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MP28248 Datasheet(PDF) 2 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) 2 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
2
1/5/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number
Package
Top Marking
MP28248GD*
QFN12 (2x3mm)
ACR
*For Tape & Reel, add suffix –Z (e.g. MP28248GD–Z).
PACKAGE REFERENCE
GND
SW
BST
VCC
EN
GND
SW
IN
FREQ
FB
TOP VIEW
SS
GND
1
2
12
3
4
8
7
6
5
11
10
9
SW
QFN12 (2x3mm)
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN ....................................... 22V
VSW..................................... -0.3V to (VIN + 0.3V)
VBS ....................................................... VSW + 6V
IVIN (RMS)........................................................ 3.5A
All Other Pins..................................-0.3V to +6V
Continuous Power Dissipation
(TA = 25°C)
(2)
QFN12 (2X3mm)........................................ 1.8W
Junction Temperature ..............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... -65°C to +150°C
Recommended Operating Conditions
(3)
Supply Voltage VIN ...........................4.2V to 20V
Output Voltage VOUT.....................0.815V to 13V
Maximum Junction Temp. (TJ) ... -40°C to 125°C
Thermal Resistance
(4)
θJA
θJC
QFN12 (2mmx3mm)............... 70 ...... 15... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/θJA. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.


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