Datasheet LTC3774 (Analog Devices) - 38
| Manufacturer | Analog Devices |
| Description | Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing |
| Pages / Page | 38 / 38 — TYPICAL APPLICATION. Dual Phase 1.2V/30A LTC3774 Converter with Hot Swap … |
| File Format / Size | PDF / 426 Kb |
| Document Language | English |
TYPICAL APPLICATION. Dual Phase 1.2V/30A LTC3774 Converter with Hot Swap Circuits On the Input of Each Phase
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LTC3774
TYPICAL APPLICATION Dual Phase 1.2V/30A LTC3774 Converter with Hot Swap Circuits On the Input of Each Phase
1N4448HWT VIN1 5V BIAS 1N4448HWT 1Ω V 37.4k IN2 2.2µF 2.2µF V CIN 10k 1µF V DRV PWM BOOT FDMF6820 0.22µF L4 V DrMOS IN PHASE 0.33µH 22µF D17 V 25V SWH CMHZ4690 COUTCER1 30.1k 1N4448HWT 2× CGND PGND 100µF 6.3V 2.4M CMHZ4690 2× 1N4448HWT HIZB1 2.2k HIZB1 PWM1 PWMEN1 4.64k RUN1, 2 1µF VIN SNSD1+ 0.22µF INTVCC LTC3774 SNS1– VIN1 0.007Ω FDMS86500DC 4.7µF FREQ SNSA1+ 0.22µF 931Ω PHSMD PGOOD1 5V V BIAS TK/SS1,2 PGOOD2 931Ω OUT 0.1µF 1.2V/30A 10k ITEMP1,2 SNSA2+ 0.22µF V CC1 TE1 OUT1 C V + + OUTCER1 OSNS1,2 SNS2– VIN 330µF ON1 SENSE1 GA FTMR1 10k 10k 37.4k 10V TO 14V V – OSNS1,2 SNSD2+ 0.22µF + 4.64k 2.5V 150µF 22µF CLS FAULT1 LTC4226 10k I 6× TH1,2 CLKOUT 64.9k 25V 25V GND FAULT2 I 2× LIM1,2 MODE/PLLIN ON2 FTMR2 3.01k HIZB2 PWM2 PWMEN2 GND 100pF 10k TE2 V CC2 SENSE2 GA OUT2 100pF 3.3nF 330pF 5V BIAS V 0.007Ω IN2 1Ω FDMS86500DC 2.2µF 2.2µF HIZB2 V CIN V DRV PWM BOOT FDMF6820 0.22µF L3 V DrMOS IN PHASE 0.33µH L1, L2: WÜRTH 744301033 22µF V 25V SWH COUTCER1,2: MURATA GRM31CR60J107ME39L C 2× CGND PGND OUTCER2 COUTBLK: SANYO 2R5TPE330M9 100µF 6.3V 2× 3774 TA05
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTM4630 Dual 18A or Single 36A DC/DC μModule Regulator 4.5V ≤ VIN ≤ 15V, 0.6V ≤ VOUT ≤ 1.8V LTM4630-1A ±1.5% Max VOUT Error Over Line, Load and Temp LTM4630-1B –1A Version: ±0.8% Max VOUT Error Over Line, Load and Temp LTC3887 Dual Output Multiphase Step-Down DC/DC Controller with 4.5V≤ VIN ≤ 24V, 0.5V ≤ VOUT ≤ 5.5V, Analog Control Loop, Digital Power System Management and ±0.5% Accuracy 70ms Start-Up, I2C/PMBus Interface with EEPROM and 16-bit ADC LTC3875 Dual, Multiphase Synchronous Controller with 4.75V≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 3.5V/5V Sub Milliohm DCR Sensing and Temperature Compensation Excellent Current Share when Paralleled LTC3861 Dual, Multiphase, Synchronous Step-Down DC/DC Controller Operates with Power Blocks, DrMOS or with Diff Amp and Tri-State Output Drive External MOSFETs 3V≤ VIN ≤ 24V LTC3855 Dual Output, 2-phase, Synchronous Step-Down DC/DC 4.5V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 12V Controller with Diff Amp and DCR Temperature Compensation PLL Fixed Frequency 250kHz to 770kHz, LTC3856 Single Output 2-Phase Synchronous Step-Down DC/DC 4.5V≤ VIN ≤ 38V, 0.8V≤ VOUT ≤ 5V Controller with Diff Amp and DCR Temperature Compensation PLL Fixed 250kHz to 770kHz Frequency LTC3838 Dual Output, 2-phase, Synchronous Step-Down DC/DC 4.5V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 5.5V Controller with Diff Amp and Controlled On-Time PLL, Up to 2MHz Switching Frequency LTC3869/ Dual Output, 2-Phase Synchronous Step-Down DC/DC 4V≤ VIN ≤ 38V, VOUT3 up to 12.5V LTC3869-2 Controller, with Accurate Current Share PLL Fixed 250kHz to 750kHz Frequency LTC4449 High Speed Synchronous N-Channel MOSFET Driver VIN up to 38V, 4V ≤ VCC ≤ 6.5V Adaptive Shoot-Through Protection, 2mm x 3mm DFN-8 3774fc 38 LT 0417 REV C • PRINTED IN USA www.linear.com/LTC3774 For more information www.linear.com/LTC3774 LINEAR TECHNOLOGY CORPORATION 2013 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL APPLICATION Dual Phase 1.2V/30A LTC3774 Converter with Hot Swap Circuits On the Input of Each Phase
1N4448HWT VIN1 5V BIAS 1N4448HWT 1Ω V 37.4k IN2 2.2µF 2.2µF V CIN 10k 1µF V DRV PWM BOOT FDMF6820 0.22µF L4 V DrMOS IN PHASE 0.33µH 22µF D17 V 25V SWH CMHZ4690 COUTCER1 30.1k 1N4448HWT 2× CGND PGND 100µF 6.3V 2.4M CMHZ4690 2× 1N4448HWT HIZB1 2.2k HIZB1 PWM1 PWMEN1 4.64k RUN1, 2 1µF VIN SNSD1+ 0.22µF INTVCC LTC3774 SNS1– VIN1 0.007Ω FDMS86500DC 4.7µF FREQ SNSA1+ 0.22µF 931Ω PHSMD PGOOD1 5V V BIAS TK/SS1,2 PGOOD2 931Ω OUT 0.1µF 1.2V/30A 10k ITEMP1,2 SNSA2+ 0.22µF V CC1 TE1 OUT1 C V + + OUTCER1 OSNS1,2 SNS2– VIN 330µF ON1 SENSE1 GA FTMR1 10k 10k 37.4k 10V TO 14V V – OSNS1,2 SNSD2+ 0.22µF + 4.64k 2.5V 150µF 22µF CLS FAULT1 LTC4226 10k I 6× TH1,2 CLKOUT 64.9k 25V 25V GND FAULT2 I 2× LIM1,2 MODE/PLLIN ON2 FTMR2 3.01k HIZB2 PWM2 PWMEN2 GND 100pF 10k TE2 V CC2 SENSE2 GA OUT2 100pF 3.3nF 330pF 5V BIAS V 0.007Ω IN2 1Ω FDMS86500DC 2.2µF 2.2µF HIZB2 V CIN V DRV PWM BOOT FDMF6820 0.22µF L3 V DrMOS IN PHASE 0.33µH L1, L2: WÜRTH 744301033 22µF V 25V SWH COUTCER1,2: MURATA GRM31CR60J107ME39L C 2× CGND PGND OUTCER2 COUTBLK: SANYO 2R5TPE330M9 100µF 6.3V 2× 3774 TA05
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTM4630 Dual 18A or Single 36A DC/DC μModule Regulator 4.5V ≤ VIN ≤ 15V, 0.6V ≤ VOUT ≤ 1.8V LTM4630-1A ±1.5% Max VOUT Error Over Line, Load and Temp LTM4630-1B –1A Version: ±0.8% Max VOUT Error Over Line, Load and Temp LTC3887 Dual Output Multiphase Step-Down DC/DC Controller with 4.5V≤ VIN ≤ 24V, 0.5V ≤ VOUT ≤ 5.5V, Analog Control Loop, Digital Power System Management and ±0.5% Accuracy 70ms Start-Up, I2C/PMBus Interface with EEPROM and 16-bit ADC LTC3875 Dual, Multiphase Synchronous Controller with 4.75V≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 3.5V/5V Sub Milliohm DCR Sensing and Temperature Compensation Excellent Current Share when Paralleled LTC3861 Dual, Multiphase, Synchronous Step-Down DC/DC Controller Operates with Power Blocks, DrMOS or with Diff Amp and Tri-State Output Drive External MOSFETs 3V≤ VIN ≤ 24V LTC3855 Dual Output, 2-phase, Synchronous Step-Down DC/DC 4.5V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 12V Controller with Diff Amp and DCR Temperature Compensation PLL Fixed Frequency 250kHz to 770kHz, LTC3856 Single Output 2-Phase Synchronous Step-Down DC/DC 4.5V≤ VIN ≤ 38V, 0.8V≤ VOUT ≤ 5V Controller with Diff Amp and DCR Temperature Compensation PLL Fixed 250kHz to 770kHz Frequency LTC3838 Dual Output, 2-phase, Synchronous Step-Down DC/DC 4.5V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 5.5V Controller with Diff Amp and Controlled On-Time PLL, Up to 2MHz Switching Frequency LTC3869/ Dual Output, 2-Phase Synchronous Step-Down DC/DC 4V≤ VIN ≤ 38V, VOUT3 up to 12.5V LTC3869-2 Controller, with Accurate Current Share PLL Fixed 250kHz to 750kHz Frequency LTC4449 High Speed Synchronous N-Channel MOSFET Driver VIN up to 38V, 4V ≤ VCC ≤ 6.5V Adaptive Shoot-Through Protection, 2mm x 3mm DFN-8 3774fc 38 LT 0417 REV C • PRINTED IN USA www.linear.com/LTC3774 For more information www.linear.com/LTC3774 LINEAR TECHNOLOGY CORPORATION 2013 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
