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LTM4636 Scheda tecnica(PDF) 1 Page - Linear Technology |
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LTM4636 Scheda tecnica(HTML) 1 Page - Linear Technology |
1 / 36 page LTM4636 1 4636f For more information www.linear.com/LTM4636 Typical applicaTion DescripTion 40A DC/DC µModule Regulator The LTM®4636 is a 40A step-down µModule (power module) switching regulator with a stacked inductor as a heat sink for quicker heat dissipation and cooler operation in a small package. The exposed inductor permits direct contact with airflow from any direction. The LTM4636 can deliver 40W (12VIN, 1VOUT, 40A, 200LFM) with only 40°C rise over the ambient temperature. Full-power 40W is delivered, up to 83°C ambient and half-power 20W is supported at 110°C ambient. The LTM4636 operates at 92%, 90% and 88% efficiency, delivering 15A, 30A and 40A, respectively, to a 1V load (12VIN). The µModule regulator is scalable such that four µModules in current sharing mode deliver 160W with only 40°C rise and 88% efficiency (12VIN, 1VOUT, 400LFM). The LTM4636 is offered in a 16mm × 16mm × 7.07mm BGA package. L , LT, LTC, LTM, PolyPhase, Burst Mode, µModule, Linear Technology, LTpowerCAD and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210, 8163643. 1V, 40A DC/DC µModule Regulator FeaTures applicaTions n Stacked Inductor Acts as Heat Sink n Wide Input Voltage Range: 4.7V to 15V n 0.6V to 3.3V Output Voltage Range n ±1.3% Total DC Output Voltage Error Over Line, Load and Temperature (–40°C to 125°C) n Differential Remote Sense Amplifier for Precision Regulation n Current Mode Control/Fast Transient Response n Frequency Synchronization n Parallel Current Sharing (Up to 240A) n Internal or External Compensation n 88% Efficiency (12VIN, 1VOUT) at 40A n Overcurrent Foldback Protection n 16mm × 16mm × 7.07mm BGA Package n Telecom Servers and Networking Equipment n Industrial Equipment and Medical Systems 12VIN , 1VOUT Efficiency vs Output Current RUNC RUNP HIZREG FREQ TEMP+ TEMP– SGND VIN 1V 34.8k 22µF 0.1µF 22µF 16V ×5 4.70V TO 15V 100µF 25V INTVCC PVCC VIN ≤ 5.5V, TIE VIN, INTVCC AND PVCC TOGETHER, TIE RUNP TO GND. VIN > 5.5V, THEN OPERATE AS SHOWN OPTIONAL TEMP MONITOR INTVCC INTVCC PVCC LTM4636 PVCC PGND VOUTS1+ VOUT VOUTS1– VFB + 470µF 6.3V ×3 + 7.5k 100µF 6.3V ×4 VOUT 1V, 40A 4636 TA01a PINS NOT USED IN THIS CIRCUIT: CLKOUT, GMON, PGOOD, PHMODE, PWM, SW, TEST1, TEST2, TEST3, TEST4, TMON COMPA COMPB SNSP1 SNSP2 MODE/PLLIN TRACK/SS 15k OUTPUT CURRENT (A) 0 90 95 100 15 25 4636 TA01b 85 80 5 10 20 30 40 35 75 70 |
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