ltm4619 Linear Technology Corporation, ltm4619 Datasheet
ltm4619
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ltm4619 Summary of contents
Page 1
... DC/DC power supply. Included in the package are the switching controller, power FETs, inductor, and all support components. Operating over input voltage ranges of 4.5V to 26.5V, the LTM4619 supports two outputs with Range voltage ranges of 0.8V to 5V, each set by a single external OUT resistor. Its high effi ...
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... PART MARKING* PACKAGE DESCRIPTION 144-Lead (15mm × 15mm × 2.8mm) LGA LTM4619V 144-Lead (15mm × 15mm × 2.8mm) LGA LTM4619V http://www.linear.com/leadfree/ http://www.linear.com/packaging/ l The denotes the specifi cations which apply over the full internal = 25° 12V. Per typical application in Figure 18. Specifi ...
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... Load 50 Full Load C = 100μF X5R Ceramic,V = 2.5V 12V OUT OUT 100μF X5R Ceramic, OUT 2.5V IN OUT V = 26.5V 2.5V IN OUT 2.5V OUT OUT 2.5V TK/SS OUT In Dropout (Note 4) (Note 4) LTM4619 MIN TYP MAX UNITS 0. 0.97 0.480 4.8 5 5.2 l 4.5 4 0.15 0.3 l 0.25 0.5 0.15 0.3 l 0.25 0.5 l 0.6 ...
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... Specifi cations over the full –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4619I is guaranteed to meet specifi cations over the full TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current with 500kHz for 0 ...
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... V OUT 1V/DIV I IN 0.5A/DIV 4619 G10 = 12V, V OUT 22μF 10V, OUT AND 1 100μF 6.3V CERAMIC CAPs LTM4619 (Refer to Figures 18 and 19) 2.5V Output Transient Response I OUT 1A/DIV V OUT 50mV/DIV 4619 G05 100μs/DIV 6V 2.5V AT 2A/μs LOAD STEP IN OUT f = 780kHz C 2 22μ ...
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... LTM4619 PIN FUNCTIONS V (J1 to J3, J10 to J12 K4 K12 L5 L12 M12): Power Input Pins. Apply input voltage between these pins and PGND pins. Recommend placing input decoupling capacitance directly between V pins and PGND pins. For V < 5.5, tie V IN together ...
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... POWER COMP CONTROL M3 M4 INTERNAL COMP INTERNAL FILTER *USE EXTV FOR V ≤ 5.5V, OR TIE V AND EXTV TOGETHER FOR Figure 1. Simplifi ed LTM4619 Block Diagram T = 25°C. Use Figure 1 confi guration. A CONDITIONS = 3.3V 4A OUT2 OUT1 OUT2 = 3.3V OUT2 OUT1 I ...
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... TK/SS pin is used for programming the output voltage ramp and voltage tracking during start-up. See the Applications Information section. The LTM4619 is internally compensated to be stable over all operating conditions. The Linear Technology μModule Power Design Tool will be provided for transient and stability analysis. The V ...
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... SET Input Capacitors The LTM4619 module should be connected to a low AC- impedance DC source. Two 1.5μF input ceramic capacitors are included inside the module. Additional input capacitors are needed if a large load is required up to the 4A level. A 47μF to 100μF surface mount aluminum electrolytic bulk capacitor can be used for more input bulk capacitance ...
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... MODE/PLLIN pin to INTV Burst Mode operation, fl oat the MODE/PLLIN pin. Frequency Synchronization A phase-lock loop is available on the LTM4619 to synchro- nize the internal clock to an external clock source connected on the MODE/PLLIN pin. The clock high level needs to be higher than 1.6V and the clock low level needs to be lower than 1V ...
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... APPLICATIONS INFORMATION Soft-Start and Tracking The LTM4619 has the ability to either soft-start by itself with a capacitor or track the output of another channel or external supply. When one particular channel is confi gured to soft-start by itself, a capacitor should be connected to its TK/SS pin. This channel is in the shutdown state if its RUN pin voltage is below 1 ...
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... LTM4619 APPLICATIONS INFORMATION 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 Figure 5. Normalized Input RMS Ripple Current vs Duty Factor for One to Six Phases 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 Figure 6. Normalized Output Ripple Current vs Duty Cycle, Dlr = V 12 1-PHASE 2-PHASE 3-PHASE 4-PHASE 6-PHASE DUTY FACTOR ( OUT IN DUTY CYCLE ( OUT IN 4619 F05 1-PHASE 2-PHASE ...
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... N-channel MOSFET. The MOSFET turns on and pulls the PGOOD pin low when either V ±7.5% of the 0.8V reference voltage. The PGOOD pin is also pulled low when either RUN pin is below 1.2V or when the LTM4619 is in the soft-start or tracking phase. When the V pin voltage is within the ±7.5% requirement, the FB MOSFET is turned off and the pin is allowed to be pulled external resistor to a source ...
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... The INTV is the internal 5V regulator that powers the CC LTM4619 internal circuitry and drives the power MOSFETs. The input voltage of the LTM4619 must above for the INTV to regulate to the proper 5V level due to CC the internal LDO dropout from the input voltage. For ap- ...
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... Figure 8 400 Figure 8 0 Figure 8 200 Figure 8 400 PART NUMBER 375424B00034G 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 6V LOSS 12V LOSS 4619 F07 Figure 8. Power Loss at 3.3V Output LTM4619 Θ HEATSINK (°C/W) JA none 12.8 none 9.0 none 8.0 BGA Heatsink 11.9 BGA Heatsink 8.4 BGA Heatsink 7.4 Θ HEATSINK (°C/W) JA none 13.4 none 9.6 none 8.5 BGA Heatsink 12 ...
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... LTM4619 APPLICATIONS INFORMATION AMBIENT TEMPERATURE (°C) Figure 9. 6V without Heat Sink 12V TO 1.5V 0LFM IN OUT 1 12V TO 1.5V 200LFM IN OUT 12V TO 1.5V 400LFM IN OUT 100 105 110 AMBIENT TEMPERATURE (°C) 4619 F11 Figure 11 ...
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... APPLICATIONS INFORMATION Layout Checklist/Example The high integration of LTM4619 makes the PCB board layout very simple and easy. However, to optimize its electri- cal and thermal performance, some layout considerations are still necessary. • Use large PCB copper areas for high current path, includ- ...
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... Figure 18. Typical 4.5V to 26.5V Input, 5V and 3.3V Outputs at 4A Design 18 MODE/PLLIN INTV CC V FREQ/PLLFLTR IN 11. FB1 FB2 C1 COMP1 COMP2 22pF V V OUT1 OUT2 LTM4619 TK/SS1 TK/SS2 0.1μF RUN1 RUN2 100k PGOOD EXTV CC CC SGND PGND PGOOD 4619 F18 *R1 IS NEEDED FOR 4.5V < V 19.1k C2 22pF V OUT2 3 ...
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... FREQ/PLLFLTR IN 121k V V FB1 FB2 C1 COMP1 COMP2 22pF V V OUT1 OUT2 LTM4619 TK/SS1 TK/SS2 0.1μF RUN1 RUN2 100k PGOOD CC SGND PGND 4619 F19 PGOOD LTM4619 EXTERNAL 5V SUPPLY FOR INPUT VOLTAGE BELOW 5. 3.83k 1.21k 68.1k C2 22pF V OUT2 1.5V/4A C OUT2 100μF 2 0.1μF 4619f 19 ...
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... LTM4619 TYPICAL APPLICATIONS 26.5V Figure 20. Output Paralleled LTM4619 Module for 5V Output at 8A Design 20 MODE/PLLIN EXTV INTV FREQ/PLLFLTR COMP1 V 10μF FB1 COMP2 V FB2 TK/SS1 V LTM4619 OUT1 TK/SS2 V OUT2 C3 PGOOD RUN2 0.1μF RUN1 SGND PGND 4619 F20 C1 51pF R1 5.76k ...
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... ON/OFF CLOCK SYNC, 90° PHASE MODE/PLLIN FB1 R7 C12 COMP1 28k 22pF LTM4619 V OUT1 V C8 OUT1 TK/SS1 22μF R10 RUN1 60.4k PGOOD R11 SGND 28k LTM4619 INTV CC FREQ/PLLFLTR V FB2 R4 C11 COMP2 19.1k 22pF V OUT2 + V C4 OUT1 TK/SS2 22μF R1 RUN2 60.4k EXTV CC R2 PGND 19.1k INTV ...
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... LTM4619 PACKAGE DESCRIPTION PIN NAME A1 V OUT2 A2 V OUT2 A3 V OUT2 A4 GND A5 GND A6 GND A7 GND A8 GND A9 GND A10 V OUT1 A11 V OUT1 A12 V OUT1 B1 V OUT2 B2 V OUT2 B3 V OUT2 B4 GND B5 GND B6 GND B7 GND B8 GND B9 GND B10 V OUT1 B11 V OUT1 B12 V OUT1 ...
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... LGA Package 144-Lead (15mm × 15mm × 2.82mm) (Reference LTC DWG # 05-08-1816 bbb 6.9850 5.7150 4.4450 3.1750 1.9050 0.6350 0.0000 0.6350 1.9050 3.1750 4.4450 5.7150 6.9850 LTM4619 4619f 23 ...
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... LTM4619 PACKAGE PHOTOGRAPH RELATED PARTS PART NUMBER DESCRIPTION LTM4614 Dual 4A Low V DC/DC μModule IN LTM4615 Triple Low V DC/DC μModule IN LTM4616 Dual 8A Low V DC/DC μModule IN 24 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● COMMENTS 2.375V ≤ V ≤ 5.5V; 0.8V ≤ OUT Two 4A Outputs and One 1.5A ...