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LTM8045 Datasheet(PDF) 1 Page - Linear Technology |
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LTM8045 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 36 page  LTM4644/LTM4644-1 1 4644fe For more information www.linear.com/LTM4644 n Quad Output Step-Down µModule® Regulator with 4A per Output n Wide Input Voltage Range: 4V to 14V n 2.375V to 14V with External Bias n 0.6V to 5.5V Output Voltage n 4A DC, 5A Peak Output Current Each Channel n Up to 5.5W Power Dissipation (TA = 60°C, 200 LFM, No Heat Sink) n ±1.5% Total Output Voltage Regulation n Current Mode Control, Fast Transient Response n Parallelable for Higher Output Current n Output Voltage Tracking n Internal Temperature Sensing Diode Output n External Frequency Synchronization n Overvoltage, Current and Temperature Protection n 9mm × 15mm × 5.01mm BGA Package TYPICAL APPLICATION FEATURES DESCRIPTION Quad DC/DC µModule Regulator with Configurable 4A Output Array The LTM®4644/LTM4644-1 is a quad DC/DC step-down µModule (micromodule) regulator with 4A per output. Outputs can be paralleled in an array for up to 16A capabil- ity. Included in the package are the switching controllers, powerFETs,inductorsandsupportcomponents.Operating over an input voltage range of 4V to 14V or 2.375V to 14V with an external bias supply, the LTM4644/LTM4644-1 supports an output voltage range of 0.6V to 5.5V. Its high efficiency design delivers 4A continuous (5A peak) output current per channel. Only bulk input and output capacitors are needed. LTM4644 LTM4644-1 Top Feedback Resistor from VOUT-to-VFB (one resistor per channel) Integrated 60.4k 0.5% Resistor External (to be added on PCB) Application General Applications To Interface with PMBus power system management supervisory ICs such as the LTC2975 Configurable Output Array* 4A 4A 4A 4A 8A 4A 4A 12A 4A 16A * Note 4 Click to view associated TechClip Videos. 1.5V Output Efficiency and Power Loss (Each Channel) APPLICATIONS n Multirail Point of Load Regulation n FPGAs, DSPs and ASICs Applications 4V to 14V Input, Quad 0.9V, 1V, 1.2V and 1.5V Output DC/DC µModule Regulator* All registered trademarks and trademarks are the property of their respective owners. 4644 TA01a VIN1 SVIN1 RUN1 VIN2 SVIN2 RUN2 VIN3 SVIN3 RUN3 VIN4 SVIN4 RUN4 SGND LTM4644 CLKIN 22µF ×2 16V CLKOUT TEMP GND VOUT1 FB1 PGOOD1 VOUT2 FB2 PGOOD2 VOUT3 FB3 PGOOD3 VOUT4 FB4 PGOOD4 47µF 4V 1.5V/4A 4V to 14V 40.2k 47µF 4V 1.2V/4A 60.4k 47µF 4V 1V/4A 90.9k 47µF 4V 0.9V/4A 121k *TA = 60°C, 200LFM, NO HEAT SINK LOAD CURRENT (A) 0 55 75 80 85 95 1 4644 TA01b 70 65 60 90 0 0.5 1 2 1.5 4 2 3 VIN = 5V VIN = 12V |
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