ltm4604a Linear Technology Corporation, ltm4604a Datasheet
ltm4604a
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ltm4604a Summary of contents
Page 1
... Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.375V to 5.5V, the LTM4604A supports an output voltage range of 0.8V to 5V, set by a single resistor. This high effi ciency design delivers continuous current (5A peak) ...
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... 125°C, θ JMAX PART MARKING* PACKAGE DESCRIPTION LTM4604AV 66-Lead (15mm × 9mm × 2.3mm) LGA LTM4604AV 66-Lead (15mm × 9mm × 2.3mm) LGA http://www.linear.com/leadfree/ http://www.linear.com/packaging/ The denotes the specifi cations which apply over the full internal ● ...
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... Open-Drain Pull-Down by design, characterization and correlation with statistical process controls. The LTM4604AI 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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... LTM4604A TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Output Current V = 2.5V IN 100 1.8V OUT V = 1.5V OUT 1.2V OUT V = 0.8V OUT OUTPUT CURRENT (A) 4604A G01 Minimum Input Voltage at 4A Load 3 3.3V OUT V = 2.5V OUT 3 1.8V OUT V = 1.5V OUT 2 1.2V OUT V = 0.8V OUT 2.0 1.5 1.0 0 0.5 1 1.5 2 2.5 3 3 (V) IN 4604A G04 ...
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... Current Limit Foldback 1.6 1.4 1.2 1.0 0.8 0.6 V 0.4 OUT 0 100 125 4604A G15 Short-Circuit Protection 1.5V Short, 4A Load V OUT 0.5V/DIV I IN 1A/DIV 4604A G13 LTM4604A 4604A G11 200μs/DIV = OUTPUT CURRENT (A) 4604A G12 4604A G14 100μs/DIV 4604af 5 ...
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... LTM4604A PIN FUNCTIONS V (B1, C1, C3-C7, D7, E6 and E7): Power Input Pins. IN Apply input voltage between these pins and GND pins. Recommend placing input decoupling capacitance directly between V pins and GND pins (D8-D11, E8-E11, F6-F11, G6-G11): Power Output OUT Pins. Apply output load between these pins and GND pins ...
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... IN C External Output Capacitor Requirement OUT (V = 2.375V to 5.5V 10μ ×2 M1 CONTROL, DRIVE 5.76k Figure 1. Simplifi ed LTM4604A Block Diagram T = 25°C. Use Figure 1 Confi guration. A CONDITIONS OUT = 1.5V) OUT OUT = 1.5V) OUT LTM4604A V IN 10μF 6. OUT 22μ ...
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... The TRACK pin is used for power supply tracking. See the Applications Information section. The LTM4604A is internally compensated to be stable over a wide operating range. Table 4 provides a guideline for input and output capacitance for several operating conditions. An excel loop analysis tool is provided for transient and stability analysis ...
Page 9
... FB Input Capacitors The LTM4604A module should be connected to a low ac- impedance DC source. Two 10μF ceramic capacitors are included inside the module. Additional input capacitors are only needed if a large load step is required full 4A level. An input 47μF bulk capacitor is only needed if the input source impedance is compromised by long inductive leads or traces ...
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... The RUN/SS pin provides dual functions of enable and soft-start control. The RUN/SS pin is used to control turn on of the LTM4604A. While this pin is below 0.5V, the LTM4604A will 7μA low quiescent current state. A 0.8V threshold will enable the LTM4604A. This pin can be used to sequence LTM4604A devices ...
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... LOAD CURRENT (A) Figure 4. 1.2V Power Loss Parallel Operation The LTM4604A device is an inherently current mode controlled device. Parallel modules will have very good current sharing. This will balance the thermals on the design. Figure 16 shows a schematic of the parallel design. The voltage feedback changes with the variable N as more modules are paralleled ...
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... LTM4604A APPLICATIONS INFORMATION 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0LFM 0.5 200LFM 400LFM 100 AMBIENT TEMPERATURE (°C) Figure 1.2V No Heat Sink IN OUT 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0LFM 0.5 200LFM 400LFM 100 AMBIENT TEMPERATURE (°C) Figure 8. 3.3V to 1.2V IN OUT 12 105 110 115 4606A F06 105 110 115 4606A F08 No Heat Sink 4 ...
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... AMBIENT TEMPERATURE (°C) Figure 12. 3.3V to 2.5V IN OUT 105 110 4606A F10 105 110 115 4606A F12 No Heat Sink Figure 13. 3.3V LTM4604A 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0LFM 0.5 200LFM 400LFM 100 105 110 115 AMBIENT TEMPERATURE (°C) 4606A F11 Figure 11 ...
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... LTM4604A APPLICATIONS INFORMATION Table 2. 1.2V Output DERATING CURVE V (V) IN Figures 6, 8 3.3, 5 Figures 6, 8 3.3, 5 Figures 6, 8 3.3, 5 Figures 7, 9 3.3, 5 Figures 7, 9 3.3, 5 Figures 7, 9 3.3, 5 Table 3. 2.5V Output DERATING CURVE V (V) IN Figures 10, 12 3.3, 5 Figures 10, 12 3.3, 5 Figures 10, 12 3.3, 5 Figures 11, 13 3.3, 5 Figures 11, 13 3.3, 5 Figures 11, 13 3.3, 5 Table 4. Output Voltage Response Versus Component Matrix (Refer to Figure 17 Load Step Typical Measured Values ...
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... Layout Checklist/Example The high integration of LTM4604A makes the PCB board layout very simple and easy. However, to optimize its electrical and thermal performance, some layout consid- erations are still necessary. ...
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... LTM4604A TYPICAL APPLICATIONS OPEN-DRAIN PULL UP Figure 16. Two LTM4604As in Parallel, 1. Design 2.375V IN1 10μF 6.3V X5R OR X7R V = 0.8V × ((4.99k/ OUT WHERE N IS THE NUMBER OF PARALLEL MODULES V IN PGOOD V OUT LTM4604A COMP FB RUN/SS TRACK SSEXT 2.87k GND 0.01μF C IN2 10μF 6 ...
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... TYPICAL APPLICATIONS OPEN-DRAIN 50k 10μF 6.3V X5R OR X7R V IN PGOOD V OUT PULL UP LTM4604A COMP FB RUN/SS TRACK C SSEXT GND 0.01μF Figure 17. 3. Input, 2. Design LTM4604A V OUT 2. OUT 22μF ×3 6.3V X5R OR X7R R REFER TO FB 2.37k TABLE 4 4604A F17 4604af 17 ...
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... LTM4604A PACKAGE DESCRIPTION aaa Z PAD “A1” CORNER 4 15.00 BSC X 9.00 Y BSC PACKAGE TOP VIEW 6.350 5.080 3.810 2.540 1.270 0.000 1.270 2.540 3.810 5.080 6.350 SUGGESTED PCB LAYOUT TOP VIEW 18 LGA Package 66-Lead (15mm × 9mm × 2.32mm) (Reference LTC DWG # 05-08-1820 Rev Ø) 2.19 – ...
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... IN C8 GND OUT OUT C9 GND OUT OUT C10 GND D10 V E10 V OUT OUT C11 GND D11 V E11 V OUT OUT LTM4604A PIN NAME PIN NAME F1 PGOOD G1 COMP F2 – GND G3 GND F4 GND G4 GND F5 GND G5 GND OUT ...
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... LTM4604A PACKAGE PHOTOGRAPH RELATED PARTS PART NUMBER DESCRIPTION LTC2900 Quad Supply Monitor with Adjustable Reset Timer Monitors Four Supplies; Adjustable Reset Timer LTC2923 Power Supply Tracking Controller LTM4600HV 10A DC/DC μModule LTM4601/LTM4601A 12A DC/DC μModule with PLL, Output Tracking/ Margining and Remote Sensing LTM4601AHVMP 12A Military Grade μ ...