LTM4602 LINER [Linear Technology], LTM4602 Datasheet
LTM4602
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LTM4602 Summary of contents
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... 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 LTM4602 supports an output voltage range of 0.6V to 5V, set by a single resistor. This high effi ciency design delivers 6A continuous current (8A peak), needing no heat sinks or airfl ...
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... LTM4602EV#PBF LTM4602V LTM4602IV#PBF LTM4602V Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: This product is only offered in trays ...
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... I = 5mA PGOOD Note 2: The LTM4602E 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 LTM4602I is guaranteed over the – ...
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... LTM4602 TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current with 5V (FCB = 0) IN 100 0.8V OUT 1.2V OUT 60 1.5V OUT 1.8V OUT 2.5V OUT 50 3.3V * OUT *FOR 5V TO 3.3V CONVERSION, 40 SEE FREQUENCY ADJUSTMENT IN APPLICATIONS INFORMATION LOAD CURRENT (A) 4602 G01 Light Load Effi ciency vs Load Current with 12V IN (FCB > ...
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... OPEN ADJ 5.0 4.5 4.0 3.5 3.0 2.5 2.0 4602 G13 1.5 1.0 0 SEE FREQUENCY ADJUSTMENT DISCUSSION FOR 12V CONVERSION LTM4602 Short-Circuit Protection OUT V OUT 0.5V/DIV I IN 0.5A/DIV 20μs/DIV V = 12V 1.5V OUT × 22μF, 6.3V X5R OUT 330μF, 4V SANYO POSCAP NO EXTERNAL SOFT-START CAPACITOR Step-Down Ratio 5V 3 ...
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... A15): A 110k resistor from V ADJ the one-shot timer current, thereby setting the switching frequency. The LTM4602 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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... C External Output Capacitor Requirement OUT (V = 4.5V to 20V OUT SV IN 1000pF Q1 INT 4.75k CONTROLLER Q2 Figure 1. Simplifi ed LTM4602 Block Diagram T = 25° 12V. Use Figure 1 confi guration CONDITIONS OUT = 1.5V 6A, Refer to Table 2 in the OUT = 1.5V) Applications Information Section ...
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... Schottky diode. The typical switching frequency is 850kHz at full load. With current mode control and internal feedback loop compensation, the LTM4602 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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... V pin to SET SET OSET Input Capacitors The LTM4602 μModule should be connected to a low AC-impedance DC source. High frequency, low ESR input resistor capacitors are required to be placed adjacent to the mod- SET ule. In Figure 21, the bulk input capacitor C for its ability to handle the large RMS current into the converter ...
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... SS_EXT = t DELAY When the voltage on RUN/SS pin reaches 1.5V, the LTM4602 internal switches are operating with a clamping of the maximum output inductor current limited by the RUN/SS pin total soft-start capacitance. As the RUN/SS pin voltage rises to 3V, the soft-start clamping of the inductor current is released ...
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... NONE 220pF 12 30 NONE NONE 220pF 12 32 NONE NONE 100pF 15 80 NONE NONE 100pF 20 80 LTM4602 PART NUMBER 6TPE330MIL (330μF , 6.3V) 2R5TPE470M9 (470μF , 2.5V) 4TPE470MCL (470μF , 4V) PEAK TO PEAK RECOVERY TIME LOAD STEP (mV) (μs) (A/μ ...
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... RUN V RUN/SS 4V SHORT-CIRCUIT LATCH ARMED SHORT-CIRCUIT OUTPUT CLAMPING LATCHOFF OVERLOAD RELEASED L HAPPENS V OUT 75 LTM4602 RUN/SS RUN/SS PGND SGND RECOMMENDED VALUES FOR R RUN/ RUN/SS 4.5V TO 5.5V 50k 10.8V TO 13.8V 150k 16V TO 20V 330k 4602 F04 IN 3. 4602 F03 4602fa ...
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... APPLICATIONS INFORMATION Enable The RUN/SS pin can be driven from logic as shown in Figure 5. This function allows the LTM4602 to be turned on or off remotely. The ON signal can also control the sequence of the output voltage. RUN/SS ON LTM4602 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 LTM4602 modules can be paralleled to provide higher than 6A output current. Figure 7 shows the neces- sary interconnection between two paralleled modules. The OPTI-LOOP ® ...
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... TEMPERATURE (°C) 4602 F09 Figure 12. 12v to 1.5V, BGA Heat Sink 0LFM 1 200LFM 400LFM 0 90 100 50 4602 F14 Figure 15 3.3V, BGA Heat Sink LTM4602 100 TEMPERATURE (°C) Figure 10 1.5V, BGA Heat Sink 4 3.3V LOSS 12V TO 3 ...
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... BGA Heat Sink 400 BGA Heat Sink Layout Checklist/Example The high integration of the LTM4602 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, ...
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... OFF ON 4602 F19 PERIOD t s Figure 19. LTM4602 Switching Period The LTM4602 has a minimum ( time of 100 nanosec- ON onds and a minimum (t ) off time of 400 nanoseconds. OFF The 2.4V clamp on the ramp threshold as a function of V will cause the switching frequency to increase by the ...
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... LTM4602 APPLICATIONS INFORMATION Equations for setting frequency for 5V to 3.3V – 0.7V)/110k 39μ frequency = (I /[2.4V • 10pF]) • 1.07MHz duty cycle, duty cycle on-time OFF ON switching period 1/frequency S t must be greater than 400ns OFF • ...
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... V CER IN (MULTIPLE PINS) EXTV V CC OUT (MULTIPLE PINS ADJ V OSET LTM4602 COMP FCB PGOOD RUN/SS C4 OPT SGND PGND (MULTIPLE PINS) LTM4602 V EFFICIENCY = 94% OUT 3. LOAD + C4 C2 330μF 22μF 6.3V R SET 22. 100pF V EFFICIENCY = 92.5% OUT LOAD + C4 C2 330μ ...
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... CC OUT FCB V OSET LTM4602 RUN SV IN COMP PGOOD SGND PGND C1, C7: TDK C3216X5R1E106MT 4602 TA02 C2, C9: TAIYO YUDEN, JMK316BJ226ML-T501 C5, C10: SANYO POSCAP, 4TPE330MI Current Sharing Between Two LTM4602 Modules 6 12V IN 2.5V OUT 12A MAX 4 I OUT2 I OUT1 TOTAL LOAD 4602 TA03 = 0.6V • ...
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... PACKAGE DESCRIPTION 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 Z Z 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 LTM4602 4602fa 21 ...
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... LTM4602 PACKAGE DESCRIPTION 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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... 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 LTM4602 PIN NAME A15 f ADJ A17 SV IN A19 EXTV CC A21 V OSET B23 COMP D23 SGND F23 RUN/SS G23 FCB J23 PGOOD 4602fa 23 ...
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... IN C5 100pF ADJ 1. EXTV V CC OUT FCB V OSET R1 LTM4602 100k RUN SV IN COMP PGOOD R SET SGND PGND 49.9k 4602 TA04 1% COMMENTS Monitors Four Supplies; Adjustable Reset Timer Tracks Both Up and Down; Power Supply Sequencing No Optocoupler Required; 3.3V, 12A Output; Simple Design ...