down Schematic 4.7µF + VIN TG1 0.1µF 0.56µH TG2 BOOST1 SW1 40.2k + 330µF ×2 470pF 20k 0.4µH BG2 LTC3855 SENSE1+ SENSE1– VOUT1 1.8V 15A 0.1µF BOOST2 SW2 BG1 PGND1 1µF INTVCC VIN 4.5V TO 20V 22µF PGND2 FREQ SENSE2+ SENSE2– 20k DIFFOUT VFB1 VFB2 ITH1 ITH2 TK/SS1 DIFFP SGND DIFFN TK/SS2 15k 0.1µF 470pF 7.5k 20k 100k 0.1µF VOUT2 1.2V 15A + 330µF ×2 LTC3855 Actual Size Demo Board (DC1441A) VOUT Range (V) IOUT(1) MAX (A) IQ (SUPPLY) Operating Frequency(2) Package Remote Sense Tracking Synchronizable EXTVCC LTC3855 4.5 to 38 0.6 to 3.3 (12.5) 25/25 3.5mA 250kHz to 770kHz 6x6 QFN-40, TSSOP-38 2 12 √ √ √ √ LTC3838 4.5 to 38 0.6 to 5.5 25/25 3mA 250kHz to 2MHz 5x7 QFN-38, TSSOP-38 2 12 √ √ √ √ LTC3861 3 to 24 0.6 to 5 40/40 30mA 250kHz to 2.25MHz 5x6 QFN-36 2 12 √ √ √ LTC3869 4 to 38 0.6 to 12.5 25/25 3mA 250kHz to 780kHz 4x5 QFN-28, SSOP-28 2 2 √ √ √ LTC3853 4.5 to 24 0.8 to 13.5 25/25/25 4.1mA 250kHz to 750kHz 6x6 QFN-40 3 12 √ PLL √ LTC3850 4.5 to 28 0.8 to 5.5 25/25 850µA 250kHz to 780kHz QFN-28, SSOP-28 2 2 √ PLL √ LTC3736/-1 2.75 to 9.8 0.6 to VIN 5/5 475µA 300kHz to 750kHz QFN-24, SSOP-24 2 2 √ PLL LT3742 3.5 to 30 0.8 to 30 5/5 5mA 500kHz QFN-24 2 2 √ LTC3736-2 2.75 to 9.8 0.6 to VIN 8/8 300µA 300kHz to 750kHz QFN-24, SSOP-24 2 2 √ PLL LTC3836 2.75 to 4.5 0.6 to 0.97VIN 10/10 450µA 250kHz to 850kHz SSOP-28, QFN-28 2 2 √ PLL LTC3859A 4.5 to 38 0.8 to 24 (Bucks), Up to 60 (Boost) 20/20/10 55µA 50kHz to 900kHz 5x7 QFN-38/TSSOP-38 3 3 √ PLL √ LTC3890/-1/-2 4 to 60 0.8 to 24 20/20 50µA 50kHz to 900kHz 5x5 QFN-32 2 12 √ PLL √ Additional features (A) All parts have a shut-down (run) pin and a power good signal (B) All parts are synchronous controllers, except the LT3742 (C) All parts have programmable soft-start except the LTC3736 Notes (1) The maximum output current depends on the choice of external components (2) The operating frequency can be selected within the range indicated DCR Temp Compensation VIN Range (V) DrMOS/Power Block Compatible Part Number Maximum # of Phases Actual Size Back Number of Outputs 6 √ √ S T E P - U P ( B O O S T ) , B U C K - B O O S T, S E P I C , I N V E R T E R A N D F LY B A C K C O N T R O L L E R S Boost DC/DC Controllers Linear Technology offers both synchronous and nonsynchronous boost controllers. Features include optional sense resistor, onboard LDO, 2-phase operation, high power gate drivers, programmable fixed switching frequency and low quiescent current. Efficiencies up to 97 percent can be achieved with synchronous operation. LTC3786 Features • Synchronous Operation For Highest Efficiency and Reduced Heat Dissipation LT3757 Features • Wide Input Voltage Range: 2.9V to 40V • Positive or Negative Output Voltage Programming with a Single Feedback Pin Wide VIN Range: 4.5V to 38V (40V Abs Max) and Operates Down to 2.5V After Start-Up • Output Voltages Up to 60V • Low Quiescent Current: 55μA LTC3786 High Power Synchronous Boost Schematic LT3757 Boost Schematic VIN 8V TO 16V • VIN 4.5V TO 24V 10µF 200k VIN SHDN/UVLO 43.2k VBIAS SENSE+ 10µH VOUT 24V 2A LT3757 SYNC GATE 41.2k 300kHz 226k SENSE RT SS VC + FBX GND INTVCC 16.2k 22k 0.1µF 6.8nF 4.7µF 47µF 0.1µF ×2 0.01Ω 15nF 10µF 8.66k 220pF 12.1k LTC3786 4mΩ PGOOD SENSE– PLLIN/MODE RUN FREQ TG 3.3µH SS SW ITH BOOST BG VFB INTVCC 0.1µF GND 232k 220µF 220µF VOUT 24V 5A 4.7µF LT3757 Actual Size Demo Board (DC1547A) LTC3786 Actual Size Demo Board (DC1641A) Part Number VIN Range (V) VOUT(1) Range (V) IOUT(1) MAX (A) Operating Frequency(2) Package Description LTC3786 4.5 to 38 Up to 60 10 50kHz to 900kHz 3x3 QFN-16, MSOP-16E Synchronous Rectification LT3757 2.9 to 40 3.3 and Higher 5 100kHz to 1MHz 3x3 DFN-10, MSOP-10 Simple Design LT3758 5.5 to 100 6 and Higher 5 100kHz to 1MHz 3x3 DFN-10, MSOP-10 Simple Design LT3759 1.6 to 42 2.2 and Higher 5 100kHz to 1MHz 3x3 DFN-10, MSOP-10 Simple Design LTC1871/-1 2.5 to 36 3.3 and Higher 5 50kHz to 1MHz MSOP-10 No RSENSE, Burst Mode Operation LTC1871-7 6 to 36 7 and Higher 5 50kHz to 1MHz MSOP-10 No RSENSE, Burst Mode Operation LTC3872 2.75 to 9.8 Up to 60V w/o RSENSE & Higher w/ RSENSE 5 550kHz SOT-23, 2x3 DFN-8 No RSENSE, Pulse-Skipping at Light Load LTC1872 2.5 to 9.8 3.3 and Higher 5 550kHz ThinSOT Burst Mode Operation LTC1700 0.9 to 5 1.5 to 6 5 400kHz to 750kHz MSOP-10 Synchronous Rectification LTC3813 7 to 0.9VOUT 8 to 100 10 100kHz to 1MHz SSOP-28 No RSENSE, Synchronous Rectification Dual Channel (Multiphase) LTC3862/-1/-2 4 to 36 5 and Higher 5(60) 75kHz to 500kHz 5x5 QFN-24, SSOP-24 Single Output, up to 12 Phases, Selectable Gate Drive Voltage LTC3787 4.5 to 38 Up to 60 10(120) 50kHz to 900kHz 4x5 QFN-28, T/SSOP-28 Single Output, up to 12 Phases, Synchronous Rectification LTC3788 4.5 to 38 Up to 60 10/10 50kHz to 900kHz 5x5 QFN-32, SSOP-28 Dual Output, up to 12 Phases, Synchronous Rectification LT3782A 6 to 40 7 and Higher 10/10 150kHz to 500kHz SSOP-28 2-Phase Operation Notes (1) The maximum voltage and current depend on the choice of external components (2) The frequency can be selected within the range indicated 7 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS Synchronous Buck-Boost DC/DC Controllers High performance 4-switch synchronous buck-boost controllers operate from an input voltage that is above, below or equal to the output voltage. These controllers utilize a single inductor and can deliver efficiencies up to 98 percent. LT8705 Features • Single Inductor Allows V Above, Below or Equal IN • Simplified Wide Voltage Range Synchronous Buck-Boost Schematic VIN Range 2.8V (Need EXTVCC > 6.4V) to 80V • VOUT Range: 1.3V to 80V • Quad N-Channel MOSFET Gate Drivers • Synchronous Rectification: Up to 98% Efficiency VIN 2.8V TO 80V + VOUT 1.3V TO 80V + 0.01Ω LT8705 50% Size Demo Board (DC1761A) SENSE+ SENSE– BG2 BG1 LT8705 TG1 TG2 VSENSE GND Actual Size Back 113k 8.06k LTC3789 Features • Single Inductor Architecture Allows VIN Above, Below or Equal to the Regulated VOUT • Programmable Input or Output Current • Wide VIN Range: 4V to 38V • 1% Output Voltage Accuracy: 0.8V < VOUT < 38V • Synchronous Rectification: Up to 98% Efficiency • Current Mode Control Simplified Synchronous Buck-Boost Schematic VIN 4V TO 38V + VOUT 0.8V TO 38V + 0.01Ω SENSE– SENSE+ BG2 BG1 LTC3789 TG1 TG2 VSENSE GND LTC3789 Actual Size Demo Board (DC1523A) 113k IOUT(1) MAX (A) Operating Frequency(2) Package LTC3785 2.7 to 10 2.7 to 10 10 100kHz to 1MHz QFN-24 √ LTC3780 4 to 36 0.8 to 30 10 200kHz to 400kHz 5X5 QFN-32, SSOP-24 LTC3789 4 to 38 0.8 to 38 10 200kHz to 600kHz 4X5 QFN-28, SSOP-28 LT3791-1 4.7 to 60 0 to 60 10 200kHZ to 700 kHZ TSSOP-38 LT8705 2.8 to 80 1.3 to 80 10 100kHz to 400kHz 5X7 QFN-38, TSSOP-38 Notes (1) The maximum voltage and current depend on the choice of external components (2) The frequency can be selected within the range indicated Battery Changing Capability VOUT Range (V) Input/Output Current Monitor VIN Range (V) Current (I) or Voltage (V) Mode Control Part Number Synchronizable 8.06k No Rsense 8 √ √ √ √ V PLL I I √ I S T E P - U P ( B O O S T ) , B U C K - B O O S T, S E P I C , I N V E R T E R A N D F LY B A C K C O N T R O L L E R S SEPIC DC/DC Controllers SEPIC converters operate from an input voltage that is above, below or equal to the output voltage and provides output short-circuit protection. The SEPIC provides a simpler solution as compared to synchronous buck-boost controllers, but has a lower efficiency, power density and maximum output current. All of Linear’s boost controllers can be designed into a SEPIC converter. Only a select list of parts is shown below. For a complete list visit www.linear.com/LT3759 or contact your local sales office. LT3759 Features • Wide V Range: 1.6V to 42V IN LT3759 Actual Size SEPIC Demo Board (DC1787A) • Positive or Negative Output Voltage Programming with a Single Feedback Pin • PGOOD Output Voltage Status Report LT3759 SEPIC Schematic VIN 2.5V TO 36V 4.7µF ×2 L1A 105k 4.7µF ×4 VIN GATE EN/UVLO 100k VOUT 12V 0.5A, 2.5V ≤ VIN ≤ 8V 2A, 8V < VIN ≤ 36V 118k LT3759 M1 L1B 10µF SENSE 5mΩ PGOOD DRIVE TIE TO GND IF NOT USED SYNC 105K RT SS VC 41.2k 200kHz 0.1µF + FBX GND INTVCC 7.5k 15.8K 4.7µF 22nF Part Number VIN Range (V) VOUT(1) MAX (V) Output Current(1) (A) Operating Frequency(2) LT3757 2.9 to 40 36 3 LT3758 5.5 to 100 75 3 LT3759 1.6 to 42 36 LTC1871/-1 2.5 to 36 LTC1871-7 6 to 36 75(1) 47µF ×4 NO Rsense IQ (SUPPLY) Shut-Down Current Package 100kHz to 1MHz 1.6mA <1µA 3x3 DFN-10/MSOP-10 100kHz to 1MHz 1.75mA <1µA 3x3 DFN-10/MSOP-10 3 100kHz to 1MHz 350µA <1µA 3x3 DFN-10/MSOP-10 30 3 50kHz to 1MHz √ 250µA <20µA MSOP-10 30 3 50kHz to 1MHz √ 250µA <20µA MSOP-10 LTC3805/-5 4.7 to 52 3 70kHz to 700kHz) 360µA <20µA 3x3 DFN-10/MSOP-10 LT3844 4 to 60 36 3 100kHz to 600kHz 120µA <15µA TSSOP-16E LT3724 7.4 to 60 36 3 200kHz 80µA <15µA TSSOP-16 LT1950 75(1) 52 3 100kHz to 500kHz 2.3mA <20µA SSOP-16 3 to Notes (1) The maximum voltage and current depend on the choice of external components (2) The frequency can be selected within the range indicated 9 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS Inverter DC/DC Controllers Inverting DC/DC controllers convert a positive input voltage to a negative output. Features include optional sense resistor, current mode control, integrated MOSFET driver, undervoltage lockout, selectable operating frequency, low quiescent current and wide input voltage range. LT3757 Features • Wide Input Voltage Range: 2.9V to 40V • LT3757 Actual Size Demo Board (DC1548A) Positive or Negative Output Voltage Programming with a Single Feedback Pin LT3757 Inverter Schematic VIN 5V TO 15V 47µF 16V VIN 105k L1 • 47µF 25V SHDN/UVLO L2 • 10 46.4k LT3757 SYNC GATE VOUT –5V 3A to 5A SENSE RT SS VC 41.2k 300kHz GND 0.006Ω 1W FBX INTVCC 9.1k 0.1µF 10nF 4.7µF 10V 100µF 6.3V, X5R L1, L2: COILTRONICS DRQ127-3R3 (*COUPLED INDUCTORS) Part Number VIN Range (V) VOUT(1) MAX (V) IOUT(1) MAX (A) Operating Frequency(2) IQ (SUPPLY) Package LT3757 2.9 to 40 -1.23 and Lower 5 100kHz to 1MHz 1.6mA 3x3 DFN-10, MSOP-10 LT3758 5.5 to 100 -1.23 and Lower 5 100kHz to 1MHz 1.75mA 3x3 DFN-10, MSOP-10 LT3759 1.6 to 42 -1.23 and Lower 5 100kHz to 1MHz 350µA 3x3 DFN-10, MSOP-10 LTC3704 2.5 to 36 -1.23 and Lower 5 50kHz to 1MHz 550µA MSOP-10 LT3724 4 to 60 -1.23 and Lower 10 200kHz 100µA TSSOP-16E LT3800 4 to 60 -1.23 and Lower 10 200kHz 80µA TSSOP-16E LT3844 4 to 60 -1.23 and Lower 10 100kHz to 600kHz 120µA TSSOP-16E -2.5V and Lower 10 100kHz to 500kHz 5.2mA SSOP-16 LT1952/-1 8 to 75(1) Notes (1) The maximum voltage and current depend on the choice of external components (2) The frequency can be selected within the range indicated S T E P - U P ( B O O S T ) , B U C K - B O O S T, S E P I C , I N V E R T E R A N D F LY B A C K C O N T R O L L E R S Flyback Controllers A flyback converter stores energy in a transformer during the on-time of the power switch and then delivers that energy to the output during the off-time. It is most commonly used when isolation is required from input to output, but can also be used in nonisolated applications. The output power of a flyback may vary from one watt to about 100 watts. A flyback design can operate over wide input voltage, typically up to a 4:1 input range. Its simple design makes it popular for lower power applications. LT3748 Features • 5V to 100V Input Voltage Range • 1.9A Average Gate Drive Source and Sink Current • Boundary Mode Operation • No Transformer Third Winding or Opto-Isolator Required for Regulation • LT3748 Flyback Schematic VOUT+ 12V 2A 4:1 VIN 36V TO 72V 10µF 412k EN/UVLO Primary-Side Winding Feedback Load Regulation 60.8µH VIN 243k RFB 15.4k 3.8µH 100µF VOUT– RREF 6.04k LT3748 LT3748 GATE TC Actual Size Demo Board (DC1557A) SENSE SS VC 56.2k 2nF GND INTVCC 10k 4.7µF 4700pF Part Number VIN Range (V) VOUT(1) Min (V) Output Current(1) (A) LT3748 5 to 100 Synchronous Operation 0.033Ω Operating Frequency(2) IQ (SUPPLY) Package Comments 1.23 5 Variable 1.3mA MSOP-16 (12) No Opto LT3798 90 to 305VAC(1) 1.23 5 Variable 70µA MSOP-16E Off-Line, Active PFC/No Opto LT3799 90 to 305VAC(1) 1.23 5 Variable 70µA MSOP-16E Off-Line, LED Driver w/ Active PFC LTC3803/-3 9.2 to 75(1) 0.8 5 200kHz or 300kHz 240µA SOT-23 Small Footprint LTC3803-5 5.7 to 75(1) 0.8 5 200kHz 240µA SOT-23 Small Footprint LTC3805 8.8 to 75(1) 0.8 5 70kHz to 700kHz 360µA DFN-10, MSOP-10 Synchronizable, Adj Current Limit LTC3805-5 4.5 to 75(1) 0.8 5 70kHz to 700kHz 360µA DFN-10, MSOP-10 Synchronizable, Adj Current Limit 75(1) 1.2 5 200kHz 360µA 8-Lead SOT, 2x3 DFN-8 Adjustable Current Limit 1.2 5 200kHz 360µA 8-Lead SOT, 2x3 DFN-8 Adjustable Current Limit LT1725 16 to 75(1) 1.25 5 50kHz to 250kHz 250µA SO-16, SSOP-16 No Opto LT1737 4.5 to 75(1) 1.23 5 50kHz to 250kHz 10mA SO-16, SSOP-16 No Opto LT3837 4.5 to 75(1) 1.23 12 √ 50kHz to 250kHz 6.4mA TSSOP-16 Higher Output Current LT3825 75(1) 1.23 12 √ 50kHz to 250kHz 400µA TSSOP-16 Higher Output Current LTC3873 8.8 to LTC3873-5 4 to 75(1) 16 to Notes (1) The maximum voltage and current depend on the choice of external components (2) The frequency can be selected within the range indicated 11 12 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS Micropower DC/DC Controllers Micropower controllers have a very low quiescent current that creates an extremely low power consuming DC/DC converter during no-load or light-load conditions. The parts listed below utilize Burst Mode operation and/or pulse-skipping to reduce light-load power consumption, preserving battery life during standby or idle mode. LTC3835 Features • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V • LTC3835 Low Quiescent Current Synchronous Step-Down Schematic CLKOUT PLLLPF RUN PGOOD Low Operating Quiescent Current: 80μA • OPTI-LOOP® Compensation Minimizes COUT • 1% Output Voltage Accuracy • Wide VIN Range: 4V to 36V Operation • Phase-Lockable Fixed Frequency 140kHz to 650kHz 0.01µF VIN 4V TO 36V 0.22µF BOOST 3.3µH 0.012Ω SW LTC3835 100pF 20k 10µF TG TRACK/SS ITH 330pF 33k VIN SGND INTVCC PLLIN/MODE EXTVCC VFB VOUT 3.3V 5A 150µF 4.7µF BG SENSE– 62.5k SENSE+ PGND LTC3835 Actual Size Demo Board (DC96713) VIN Range (V) VOUT Range (V) IOUT MAX(1) (A) LTC3864 3.5 to 60 0.8 to VIN 5 LTC3891 4 to 60 0.8 to 24 20 √ 50 kHZ to 900 kHZ LTC3834/-1 4 to 36 0.8 to 10V 20 √ LTC3835/-1 4 to 36 0.8 to 10V 20 LT3845A 4 to 60 1.23 to 36 20 LTC3801 2.5 to 9.8 0.8 to VIN LTC3772 2.75 to 9.8 LT3724 4 to 60 LT3800 LT3844 IQ (µA) (SUPPLY) Package Topology 40 3x4 DFN-12, MSOP-12E Buck 50 3 x 4 QFN-20, TSSOP 20 Buck 140kHz to 650kHz 30 FE20, 4x5 QFN GN16/3x5 QFN Buck √ 140kHz to 650kHz 80 FE20, 4x5 QFN GN16/3x5 QFN Buck √ 100kHz to 600kHz 120 TSSOP-16 Buck 5 550kHz 16 ThinSOT Buck 0.8 to VIN 5 550kHz 40 DFN-8, ThinSOT Buck 1.23 to 36 5 200kHz 80 TSSOP-16 Buck, Boost, SEPIC, Inverter 4 to 60 1.23 to 36 20 200kHz 80 TSSOP-16 Buck, Inverter 4 to 60 1.23 to 36 5 100kHz to 600kHz 120 TSSOP-16 Buck, Boost, SEPIC, Inverter LTC3872 2.75 to 9.8 Up to 60V w/o Rsense & Higher w/ Rsense 5 550kHz √ 250 ThinSOT, DFN-8 Boost LTC1871-7 6 to 36 1.23 and Higher 5 50kHz to 1MHz √ 250 MSOP-10 Boost, Flyback & SEPIC LTC1871/-1 2.5 to 36 1.23 and Higher 5 50kHz to 1MHz √ 250 MSOP-10 Boost, Flyback & SEPIC LT3739 1.6 to 42 1.23 and Higher 5 50kHz to 1MHz 350 3x3 DFN-10, MSOP-10 Boost, SEPIC, Inverter Part Number Symchronous Operation Operating Frequency(2) No Rsense Single Outputs 50kHz to 850kHz √ √ √ Dual/Triple Outputs LTC3890/-1/-2 4 to 60 0.8 to 24 20/20 √ 50 kHZ to 900 kHZ √ 50 5x5 QFN-32 Dual Buck LTC3857 4 to 38 0.8 to 24 25/25 √ 50kHz to 900kHz √ 50 5x5 QFN-32, SSOP-28 Dual Buck LTC3858 4 to 38 0.8 to 24 25/25 √ 50kHz to 900kHz √ 170 5x5 QFN-32, 4x5 QFN-28, SSOP-28 Dual Buck LTC3859AL 4.5 to 38 0.8 to 24/60 25/25/10 √ 50kHz to 900kHz √ 27 5x7 QFN-38, TSSOP-38 Buck/Buck/Boost LTC3826/-1 4 to 36 0.8 to 10 20/20 √ 140kHz to 650kHz √ 30 5x5 QFN-32/SSOP-28 Dual Buck Notes (1) The maximum output current depends on the choice of external components (2) The frequency can be selected within the range indicated M I C R O P O W E R , M U LT I P L E T O P O L O G I E S , D D R / Q D R , M O N I T O R , M A R G I N I N G A N D M O S F E T D R I V E R S Multiple Topology DC/DC Controllers Linear offers DC/DC controllers that can be used in multiple converter topologies including buck, boost, flyback, forward, inverter and SEPIC. Features include a wide input voltage range, low quiescent current, single and dual outputs, selectable operating frequency, optional sense resistor and onboard MOSFET gate driver. LT3758 Features • Wide Input Voltage Range: 5.5V to 100V VIN 8V TO 72V Positive or Negative Output Voltage Programming with a Single Feedback Pin 2.2µF ×2 154k VIN L1A SHDN/UVLO 32.4k LT3758 SYNC • 2.2µF x2 GATE L1B 0.012Ω RT SS VC 0.47µF FBX GND INTVCC 47µF ×2 15.8k 1% 10k 10nF LT3758 + 105k 1% • SENSE 41.2k 300kHz VOUT 12V 2A 10µF ×4 4.7µF VIN Range (V) VREF (V) IQ (µA) (SUPPLY) Operating Frequency(2) Package Flyback Inverter SEPIC LT3757 2.9 to 40 1.6/-0.8 1.6mA 100kHz to 1MHz 3x3 DFN-10, MSOP-10 √ √ √ √ LT3758 5.5 to 100 1.6/-0.8 1.75mA 100kHz to 1MHz 3x3 DFN-10, MSOP-10 √ √ √ √ LT3759 1.6 to 42 1.6/-0.8 350 100kHz to 1MHz 3x3 DFN-10, MSOP-10 √ √ √ LT1950 3 to 25 1.23 2.3mA 100kHz to 500kHz SSOP-16 √ √ LTC1871-7 6 to 36 1.23 250 50kHz to 1MHz MSOP-10 √ √ √ √ LTC1871/-1 2.5 to 36 1.23 250 50kHz to 1MHz MSOP-10 √ √ √ √ LT3724 7.5 to 60 1.23 80 200kHz TSSOP-16 √ √ LTC3703-5 4.1 to 60 0.8 1.7mA 100kHz to 600kHz SSOP-16, SSOP-28 √ √ LT3844 4 to 60 √ √ Buck Part Number Boost No Rsense L1A, L1B: COILTRONICS DRQ127-220 Actual Size Demo Board (DC1342A) Forward • LT3758 High Voltage SEPIC Schematic √ √ √ √ √ √ 1.23 120 100kHz to 600kHz TSSOP-16E LTC3803/-3 9 to 75(1) 0.8 240 200kHz ThinSOT √ √ √ √ LTC3803-5 5 to 75(1) 0.8 240 200kHz ThinSOT √ √ √ √ LTC3805 8.8 to 75(1) 0.8 360 70kHz to 700kHz DFN-10, MSOP-10 √ √ √ √ LTC3805-5 4.5 to 75(1) 0.8 360 70kHz to 700kHz DFN-10, MSOP-10 √ √ √ √ LTC3873 8.8 to 75(1) 1.2 360 200kHz ThinSOT, DFN-8 √ √ √ √ √ √ √ √ √ 75(1) LTC3873-5 4 to 1.2 360 200kHz ThinSOT, DFN-8 √ LT1952/-1 8 to 75(1) 1.23 5.2mA 100k to 500kHz SSOP-16 √ LTC3703 9.3 to 100 0.8 1.7mA 100kHz to 600kHz SSOP-16, SSOP-28 Notes (1) The maximum voltage depends on the choice of external components (2) The frequency can be selected within the range indicated √ √ √ 13 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS DDR/QDR Memory Termination DC/DC Controllers DDR (Double Data Rate)/QDR (Quad Data Rate) termination applications require that VOUT2 (VTT) is always 1/2 of VREF (which is usually VOUT1 or VDDQ). Features include dual and single outputs, onboard MOSFET drivers, synchronous rectification, low quiescent current, tracking, tight VREF accuracy, current mode or voltage mode control, spread spectrum, and no need for a current sense resistor. LTC3876 Features • Complete DDR Power Solution with VTT Reference • LTC3876 DDR Triple Output Synchronous Step-Down Schematic Wide VIN Range: 4.5V to 38V, VDDQ: 1V to 2.5V VIN 4.5V TO 14V • ±0.67% VDDQ Output Voltage Accuracy • VDDQ and VTT Termination Controllers • ±1.2% ±50mA Linear VTTR Reference Output • Controlled On-Time, Valley Current Mode Control • 180µF ×2 Synchronizable to External Clock • tON(MIN) = 30ns, tOFF(MIN) = 90ns 0.1µF 3.57k 0.47µH 1.5V, 20A VDDQ SENSE2– SENSE1– SENSE1+ SENSE2+ BOOST1 BOOST2 TG1 TG2 SW1 SW2 100µF 330µF ×2 1µF 4.7µF 30.1k INTVCC BG1 0.1µF 15k 0.1µF 3.57k VTT 0.75V ±10A 0.47µH DRVCC2 DRVCC1 Frequency Programmable from 200kHz to 2MHz • VIN 0.1µF 15k 330μF 100μF LTC3876 BG2 PGND 20k 100k 0.1µF 15k 1000pF 100k VOUTSENSE1+ VOUTSENSE1– PGOOD 1µF VTTRVCC VTTSNS TRACK/SS1 ITH1 RT SGND VTTR 2.2µF 1000pF ITH2 VTTR ±50mA 15k RUN LTC3876 Acual Size Demo Board (DC1631A) No Rsense Tracking Synchronizable Current (I) or Voltage (V) Mode Actual Size Back Spread Spectrum 14 √ √ √ I √ √ PLL I √ √ V √ √ V Part Number VIN Range (V) VDDQ Range (V) VTT Range (V) VTTR Range (V) IOUT(1) MAX (A) Operating Frequency(2) Package LTC3876 4.5 to 38 1.25 to 2.5 0.5 to 1.25 0.5 to 1.25 25/±25/±0.50 200kHz to 2MHz 5x7 QFN-38, TSSOP-38 LTC3776 2.75 to 9.8 0.6 to VIN VDDQ/2 NA 6/±6 300kHz to 750kHz QFN-24, SSOP-24 LTC3831 3 to 8 NA 1.25 to 0.91VIN NA ±15 100kHz to 500kHz SSOP-16 LTC3831-1 3 to 8 NA 0.40 to 0.91VIN NA ±15 100kHz to 500kHz SSOP-16 LTC3718 1.5 to 36 NA 0.75 to VREF/2 NA ±20 200kHz to 1.5MHz SSOP-24 √ I LTC3717/-1 4 to 36 NA 0.75 to VREF/2 NA ±20 200kHz to 1.5MHz SSOP-16 √ I Additional features (1) All parts have synchronous rectification and use the MOSFET RDS(ON) for current sense Notes (1) The maximum output current depends on the choice of external components (2) The operating frequency can be selected within the range indicated √ M I C R O P O W E R , M U LT I P L E T O P O L O G I E S , D D R / Q D R , M O N I T O R , M A R G I N I N G A N D M O S F E T D R I V E R S Digital Power System Management Digital power system management provides the capability to autonomously control and supervise dozens of voltages, as well as to provide accurate information about the power system using LTpowerPlayTM software. These controllers have onboard data acquisition system, nonvolatile memory and a PMBus interface for real-time reporting and control of point-of-load (POL) applications. Power management monitoring and control parameters include current, voltage, operating frequency and temperature. Power supply sequencing, margining and supervisory levels are easily programmed via the PMBus interface and provide POL fault detection reporting. LTC3880 Digital Control/Telemetry Synchronous Step-Down Schematic LTC3880 Features • PMBus/I2C Compliant Serial Interface VIN – Telemetry Read Back Includes VIN, IIN, 1µF 10µF VOUT, IOUT, Temperature and Faults VIN INTVCC – Programmable Voltage, Current Limit, TG0 TG1 0.1µF 0.1µF LTC3880 Digital Soft-Start/Stop, Sequencing, BOOST0 BOOST1 1.0µH V Margining, OV/UV and Frequency OUT0 SW0 SW1 3.3V Synchronization (250kHz to 1MHz) 15A 2.15k • • Integrated 16-Bit ADC • Internal EEPROM and Fault Logging • Integrated Powerful N-Channel MOSFET Gate Drivers • BG0 0.2µF ±0.5% Output Voltage Accuracy over Temperature 530µF + 10nF 2200pF 6.04k LTpowerPlay Configuration and Development Tool BG1 PGND *SOME DETAILS OMITTED FOR CLARITY ISENSEO+ ISENSEO– VSENSEO+ VSENSEO– TSNS0 TO/FROM OTHER LTC DEVICES WRITE PROTECT VOUT1 1.8V 20A 1.74k 0.2µF ISENSE1+ ISENSE1– VSENSE1 TSNS1 ITH1 ITHO SDA SCL ALERT RUN0 RUN1 PMBus INTERFACE 0.56µH GPIO0 GPIO1 VDD33 VDD25 SHARE_CLK 2200pF 4.99k 10nF + 530µF FAULT MANAGEMENT 1µF 1µF SGND WP LTC3880 Actual Size Demo Board (DC1590B-B) Part Number Function I2C-based PMBus Actual Size Back Number of Outputs VIN Range (V) I/O ADC DAC Control/Monitoring Functions Package 1 4.5 to 24 PMBus/SMBus/I2C 16-bit 12-bit VIN, lIN, VOUT, IOUT, Temperatures and Faults QFN-32 LTC3883 Step-Down Regulator with Compliant Serial Interfact LTC3880 Step-Down Regulator with I2C-based PMBus Compliant Serial Interfact 2 4.5 to 24 PMBus/SMBus/I2C 16-bit 12-bit VIN, VOUT, IOUT, Temperatures and Faults QFN-40 LTC2978 Octal, Digital Power-Supply Monitor, Supervisor, Sequencer, and Margin Controller 8 3.3 to 15 PMBus/SMBus/I2C 16-bit 10-bit VIN, VOUT, IOUT, Temperatures and Faults QFN-64 LTC2974 Quad, Digital Power-Supply Monitor, Supervisor, Sequencer, and Margin Controller 4 3.3 to 15 PMBus/SMBus/I2C 16-bit 10-bit VIN, VOUT, IOUT, Temperatures and Faults QFN-64 LTC2970(1) Dual Power Supply Monitor and Margining Controller with SMBus Compatible I2C Interface 1 5 to 15 SMBus/I2C 14-bit 8-bit VIN, VOUT, IOUT, Temperatures and Faults QFN-24 Note (1) All parts have onboard nonvolatile memory except LTC2970 15 16 LINEAR HIGH PERFORMANCE DC/DC CONTROLLERS High Speed MOSFET Drivers Linear Technology offers several types of high speed MOSFET drivers with features that include low and high side driving, single or dual outputs, inverting or noninverting, and a wide range of voltage applications. LTC4444 Features • Bootstrap Supply Voltage to 114V • Wide VCC Voltage: 7.2V to 13.5V • Adaptive Shoot-Through Protection • 2.5A Peak TG Pull-Up Current • 3A Peak BG Pull-Up Current • 1.2Ω TG Driver Pull-Down • 0.55Ω BG Driver Pull-Down • 5ns TG Fall Time Driving 1nF Load • 8ns TG Rise Time Driving 1nF Load • 3ns BG Fall Time Driving 1nF Load • 6ns BG Rise Time Driving 1nF Load LTC4444 Low Quiescent Current Synchronous Step-Down Regulator VIN 100V (ABS MAX) VCC 7.2V TO 13.5V BOOST VCC PWM1 (FROM CONTROLLER IC) TINP PWM2 (FROM CONTROLLER IC) BINP TG LTC4444 VOUT TS BG GND Part Number VCC Input Range (V) Maximum VIN Voltage (V) Maximum Output Current/Ohms Source/Sink Rise/Fall Time (ns) Prop Delay (ns) IQ (µA) (SUPPLY) Package Description LTC4442/-1 6 to 9.5 38 2.4A/5A 12/8/12/8(2) 20/12/20/12 730 MSOP-8E Synchronous LTC4444/-5 7.2/4.5 to 15 100 2.5A/2.5A 10/7/10/5(1) 30/30/18/15 350 MSOP-8E Synchronous LTC4446 7.2 to 13.5 100 2.5A/2.5A 8/5/6/3(1) 30/30/18/15 350 MSOP-8E Synchronous LTC4449 4 to 6.5 38 3.2A/2.4A 8/7/7/4(1) 14/13/13/11 300 2x3 DFN-8 Synchronous LTC4441 5 to 24 28 6A/6A 13/8(3) 30/36 250 MSOP-10, SO-8 Low-Side LTC4440 7.3 to 15 80, 100pk 2.4A/1.5Ω 10/7(1) 30/28 250 MSOP-10, SO-8 High Side, High Voltage LTC4440-5 3.65 to 15 60, 80pk 1.1A/1.85Ω 10/7(1) 35/33 200 MSOP-8E, SOT-23 High Side, High Voltage LTC1693-1 4.5 to 13.2 14V 1.4A/1.7A 17.5/16.5(1) 38/32 730 SO-8 Dual N-Chnl both Noninverting LTC1693-2 4.5 to 13.2 14V 1.4A/1.7A 17.5/16.5(1) 38/32 730 SO-8 Dual N-Chnl 1 Noninverting, 1 Inverting 38/32 730 MSOP-8 Single with Output pPolarity Select 38/32 360 MSOP-8 Single P-Chnl LTC1693-3 4.5 to 13.2 14V 1.4A/1.7A 17.5/16.5(1) LTC1693-5 4.5 to 13.2 14V 1.4A/1.7A 17.5/16.5(1) Notes (1) 1nF capacitive load (2) 3nF capacitive load (3) 4.7nF capacitive load Sa les Of f ice s N O RT H AMERICA Iowa Tel: (847) 925-0860 ASIA N O RTH E R N C A L IFO R N IA / N EVA D A Kansas Tel: (913) 829-8844 AU S T RAL IA / NEW ZEAL AN D Bay Area 720 Sycamore Dr. Milpitas, CA 95035 Tel: (408) 428-2050 Fax: (408) 432-6331 Minneapolis 7805 Telegraph Rd., Ste. 225 Bloomington, MN 55438 Tel: (952) 903-0605 Linear Technology Corporation 133 Alexander Street Crows Nest NSW 2065 Australia Tel: +61 (0)2 9432 7803 Fax: +61 (0)2 9439 2738 Sacramento / Nevada 2260 Douglas Blvd., Ste. 280 Roseville, CA 95661 Tel: (916) 787-5210 Fax: (916) 787-0110 PACIFIC N O RTH W E ST Denver 7007 Winchester Cir., Ste. 130 Boulder, CO 80301 Tel: (303) 926-0002 Fax: (303) 530-1477 Portland 5005 SW Meadows Rd., Ste. 410 Lake Oswego, OR 97035 Tel: (503) 520-9930 Fax: (503) 520-9929 Salt Lake City Tel: (801) 731-8008 Seattle 2018 156th Ave. NE, Ste. 100 Bellevue, WA 98007 Tel: (425) 748-5010 Fax: (425) 748-5009 SOU THW E ST A R E A Los Angeles 11300 W. 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