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MP28248 Datasheet Preview

MP28248 Datasheet

Synchronous Step-Down Converter

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MP28248
High-Efficiency, Fast-Transient, 3A, 4.2V-20V Input
Synchronous Step-down Converter
The Future of Analog IC Technology
in a QFN12 (2x3mm) Package
DESCRIPTION
The MP28248 is a fully-integrated, high-
efficiency, synchronous, step-down, switch
mode converter. It offers a very compact
solution that can achieve a 3A continuous
output current over a wide input supply range
with excellent load and line regulation. The
MP28248 operates at high efficiency over a
wide output-current load range.
Constant-On-Time control mode provides fast
transient response and eases loop stabilization.
Full protective features include short-circuit
protection, over-current protection, over-voltage
protection, under-voltage protection, and
thermal shutdown.
The MP28248 requires a minimal number of
readily-available standard external components.
This device is available in a space-saving
2mmx3mm 12-pin QFN package.
FEATURES
Wide 4.2V to 20V Operating Input Range
3A Output Current
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching-Loss Reduction
Technique
Soft Startup/Shutdown
Programmable Switching Frequency
SCP, OCP, UVP, OVP, and Thermal
Shutdown
Output Adjustable from 0.815V to 13V
Available in a QFN12 (2mmx3mm) Package
APPLICATIONS
Networking Systems
Distributed Power Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS
green status, please visit MPS website under the Products, Quality
Assurance page.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
100
90
80
70
60
50
40
0.01
Vin=12V
0.1 1
10
MP28248 Rev 1.0
1/5/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1




MPS

MP28248 Datasheet Preview

MP28248 Datasheet

Synchronous Step-Down Converter

No Preview Available !

MP28248 – 3A, 4.2V-20V INPUT, FAST-TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm)
ORDERING INFORMATION
Part Number
Package
MP28248GD*
QFN12 (2x3mm)
Top Marking
ACR
*For Tape & Reel, add suffix –Z (e.g. MP28248GD–Z).
PACKAGE REFERENCE
TOP VIEW
GND
GND 1
12 11 GND
SW 2
BST 3
SW 10 SW
9 IN
VCC 4
8 FREQ
EN 5
7 FB
6
SS
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.
MP28248 Rev 1.0
1/5/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
2


Part Number MP28248
Description Synchronous Step-Down Converter
Maker MPS
Total Page 19 Pages
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