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LTM4614 Datasheet(PDF) 1 Page - Linear Technology |
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LTM4614 Datasheet(HTML) 1 Page - Linear Technology |
1 / 32 page LTM4642 1 4642fb For more information www.linear.com/LTM4642 Typical applicaTion DescripTion 20VIN, Dual 4A or Single 8A DC/DC µModule Regulator TheLTM®4642isacompletedual4Aorsingle8Astep-down DC/DCμModule®(micromodule)regulator.Includedinthe packagearetheswitchingcontroller,powerFETs,inductor, and all support components. Operating over input voltage ranges of 4.5V to 20V, (2.375V min with external CPWR bias), the LTM4642 supports two outputs with voltage ranges of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers 4A continuous current (5A peak) for each output. High switching frequency and a valley current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The two outputs are interleaved with 180° phase to minimize the ripple noise and reduce the I/O capacitors. The power module is offered in a 9mm × 11.25mm × 4.92mm BGA package. The LTM4642 is RoHS compliant with Pb-free finish. Dual 4A 1V and 1.2V DC/DC µModule Regulator FeaTures applicaTions n Small Form Factor Dual 4A Power Supply n Wide Input Voltage Range: 4.5V to 20V (2.375V Min with CPWR Bias) n Dual 180° Out-of-Phase Outputs with 4A DC n Dual Outputs with 0.6V to 5.5V Range n Output Voltage Tracking n ±1.5% Maximum Total DC Output Voltage Error n Up to 95% Maximum Efficiency n Phase-Lockable Fixed Frequency 600kHz to 1.4MHz n Constant On-Time, Valley Current Mode Architecture n Selectable Burst Mode® Operation n Output Overvoltage and Overcurrent Protection n 9mm × 11.25mm × 4.92mm BGA Package n Telecom and Networking Equipment n Servers n FPGA Power Efficiency vs Load Current at 12V input L , LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, µModule and LTpowerCAD are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 8163643. + VIN1 VIN2 CPWR SGND PINS NOT USED: COMP1, COMP2, PHASEMD, CLKOUT, EXTVCC, SW1, SW2 GND LTM4642 4.7µF 22µF 2× 47µF 470pF VOUT1 470pF VOUT2 100µF 0.1µF VIN 4.75V TO 20V 2.2 DRVCC INTVCC RUN1 133k 10k 90.9k 61.9k 60.4k 4642 TA01a 10k VRNG1 RUN2 PGOOD1 PGOOD2 TRACK/SS1 TRACK/SS2 MODE/PLLIN INTVCC VOUT1 VOUT1 1V AT 4A LOAD VOUT2 VOUTS1 FREQ VOUTS– VFB2 VFB1 VOUT2 1.2V AT 4A LOAD INTVCC + 47µF 100µF 0.1µF LOAD CURRENT (A) 0 70 75 80 85 1 2 3 4 4642 TA01b 90 0.5 1.5 2.7 3.5 1.2V (650kHz) 1V (650kHz) |
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