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APU3073 Datasheet(PDF) 1 Page - Advanced Power Electronics Corp. |
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APU3073 Datasheet(HTML) 1 Page - Advanced Power Electronics Corp. |
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1 / 17 page  APU3073 200815061-1/17 Data and specifications subject to change without notice. DESCRIPTION The APU3073 controller IC is designed to provide a low cost synchronous Buck regulator for on-board DC to DC converter for multiple output applications. The outputs can be programmed as low as 0.8V for low voltage applications. Selectable over-current protection is provided by using external MOSFET's on-resistance for optimum cost and performance. This device features a programmable frequency set from 200KHz to 400KHz, under-voltage lockout for all input supplies, an external programmable soft-start function as well as output under-voltage detection that latches off the device when an output short is detected. Synchronous Controller plus one LDO controller Current Limit using MOSFET Sensing Single 5V/12V Supply Operation Programmable Switching Frequency up to 400KHz Soft-Start Function Fixed Frequency Voltage Mode Precision Reference Voltage Available Uncommitted Error Amplifier available for DDR voltage tracking application PACKAGE ORDER INFORMATION FEATURES SYNCHRONOUS PWM CONTROLLER WITH OVER-CURRENT PROTECTION / LDO CONTROLLER APPLICATIONS DDR memory source sink VTT application Low cost on-board DC to DC such as 12V/5V to output voltages as low as 0.8V Graphic Card Hard Disk Drive Multi-Output Applications RoHS Compliant TA (°C) DEVICE PACKAGE 0 To 70 APU3073O 16-Pin TSSOP Technology Licensed from International Rectifier Figure 1 - Typical application of APU3073. TYPICAL APPLICATION APU3073 U1 Vcc VcL HDrv LDrv Fb1 Gnd Comp SS/SD VOUT1 Rt +5V OCSet PGnd Drv2 Fb2 3.3V VOUT2 Q1 C2 C11 C9 C1 C6 C7 C10 L2 L1 Q4 Q5 R1 R2 R8 R9 R7 R10 R11 VcH VP1 VREF 12V C3 0.1uF C4 D1 |
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