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MP28258DD Datasheet(PDF) 8 Page - Monolithic Power Systems |
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MP28258DD Datasheet(HTML) 8 Page - Monolithic Power Systems |
8 / 18 page MP28258 – 3A, 4.2V-20V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm) MP28258 Rev 1.14 www.MonolithicPower.com 8 9/25/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. BLOCK DIAGRAM START - + + - + SOFT START/STOP FREQ VCC 5V LDO ILIM OC Q VCC SW GND 0 VCC IN BST RSEN LS Driver HS Driver LS_FET HS_FET PWM LOGIC xS xR Over-Current Timer Current Sense Amplifer Current Modulator UV OV UV Detect Comparator OV Detect Comparator OFF Timer ON Timer HS IIimit Comparator Loop Comparator EN 1.0V 0.8V 1MEG 0.4V 0 0 FB PGOOD Comparator REFERENCE PG + - - + Figure 1—Function Block Diagram |
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