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MC34726BFC Folha de dados(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC34726BFC Folha de dados(HTML) 1 Page - Freescale Semiconductor, Inc |
1 / 19 page Document Number: 34726 Rev. 1.0, 5/2008 Freescale Semiconductor Advance Information * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2008. All rights reserved. 300mA High Efficiency Low Quiescent Current Synchronous Buck Regulator With Z-mode The 34726 is a high efficiency, low quiescent current (IQ), synchro- nous buck regulator, implementing Freescale’s innovative Z-mode ar- chitecture. Freescale’s Z-mode architecture greatly improves the ripple performance during light load currents, but still maintains a low quies- cent current of 65uA, at no load in “Sleepy” Z-mode. The 34726 accepts an input voltage in the range of 2.7 to 5.5V, making it ideally suited for single cell Li-Ion based applications. Factory preset output voltages, ranging from 0.8V to 3.3V, reduce the number of required auxiliary components. The part is able to provide 300mA of continuous load current across the input and the output voltage ranges. The 34726 switches at 2.0MHz to allow the use of small, surface mount inductors and capacitors to save precious board space. The 34726 is available in the small, space saving, and low cost, 2x2 UDFN-8 packages. The part is guaranteed for operation over the -25°C to 85°C temperature range. Features • 94% peak efficiency • 2.0MHz switching frequency • 2.7V to 5.5V input voltage range • Automatic transition to energy saving light load Z-mode (low ripple) • Fixed output voltage options from 0.8 to 3.3V •65 µA quiescent current during sleepy Z-mode • 300mA maximum continuous output current • Internal 2.0ms soft start • Thermal and over-current protection •0.1 µA quiescent current in shutdown (disabled) • Ultra thin 2x2 UDFN package • Pb-free packaging designated by suffix code FC Figure 1. 34726 Typical Operating Circuit POWER MANAGEMENT IC FC SUFFIX (PB-FREE) 98ASA10787D 8-PIN UDFN 2X2 34726 ORDERING INFORMATION Device Temperature Range (TA) Package MC34726AFC/R2 -25°C to 85°C 8-UDFN MC34726BFC/R2 MC34726CFC/R2 Bottom View VIN EN SW FB GND ON OFF 2.7V ~ 5.5V 0.8 - 3.3V * 300mA 34726 CIN COUT L1 *Programmable See table 1 |
Nº de peça semelhante - MC34726BFC |
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Descrição semelhante - MC34726BFC |
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