ltm4616 Linear Technology Corporation, ltm4616 Datasheet
ltm4616
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ltm4616 Summary of contents
Page 1
... Fault protection features include overvoltage protection, overcurrent protection and thermal shutdown. The power module is offered in a space saving and thermally enhanced 15mm × 15mm × 2.82mm LGA package. The LTM4616 is Pb-free and RoHS compliant. Different Combinations of Input and Output Number of Inputs ...
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... IN1 PART MARKING* PACKAGE DESCRIPTION LTM4616V 144-Lead (15mm × 15mm × 2.82mm) LGA LTM4616V 144-Lead (15mm × 15mm × 2.82mm) LGA http://www.linear.com/leadfree/ http://www.linear.com/packaging/ The denotes the specifi cations which apply over the –40°C to 125°C ● ...
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... OUT OUT C = 100μF OUT V = 2.375V 1.5V IN OUT V = 3.3V 1.5V IN OUT 1.5V IN OUT 1.5V 2.375V to 5.5V OUT OUT IN RUN Rising RUN Falling RUN = V IN RUN = 0V LTM4616 MIN TYP MAX 400 IN 1.15 55 450 IN 1 3.75 4.5 2. ● 0.1 0.25 OUT ● 0.3 0.5 ● 0.3 0 ...
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... MGN = 0V, BSEL = V IN MGN = 0V, BSEL = Float controls. The LTM4616I is guaranteed to meet specifi cations over the full internal operating temperature range. Note that the maximum ambient temperature is determined by specifi c operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors ...
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... X5R, 470μF 4V POSCAP OUT 5.5 Load Transient Response I LOAD 1A/DIV V OUT 50mV/DIV 20μs/DIV 1.5V OUT 2.5A/μs STEP × 100μF X5R, 470μF 4V POSCAP OUT LTM4616 Specifi Each Channel Step-Down Ratio IN OUT 4 OUT V = 1.2V 3.5 OUT V = 1.5V OUT V = 1.8V 3.0 ...
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... LTM4616 TYPICAL PERFORMANCE CHARACTERISTICS Start-Up V OUT 0.5V/DIV V IN 2V/DIV 4616 G13 50μs/DIV 1.5V OUT C = 100μF NO LOAD AND 8A LOAD OUT (DEFAULT 100μs SOFT-START) 2.5V Output Current 3.0 2.5 2.0 1.5 1.0 0 OUTPUT CURRENT (A) 4616 G16 PIN FUNCTIONS (BANK1 and BANK2); (F1-F4, E1-E4, C1-C2, ...
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... CLKOUT1 and CLKOUT2 (F7 and M7): Output Clock Signal for PolyPhase Operation. The phase of CLKOUT is determined by the state of the PHMODE pin. PolyPhase is a registered trademark of Linear Technology Corporation. LTM4616 . If TRACK IN , then the TRACK pin’s voltage needs to IN ® ...
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... LOOKING THROUGH COMPONENT INTERNAL FILTER M1 POWER CONTROL M2 INTERNAL COMP INTERNAL FILTER INTERNAL FILTER M3 POWER CONTROL M4 INTERNAL COMP INTERNAL FILTER Figure 1. Simplifi ed LTM4616 Block Diagram GND2 SW2, I/O & CONTROL V OUT1 GND1 12 4616 F01 V IN1 3V TO 5.5V + 10μF 10μF 10μF C IN1 PGND1 SW1 L ...
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... phases can be cascaded to run simultaneously with respect to each other by programming the PHMODE pin to different levels. The LTM4616 has clock in and clock out for poly phasing multiple devices or frequency synchronization. High effi ciency at light loads can be accomplished with selectable Burst Mode operation using the MODE pin ...
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... V Step-Down Ratios IN OUT There are restrictions in the maximum V down ratio that can be achieved for a given input voltage. Each output of the LTM4616 is 100% duty cycle, but the minimum drop out is still shown as a function IN OUT of its load current. For 5V input, all outputs can deliver 8A ...
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... None None 5 Burst Mode Operation The LTM4616 is capable of Burst Mode operation on each regulator in which the power MOSFETs operate intermit- tently based on load demand, thus saving quiescent current. For applications where maximizing the effi ciency at very light loads is a high priority, Burst Mode opera- tion should be applied ...
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... LTM4616 to lock onto CLKIN’s phase as well. The CLKOUT signal can be connected to the CLKIN pin of the following LTM4616 stage to line up both the frequency and the phase of the entire system. Tying the PHMODE pin to SV (fl ...
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... To reduce this noise, the LTM4616 can run in spread spectrum operation by tying the CLKIN pin spread spectrum operation, the LTM4616’s internal oscillator is designed to produce a clock pulse whose period is random on a cycle-by-cycle basis but fi ...
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... The master regulator’s output is divided down with an external resistor divider that is the same as the slave regulator’s feedback divider to implement coincident tracking. The LTM4616 uses an accurate 10k resistor internally for the top feedback resistor. Figure 5 shows an example of coincident tracking: ...
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... FOR TRACK1: 1. TIE TO VIN TO DISABLE TRACK WITH DEFAULT 100μs SOFT START 2. APPLY A CONTROL RAMP WITH RSR AND CSR TIED APPLY AN EXTERNAL TRACKING RAMP DIRECTLY Figure 5. Dual Outputs (3.3V and 1.5V) with Tracking LTM4616 can be solved for when equal to 4.87k. TA ...
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... Figures 9 to16 for calculating an approximate θ resistance for the LTM4616 with various heatsinking and airfl ow conditions. Both LTM4616 outputs are placed in parallel for a total output current of 16A, and the power loss curves are plotted for specifi c output voltages up to 16A ...
Page 17
... Tables 4 and 5 are closely accurate. As the load currents go below the 3A level on each chan- nel the thermal resistance starts to increase due to the reduced power loss on the board. The approximate thermal resistance values for these lower currents is 15°C/W. LTM4616 ...
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... Figure 8 400 Part No: LTN20069 Part No: 375424B000346 Layout Checklist/Example The high integration of LTM4616 makes the PCB board IN layout very simple and easy. However, to optimize its electrical and thermal performance, some layout con- siderations are still necessary. • Use large PCB copper areas for high current paths, ...
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... H G CONTROL1 & IN2 GND2 CONTROL2 LTM4616 TOP VIEW Figure 17. Recommended PCB Layout CLKIN1 SW1 CLKIN1 CLKOUT1 CLKIN2 CLKOUT2 V IN1 SV IN1 RUN1 PLLLPF1 MODE1 PHMODE1 TRACK1 LTM4616 V IN2 SV IN2 RUN2 PLLLPF2 MODE2 ...
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... 5. 10μF SV RUN RUN1 ENABLE PLLLPF1 MODE1 PHMODE1 TRACK1 V 10μF SV RUN2 PLLLPF2 MODE2 PHMODE2 TRACK2 Figure 19. LTM4616 Two Outputs Parallel, 1.5V at 16A Design 22μF SV SHDNB RUN1 PLLLPF1 100k MODE1 PHMODE1 PGOOD2 TRACK1 V SV RUN2 PLLLPF2 100k MODE2 ...
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... FB1 ITH1 ITHM1 PGOOD1 BSEL1 MGN1 LTM4616 V OUT2 FB2 ITH2 ITHM2 PGOOD2 BSEL2 MGN2 SW2 SGND1 GND1 SGND2 GND2 4616 F21 Figure 21. Four Phase in Parallel, 1.2V at 32A LTM4616 V OUT 1.2V AT 32A + C1 470μF 2.47k 6.3V SANYO POSCAP 10mΩ 470μF 6. 470μF 6. 22μ ...
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... RUN2 PLLLPF2 MODE2 PHMODE2 TRACK2 SW2 SGND1 GND1 SGND2 GND2 SW1 CLKIN1 CLKOUT1 CLKIN2 CLKOUT2 V IN1 SV IN1 RUN1 PLLLPF1 MODE1 PHMODE1 TRACK1 LTM4616 V IN2 SV IN2 RUN2 PLLLPF2 MODE2 PHMODE2 TRACK2 SW2 SGND1 GND1 SGND2 GND2 V OUT1 V OUT1 3.3V/7A FB1 100μF ITH1 2 ...
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... LGA Package 144-Lead (15mm × 15mm × 2.82mm) (Reference LTC DWG # 05-08-1816 Rev 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 LTM4616 4616f 23 ...
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... LTM4616 PACKAGE DESCRIPTION PIN NAME A1 GND1 A2 GND1 A3 GND1 A4 GND1 A5 GND1 A6 BSEL1 A7 CLKIN1 A8 MODE1 A9 PHMODE1 A10 MGN1 A11 PGOOD1 A12 GND1 PIN NAME G1 GND2 G2 GND2 G3 GND2 G4 GND2 G5 GND2 G6 BSEL2 G7 CLKIN2 G8 MODE2 G9 PHMODE2 G10 MGN2 G11 PGOOD2 G12 GND2 RELATED PARTS PART NUMBER ...