MP8352DL-LF-P

MP8352
3V-6V Input, 6A, 600kHz Step-Down Converter
with Synchronizable Gate Driver
MP8352 Rev. 1.0 www.MonolithicPower.com 1
3/11/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP8352 is a monolithic step-down switch
mode converter with a built in internal power
MOSFET. It achieves 6A continuous output
current over a wide input supply range with
excellent load and line regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown.
The MP8352 requires a minimum number of
readily available standard external components
and is available in a space saving 3mm x 4mm
14-pin QFN package.
FEATURES
3V to 6V Operating Input Range
6A Continuous Output Current
45m Internal Power MOSFET Switch
External Power Supply Vcc
Power Good Indicator
Synchronous Gate Driver Delivers up to
95% Efficiency
Fixed 600KHz Frequency
Synchronizable Up to 1.5MHz
Cycle-by-Cycle Over Current Protection with
Hiccup
Thermal Shutdown
Output Adjustable from 0.8V
Stable with Low ESR Output Ceramic
Capacitors
Available in a 3mm x 4mm 14-Pin QFN
Package
APPLICATIONS
Point of Load Regulator in Distributed
Power System
Digital Set Top Boxes
Personal Video Recorders
Broadband Communications
Flat Panel Television and Monitors
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP8352
SW
BG
FB
BST
8, 9, 10
13
1
14
11
GND
IN
VCC
EN/SYNC
M2
V
IN
PGOOD
External V
CC
V
CC
PG
4, 5, 6
12
3
2
OFF ON
L1
2.2uH
0
123456
60
70
80
90
100
LOAD CURRENT(A)
EFFICIENCY(%)
Vin=3V
Vin=5V
Vin=6V
Efficiency vs.
Output Current
MP8352 – 3V to 6V INPUT, 6A, 600KHz STEP-DOWN WITH SYNCHRONOUS GATE DRIVER
MP8352 Rev. 1.0 www.MonolithicPower.com 2
3/11/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking Free Air Temperature (T
A
)
MP8352DL 3x4 QFN14 8352
–40°C to +85°C
* For Tape & Reel, add suffix –Z (eg. MP8352DL–Z).
For RoHS compliant packaging, add suffix –LF (eg. MP8352DL–LF–Z)
PACKAGE REFERENCE
TOP VIEW
FB
PG
EN/SYNC
IN
IN
IN
N/C
1
2
3
4
5
6
7
GND
BG
VCC
BST
SW
SW
SW
14
13
12
11
10
9
8
EXPOSED PAD
ON BACKSIDE
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
...................................... 6.5V
V
SW
....................... -0.3V(-5V for < 10ns) to 7.5V
V
BS
-V
SW
.......................................................... 6V
All Other Pins.................................–0.3V to +6V
Continuous Power Dissipation (T
A
= +25°C)
(2)
………………………………………………....2.6W
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature.............. –65°C to +150°C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
Vcc .......................3V to 6V
Operating Junct. Temp (T
J
)..... –40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
3x4 QFN14..............................48.......11.... °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 T
J (MAX)
, the junction-to-ambient
thermal resistance
JA
, and the ambient temperature T
A
. The
maximum allowable continuous power dissipation at any
ambient temperature is calculated by P
D (MAX)
= (T
J
(MAX)
-T
A
)/
JA
.
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.
MP8352 – 3V to 6V INPUT, 6A, 600KHz STEP-DOWN WITH SYNCHRONOUS GATE DRIVER
MP8352 Rev. 1.0 www.MonolithicPower.com 3
3/11/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 5V, V
CC
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Feedback Voltage V
FB
3V V
IN
6V
0.788 0.808 0.828 V
Feedback Current I
FB
V
FB
= 0.8V 10 nA
Switch On Resistance R
DS(ON)
45 m
Switch Leakage V
EN
= 0V, V
SW
= 0V 0 10 A
Current Limit
(5)
8 A
Oscillator Frequency f
SW
V
FB
= 0.6V 400 600 800 KHz
Fold-back Frequency V
FB
= 0V 60 150 240 KHz
Maximum Duty Cycle V
FB
= 0.6V 85 90 %
Minimum On Time t
ON
100 ns
V
CC
Under Voltage Lockout Threshold Rising 2.8 V
V
CC
Under Voltage Lockout Threshold
Hysteresis
200 mV
EN Input Low Voltage 0.4 V
En Input High Voltage 2.0 V
V
EN
= 2V 2
EN Input Current
V
EN
= 0V 0.1
A
Sync Frequency Range (Low) F
SYNCL
300 KHz
Sync Frequency Range (High) F
SYNCH
1.5 MHz
Enable Turnoff Delay T
OFF
5.0 us
Supply Current (Shutdown) V
EN
= 0V, VCC=5V 45 65 A
Supply Current (Quiescent) V
EN
= 2V, V
FB
= 1V 0.75 1.0 mA
Thermal Shutdown 150 °C
Gate Driver Sink Impedance R
SINK
1
Gate Driver Source Impedance R
SOURCE
4
Gate Drive Current Sense Trip Threshold 20 mV
Power Good Threshold Rising 0.69 0.74 0.79 V
Power Good Threshold Hysteresis 40 mV
PG Pin Level V
PG
PG Sink 4mA 0.4 V
Note:
5) Guaranteed by design.

MP8352DL-LF-P

Mfr. #:
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 3-6V 6A 600kHz Step Dwn w/sync gate drvr
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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