LTM4600 LINER [Linear Technology], LTM4600 Datasheet
LTM4600
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LTM4600 Summary of contents
Page 1
... Included in the package are the switching control- ler, power FETs, inductor, and all support components. Operating over an input voltage range of 4.5V to 20V, the LTM4600 supports an output voltage range of 0.6V to 5V, set by a single resistor. This high effi ciency design delivers 10A continuous current (14A peak), needing no heat sinks or airfl ...
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... T = 125°C, θ = 15°C/W, θ = 6°C/W, JMAX JA JC DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS JA WEIGHT = 1.7g LGA PART MARKING LTM4600EV LTM4600IV = 120µ 200µF/Ceramic per typical OUT MIN TYP MAX ● 4 1.478 1.50 1 ...
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... I = 5mA PGOOD Note 2: The LTM4600E is guaranteed to meet performance specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4600I is guaranteed and tested over the – ...
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... LTM4600 W U TYPICAL PERFOR A CE CHARACTERISTICS Effi ciency vs Load Current with 5V (FCB = 0) IN 100 0.6V OUT 1.2V OUT 40 1.5V OUT 2.5V OUT LOAD CURRENT (A) 4600 G01 Effi ciency vs Load Current with Different FCB Settings 90 FCB > 0. FCB = GND 50 40 ...
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... Stepdown Ratio IN OUT 5 OPEN ADJ 5.0 4.5 4.0 3.5 3.0 2.5 2.0 4600 G13 1.5 1.0 0.5 0. SEE FREQUENCY ADJUSTMENT DISCUSSION FOR 12V OUT CONVERSION LTM4600 Short-Circuit Protection OUT V OUT (0.5V/DIV (0.2A/DIV) 4600 G12 20µs/DIV V = 12V 1.5V OUT C = 2× 200µF/X5R OUT NO EXTERNAL SOFT-START CAPACITOR 5V 3.3V 2.5V 1.8V 1.5V 1 ...
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... A15): A 110k resistor from V ADJ the one-shot timer current, thereby setting the switching frequency. The LTM4600 switching frequency is typically 850kHz. An external resistor to ground can be selected to reduce the one-shot timer current, thus lower the switching frequency to accommodate a higher duty cycle step down requirement ...
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... OUT (V = 4.5V to 15V OUT 1000pF Q1 INT COMP 4.75k CONTROLLER Q2 10Ω Figure 1. Simplifi ed LTM4600 Block Diagram 25° 12V. Use Figure 1 confi guration CONDITIONS I = 10A OUT = 1.5V 10A, Refer to Table 2 in the OUT = 1.5V) Applications Information Section ...
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... Schottky diode. The typical switching frequency is 800kHz at full load. With current mode control and internal feedback loop compensation, the LTM4600 module has suffi cient stability margins and good transient performance under a wide range of operat- ing conditions and with a wide range of output capacitors, even all ceramic output capacitors (X5R or X7R) ...
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... SGND SET OSET R SET Input Capacitors The LTM4600 µModule should be connected to a low resistor ac-impedance DC source. High frequency, low ESR input SET capacitors are required to be placed adjacent to the mod- ule. In Figure 20, the bulk input capacitor C for its ability to handle the large RMS current into the 31 ...
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... U Soft-Start and Latchoff with the RUN/SS pin The RUN/SS pin provides a means to shut down the LTM4600 as well as a timer for soft-start and over-cur- rent latchoff. Pulling the RUN/SS pin below 0.8V puts the LTM4600 into a low quiescent current shutdown (I ≤ 75µA). Releasing the pin allows an internal 1.2µA cur- rent source to charge up the timing capacitor CSS ...
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... NONE 100pF 12 330µF 6.3V NONE 100pF 12 NONE NONE 100pF 12 NONE NONE 100pF 15 NONE NONE 100pF 20 LTM4600 PART NUMBER 6TPE330MIL (330µF, 6.3V) 2R5TPE470M9 (470µF, 2.5V) 4TPE470MCL (470µF, 4V) DROOP PEAK TO PEAK RECOVERY TIME (mV) (mV) (µ ...
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... Figure 4. Defeat Short-Circuit Latchoff with a Pull- simple solution Resistor during startup and RUN V RUN/ SHORT-CIRCUIT LATCH ARMED SOFT-START SHORT-CIRCUIT OUTPUT CLAMPING LATCHOFF OVERLOAD RELEASED L HAPPENS 500k LTM4600 RUN/SS PGND SGND 4600 F04 IN 3. 4600 F03 4600fa ...
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... U U APPLICATIO S I FOR ATIO Enable The RUN/SS pin can be driven from logic as shown in Figure 5. This function allows the LTM4600 to be turned on or off remotely. The ON signal can also control the sequence of the output voltage. RUN/SS LTM4600 ON PGND 2N7002 Figure 5. Enable Circuit with External Logic ...
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... The penalty is that the controller may skip cycle and the output voltage ripple increases at light load. Paralleling Operation with Load Sharing Two or more LTM4600 modules can be paralleled to provide higher than 10A output current. Figure 7 shows the neces- sary interconnection between two paralleled modules. The OPTI-LOOP™ ...
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... LFM 400 LFM AMBIENT TEMPERATURE (°C) Figure 12. BGA Heatsink 12V 3. 4600 F14 LTM4600 1. 1. LFM 200 LFM 400 LFM AMBIENT TEMPERATURE (°C) 4600 F09 Figure 10 ...
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... LTM4600 U U APPLICATIO S I FOR ATIO Table 3. 1.5V Output DERATING CURVE V (V) IN Figures Figures Figures Figures 10 Figures 10 Figures 10 Table 4. 3.3V Output DERATING CURVE V (V) IN Figure 14 12 Figure 14 12 Figure 14 12 Figure 15 ...
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... U U APPLICATIO S I FOR ATIO Layout Checklist/Example The high integration of the LTM4600 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, in- ...
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... C5 C1 100pF 10µ ADJ 25V EXTV V CC OUT FCB V OSET LTM4600EV RUN/ COMP PGOOD OPEN DRAIN SGND PGND 4600 F19 = 15k C1, C3: TDK C3216X5R1E106MT ADJ C2: TAIYO YUDEN, JMK316BJ226ML C4: SANYO POS CAP, 6TPE330MIL are above the minimums with adquate guard /[2.4V • ...
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... (MULTIPLE PINS) EXTV CC (MULTIPLE PINS ADJ V OSET LTM4600 COMP FCB PGOOD RUN/SS SGND PGND C4 (MULTIPLE PINS) OPT LTM4600 IN OUT 17 4600 F20 V V OUT OUT + C OUT1 C OUT2 22µF 470µF 6.3V REFER TO ×3 TABLE 2 REFER TO TABLE 2 0. REFER TO STEP DOWN ...
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... V CC OUT FCB V OSET LTM4600 RUN SV IN COMP PGOOD SGND PGND C1, C3, C7, C8: TDK C3216X5R1E106MT 4600 TA02 C2, C9: TAIYO YUDEN, JMK316BJ226ML-T501 C5, C10: SANYO POS CAP, 4TPE470MCL Current Sharing Between Two LTM4600 Modules 12 12V IN 2.5V OUT 20A 10 MAX I OUT2 8 I OUT1 ...
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... PACKAGE DESCRIPTIO 6.9865 5.7142 4.4442 3.1742 1.9042 0.6342 0.0000 0.6358 1.9058 3.1758 4.4458 5.7158 6.9421 bbb 6.3500 5.0800 3.8100 2.5400 1.2700 0.3175 0.0000 0.3175 1.2700 2.5400 3.8100 5.0800 6.3500 LTM4600 4600fa 21 ...
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... LTM4600 PACKAGE DESCRIPTIO PIN NAME PIN NAME A10 - B10 - A11 V B11 - IN A12 - B12 - A13 V B13 - IN A14 - B14 - A15 f B15 - ADJ A16 - B16 - A17 SV B17 - IN A18 - B18 - A19 EXTV ...
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... T4 V OUT T6 V OUT T8 V OUT T10 V OUT T12 V OUT T14 V OUT T16 V OUT T18 V OUT T20 V OUT T22 V OUT LTM4600 PIN NAME V A15 f IN ADJ V IN A17 A19 EXTV A21 V OSET V IN B23 COMP V IN D23 ...
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... FAX: (408) 434-0507 ● 1.8V, 10A Regulator C5 100pF ADJ 1.8V AT 10A EXTV V CC OUT FCB V OSET R1 LTM4600 100k RUN SV IN COMP PGOOD R2 SGND PGND C1, C2: TDK C3216X5R1E106MT 49.9k C3: TAIYO YUDEN, JMK316BJ226ML-T501 4600 TA04 1% C4: SANYO POS CAP, 4TPE470MCL COMMENTS Monitors Four Supplies; Adjustable Reset Timer Tracks Both Up and Down ...