LTM4601/ LINER [Linear Technology], LTM4601/ Datasheet
LTM4601/
Related parts for LTM4601/
LTM4601/ Summary of contents
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FeaTures Complete Standalone Power Supply n ±1.5% Output Voltage Regulation n 2.7V to 5.5V Input Voltage Range n 8A DC, 10A Peak Output Current n 0. Output n Output Voltage Tracking and Margining n Power Good Tracking ...
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LTM4608 absoluTe MaxiMuM raTings (Note ...................................................... –0. CLKOUT ....................................................... –0. PGOOD, PLLLPF, CLKIN, PHMODE, MODE .. –0. RUN, FB, TRACK, MGN, BSEL ..... –0.3V ...
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T SYMBOL PARAMETER I Input Supply Bias Current Q(VIN) I Input Supply Current S(VIN) Output Specifications I Output Continuous Current Range OUT(DC) (See Output Current Derating Curves for Different V ...
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LTM4608 elecTrical characTerisTics temperature range (Note 2), otherwise specifications are at T SYMBOL PARAMETER TRACK Tracking Threshold (Rising) Tracking Threshold (Falling) Tracking Disable Threshold R Resistor Between V and FB FBHI OUT Pins ΔV PGOOD Range PGOOD %Margining Output Voltage ...
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Typical perForMance characTerisTics Efficiency vs Load Current 100 CONTINUOUS MODE 1.2V IN OUT 5V 1.5V IN OUT 5V 1. OUT 5V 2.5V IN OUT 5V 3.3V IN OUT ...
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LTM4608 Typical perForMance characTerisTics Load Transient Response 2A/DIV 20mV/DIV 4608 G10 20µs/DIV 1.8V OUT 2.5A/µs STEP C = 100µF X5R OUT C1 = NONE NONE FROM FIGURE 18 Start-Up V OUT 0.5V/DIV ...
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FuncTions V (C1, C8, C9, D1, D3-D5, D7-D9 and E8): Power Input IN Pins. Apply input voltage between these pins and GND pins. Recommend placing input decoupling capacitance directly between V pins and GND pins (C10-C11, D10-D11, ...
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LTM4608 pin FuncTions FB (E7): The Negative Input of the Error Amplifier. Internally, this pin is connected to V with a 10k precision resistor. OUT Different output voltages can be programmed with an ad- ditional resistor between FB and GND ...
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DiagraM SV IN TRACK MGN BSEL PGOOD MODE RUN CLKIN CLKOUT PHMODE I TH INTERNAL COMP PLLLPF INTERNAL FILTER I THM SGND Table 1. Decoupling Requirements 25°C, Block Diagram Configuration. A SYMBOL PARAMETER C External Input ...
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LTM4608 operaTion Current mode control provides cycle-by-cycle fast current limit and thermal shutdown in an overcurrent condition. Internal overvoltage and undervoltage comparators pull the open-drain PGOOD output low if the output feedback voltage exits a ±10% window around the regulation ...
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Without considering the inductor current ripple, the RMS current of the input capacitor can be estimated as: I OUT(MAX • D • 1– D CIN(RMS) η% In the above equation, η% is the estimated efficiency ...
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LTM4608 applicaTions inForMaTion Table 3. Output Voltage Response Versus Component Matrix (Refer to Figure 18 Load Step TYPICAL MEASURED VALUES C VENDORS VALUE PART NUMBER OUT1 TDK 22µF, 6.3V C3216X7S0J226M Murata 22µF, 16V GRM31CR61C226KE15L TDK 100µF, 6.3V ...
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The CLKIN pin allows the LTC4608 to synchronize to an external clock (between 0.75MHz and 2.25MHz) and the internal phase-locked loop allows the LTM4608 to lock onto ...
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LTM4608 applicaTions inForMaTion The LTM4608 device is an inherently current mode con- trolled device. Parallel modules will have very good current sharing. This will balance the thermals on the design. Tie the I pins of each LTM4608 together to share ...
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Spread spectrum operation is disabled if CLKIN is tied to ground or if it’s driven by an external frequency synchronization signal. A capacitor value of 0.01µF must be placed from the PLLLPF pin to ground to ...
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LTM4608 applicaTions inForMaTion The track pin of the master can be controlled by an external ramp and C in Figure 5 referenced ramp time can be programmed using equation: ...
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Slope Compensation The module has already been internally compensated for all output voltages. Table 3 is provided for most application requirements. A spice model will be provided for other control loop optimization. For single module operation, connect I ...
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LTM4608 applicaTions inForMaTion 400LFM 1 200LFM 0LFM AMBIENT TEMPERATURE (°C) Figure 9. No Heat Sink with 3. ...
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AMBIENT TEMPERATURE (°C) Figure 15. No Heat Sink with 5V Table 4. 1.5V Output DERATING CURVE V (V) IN ...
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LTM4608 applicaTions inForMaTion Safety Considerations The LTM4608 modules do not provide isolation from There is no internal fuse. If required, a slow blow OUT fuse with a rating twice the maximum input current needs to be ...
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Typical applicaTions 5. 10µF MODE PHMODE 5.5V TRACK C2 10µF Figure 19. Two LTM4608s in Parallel, 1.5V at 16A Design. See Also Dual 8A per Channel LTM4616 CLKIN CLKIN V ...
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LTM4608 Typical applicaTions D1 MMSD4148 SHDN D2 MMSD4148 SHDN Figure 20. Dual LTM4608 Output Sequencing Application See Also Dual 8A per Channel LTM4616 V IN 2.7V TO 5.5V 0.01µF Figure 21. 2.7V to 5.5V 22 CLKIN CLKIN ...
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Typical applicaTions LTM4608 4608fd 23 ...
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LTM4608 package DescripTion Please refer to http://www.linear.com/designtools/packaging/ Z aaa 24 for the most recent package drawings bbb 6.350 5.080 3.810 2.540 1.270 0.381 0.000 0.381 1.270 2.540 3.810 5.080 6.350 4608fd ...
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Rev B) REV DATE DESCRIPTION B 12/10 Voltage changed in the Typical Application drawing. Note added to the Absolute Maximum Ratings section. Note 2 added to the Electrical Characteristics section. Replaced graphs G05 and ...
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