Linear Technology Analog Devices LTM4622A Скачать руководство пользователя страница 22 | Manualshive

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LTM4622A

22

Rev B

For more information

APPLICATIONS INFORMATION

Figure 24. Thermal Image, 12V Input, 3.3V and 5V Output,

2A Each, No Airflow and No Heat Sink

Figure 25. Thermal Image, 12V Input, 5V and 8V Output,

2A Each, No Airflow and No Heat Sink

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Содержание Analog Devices LTM4622A

Страница 1: ...6V to 20V 0 6V to 5 5V Dual 2 5A or Single 5A LTM4622A 1 5V to 12V Dual 2A or Single 4A 3 3V and 5V Dual Output DC DC Step Down Module Regulator 12V Input 3 3V and 5V Output Efficiency vs Load Current...

Страница 2: ...e0 BGA 4 40 C to 125 C Consult Marketing for parts specified with wider operating temperature ranges Device temperature grade is indicated by a label on the shipping container Pad or ball finish code...

Страница 3: ...2 A VOUT Line VOUT Line Regulation Accuracy VOUT 1 5V VIN1 VIN2 3 6V to 20V IOUT 0A l 0 01 0 1 V VOUT Load VOUT Load Regulation Accuracy VOUT 1 5V IOUT 0A to 2A l 0 2 1 0 VOUT AC Output Ripple Voltage...

Страница 4: ...s is determined by specific operating conditions in conjunction with board layout the rated package thermal resistance and other environmental factors SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN...

Страница 5: ...Hz 5V OUTPUT 1 5MHz LOAD CURRENT mA 0 001 0 01 0 1 1 10 0 10 20 30 40 50 60 70 80 90 100 EFFICIENCY 4622A G04 Burst Mode OPERATION CMM 12V Output Transient Response 50 s DIV LOAD STEP 1A DIV VOUT AC C...

Страница 6: ...TPUT CAPACITOR 10 F CERAMIC 47 F POSCAP SOFT START CAP 0 1 F 20 s DIV 4622A G14 IIN 1A DIV VOUT 2V DIV VIN 12V VOUT 3 3V fSW 1MHz OUTPUT CAPACITOR 10 F 47 F POSCAP 10ms DIV VOUT 2V DIV RUN 10V DIV IIN...

Страница 7: ...adjustment PACKAGE ROW AND COLUMN LABELING MAY VARY AMONG Module PRODUCTS REVIEW EACH PACKAGE LAYOUT CAREFULLY RUN1 D2 RUN2 B2 RunControlInputofEachSwitch ing Mode Regulator Channel Enables chip oper...

Страница 8: ...itor Requirement VIN 3 6V to 20V VOUT 1 5V IOUT 2A 22 47 F Figure 1 Simplified LTM4622A Block Diagram POWER CONTROL FB2 60 4k 2 2 F 0 1 F 8 25k 0 22 F 10 F INTVCC VOUT2 TRACK SS2 0 1 F TRACK SS1 RUN1...

Страница 9: ...s above 22 5V to protect internal devices Multiphaseoperationcanbeeasilyemployedbyconnecting SYNC pin to an external oscillator Up to 6 phases can be paralleled to run simultaneously a good current sh...

Страница 10: ...above the zero current level to initiate another cycle Force Continuous Current Mode CCM Operation In applications where fixed frequency operation is more critical than low current efficiency and wher...

Страница 11: ...ule has a phase locked loop comprised of an internal voltage controlled oscillator and a phase detector This allows the internal top MOSFET turn on to be locked to the rising edge of the external cloc...

Страница 12: ...theramprate of the output voltage An internal 1 4 A current source will charge up the external soft start capacitor towards INTVCC voltage When the TRACK SS voltage is below 0 6V it will take over the...

Страница 13: ...th the same ratios as the resistor values calculated from the above equation can be used For example where the 60 4k is used then a 6 04k can be used to reduce the TRACK pin offset to a negligible val...

Страница 14: ...scontinuous mode DCM operation until the TRACK SS pin voltage reaches 0 6V reference voltage This will prevent the BG from turning on during the pre biased output start up which would discharge the ou...

Страница 15: ...flect an actual application or viable operating condition 3 JCtop the thermal resistance from junction to top of the product case is determined with nearly all of the componentpowerdissipationflowingt...

Страница 16: ...other sections of this data sheet After these laboratory test have been performed and correlated to the Modulemodel thenthe JBand BAaresummedtogether to correlate quite well with the Module model wit...

Страница 17: ...F12 VIN 16V AMBIENT TEMPERATURE C 30 40 50 60 70 80 90 100 110 120 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 LOAD CURRENT A 4622A F13 0LFM 200LFM 400LFM AMBIENT TEMPERATURE C 30 40 50 60 70 80 90 100 110...

Страница 18: ...5 LOAD CURRENT A 4622A F19 0LFM 200LFM 400LFM AMBIENT TEMPERATURE C 30 40 50 60 70 80 90 100 110 120 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 LOAD CURRENT A 4622A F20 0LFM 200LFM 400LFM AMBIENT TEMPERATU...

Страница 19: ...16 Figure 9 400 None 17 18 Table 4 5V Output DERATING CURVE VIN V POWER LOSS CURVE AIRFLOW LFM HEAT SINK JA C W Figures 19 20 12 16 Figure 10 0 None 19 20 Figures 19 20 12 16 Figure 10 200 None 17 18...

Страница 20: ...T 4 7 F 25V 0805 X5R Taiyo Yuden JMK212BJ476MG T 47 F 6 3V 0805 X5R VOUT V CIN CERAMIC F CIN BULK COUT1 CERAMIC F COUT2 BULK F CFF pF VIN V DROOP mV P P DERIVATION mV RECOVERY TIME s LOAD STEP A LOAD...

Страница 21: ...rovided to protect each unit from catastrophic failure The device does support thermal shutdown and over current protection and without airflow The derived thermal resistances in Tables 2 to 6 for the...

Страница 22: ...information www analog com APPLICATIONS INFORMATION Figure 24 Thermal Image 12V Input 3 3V and 5V Output 2A Each No Airflow and No Heat Sink Figure 25 Thermal Image 12V Input 5V and 8V Output 2A Each...

Страница 23: ...ce a dedicated power ground layer underneath the unit Thetwodedicatedinputdecouplingcapacitors onefor each VIN closely placed on each side of the module Tominimizetheviaconductionlossandreducemodule t...

Страница 24: ...65k 4622A F28 VOUT 3 3V 4A 47 F 2 F 0 1 F VOUT1 VOUT2 FB1 COMP1 COMP2 FREQ GND LTM4622A PGOOD1 PGOOD2 INTVCC PGOOD SYNC MODE TRACK SS1 TRACK SS2 FB2 VIN 4V TO 20V VIN2 VIN1 RUN2 RUN1 10 F 10 F 3 16k 4...

Страница 25: ...RACK SS1 TRACK SS2 13 3k FB2 VIN 4V TO 20V VIN2 VIN1 RUN2 RUN1 10 F 10 F 10k 10 F 4 VIN 4V TO 20V VOUT 1 5V 8A 1 F 47 F 4 0 1 F VOUT1 VOUT2 FB1 COMP1 COMP2 FREQ GND LTM4622A PGOOD1 PGOOD2 PGOOD VIN2 R...

Страница 26: ...ION PIN ID FUNCTION PIN ID FUNCTION A1 VOUT2 A2 VIN2 A3 TRACK SS2 A4 FB2 A5 COMP2 B1 VOUT2 B2 RUN2 B3 VIN2 B4 PGOOD2 B5 GND C1 GND C2 GND C3 INTVCC C4 FREQ C5 SYNC MODE D1 VOUT1 D2 RUN1 D3 VIN1 D4 PGO...

Страница 27: ...25mm 1 82mm Reference LTC DWG 05 08 1949 Rev 7 SEE NOTES NOTES 1 DIMENSIONING AND TOLERANCING PER ASME Y14 5M 1994 2 ALL DIMENSIONS ARE IN MILLIMETERS LAND DESIGNATION PER JESD MO 222 SPP 010 5 PRIMA...

Страница 28: ...R MAY BE EITHER A MOLD OR MARKED FEATURE b 25 PLACES A DETAIL B PACKAGE SIDE VIEW M X Y Z ddd M Z eee A2 D E e b F G DETAIL A 0 3175 0 3175 BGA 25 0517 REV A LTMXXXXXX Module TRAY PIN 1 BEVEL PACKAGE...

Страница 29: ...use nor for any infringements of patents or other rights of third parties that may result from its use Specifications subject to change without notice No license is granted by implication or otherwise...

Страница 30: ...m 1 91mm LGA LTM4642 20VIN Dual 4A Step Down Module Regulator 4 5V VIN 20V 0 6V VOUT 5 5V 9mm 11 25mm 4 92mm BGA LTM4643 Ultrathin Quad 3A Step Down Module Regulator 4V VIN 20V 0 6V VOUT 3 3V 9mm 15mm...

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