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MC34700EPR2 Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC34700EPR2 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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1 / 31 page  Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to permit improvements in the design of its products. Document Number: MC34700 Rev. 4, 6/2008 Freescale Semiconductor Technical Data © Freescale Semiconductor, Inc., 2008. All rights reserved. 9 to 18V, Quad Output, Integrated MOSFET Power Supply The 34700 is a compact, high efficiency power supply, with on-chip power MOSFETs that feature three step down switching regulators and one low dropout linear regulator. The switching regulators utilize voltage mode control with external compensation, allowing flexibility in optimizing the performance of the 34700 for a given application. The 34700 is ideal for space constrained applications where multiple power rails are required and simplicity of design and implementation of the power supply is necessary. Over-voltage, under-voltage, over-current, and over-temperature protection features ensure robust and reliable operation. Fixed switching frequency, internal soft start, and internal power MOSFETs enable rapid power supply design and development. The 34700 is well suited for power supply designs in wide variety of applications, including set top boxes, cable modems, laser printers, fax machines, point of sale terminals, small appliances, telecom line cards, and DVD players. Features • Three switching regulators: 2 synchronous and 1 non-synchronous • One low dropout linear regulator • Input current capability: • 1.5A continuous on channel 1 • 1.25A continuous on channels 2 and 3 • 400mA continuous on channel 4 • Internal power MOSFETs on all channels • Voltage feed forward on channel 1 • ±1.5% Output voltage accuracy on all channels • Cycle-by-cycle current limit and short-circuit protection • Fixed 800kHz switching frequency • Internal soft start • Over-voltage, under-voltage, and over-temperature protection • Open-drain power good output signal • Separate active-high enable input for each channel • Pb-free packaging designated by suffix code EP Figure 1. MC34700 Simplified Application Diagram POWER SUPPLY 34700 EP SUFFIX (Pb FREE) 98ASA10800D 32-Pin QFN 5 x 5mm ORDERING INFORMATION Device Temperature Range (TA) Package MC34700EP/R2 -40°C to 85°C 32 QFN MC34700 VDDI PGOOD EN1 VIN VIN1 VIN2 VIN3 AGND GND2 GND3 BST1 SW1 COMP1 FB1 BST2 SW2 COMP2 FB2 BST3 SW3 COMP3 FB3 LDO LDO_VIN LDO_FB VOUT1 Enable 1 EN1 Enable 2 EN1 Enable 3 EN_LDO Enable 4 VGREG Power Good VIN1 9V - 18V VOUT1 2.0 - 5.25V, 1.5A VOUT2 0.7 - 3.6V, 1.25A VOUT3 0.7 - 3.6V, 1.25A VOUT4 0.7 - 3.6V, 0.4A |
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