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MP28248 Datasheet(PDF) 10 Page - Monolithic Power Systems

Part No. MP28248
Description  High-Efficiency, Fast-Transient, 3A, 4.2V-20V Input Synchronous Step-down Converter in a QFN12 (2x3mm) Package
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Maker  MPS [Monolithic Power Systems]
Homepage  http://www.monolithicpower.com
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MP28248 Datasheet(HTML) 10 Page - Monolithic Power Systems

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MP28248 – 3A, 4.2V-20V INPUT, FAST-TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm)
MP28248 Rev 1.0
www.MonolithicPower.com
10
1/5/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
BLOCK DIAGRAM
FREQ
OC
BST
VCC
UV Detect
Comparator
-
+
5V LDO
0.4V
ILIM
UV
OV
HS-FET
1MEG
LS-FET
RSEN
VCC
OV Detect
Comparator
+
-
1.0V
PWM
AGND
LOGIC
OFF
Timer
Current
Modulator
BSTREG
SOFT
START/STOP
Loop
Comparator
-
+
+
xS
xR
HS
Driver
Q
Current Sense
Amplifer
SW
LS
Driver
GND
EN
IN
REFERENCE
0.8V
START
FB
Refresh
Timer
SS
HS Ilimit
Comparator
-
+
ON
Timer
Over-Current
Timer
Figure 1: Functional Block Diagram


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