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MP8676DN 数据表(PDF) 2 Page - Monolithic Power Systems

部件名 MP8676DN
功能描述  4.5A, 42V, 420kHz Step-Down Converter with Synchronizable Gate Driver
PDF  10 Pages
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制造商  MPS [Monolithic Power Systems]
网页  http://www.monolithicpower.com
标志 MPS - Monolithic Power Systems

MP8676DN 数据表(HTML) 2 Page - Monolithic Power Systems

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MP8676 – 4.5A, 42V, 420KHZ STEP-DOWN WITH SYNCHRONIZABLE GATE DRIVER
MP8676 Rev.1.0
www.MonolithicPower.com
2
5/7/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
PACKAGE REFERENCE
Part Number*
Package
Temperature
MP8676DN
SOIC8E
–40
C to +85C
* For Tape & Reel, add suffix –Z (eg. MP8676DN–Z)
For RoHS Compliant Packaging, add suffix –LF
(eg. MP8676DN–LF–Z)
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN....................................... 45V
VSW...................... –0.3V (–5V for < 10ns) to 46V
VBST – VSW ...................................................... 6V
All Pins........................................... –0.3V to +6V
Junction Temperature...............................150
C
Lead Temperature ....................................260
C
Storage Temperature ..............–65
C to +150C
Recommended Operating Conditions
(2)
Supply Voltage VIN........................... 4.5V to 42V
Output Voltage Range……………
0.8V to 38V
Operating Temperature .............–40
C to +85C
Thermal Resistance
(3)
θJA
θJC
SOIC8E .................................. 50 ...... 10...
C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on JESD51-7, 4-layer PCB.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ
Max
Units
Feedback Voltage
VFB
4.5V
 VIN  42V
0.788
0.808
0.828
V
Feedback Current
IFB
VFB = 0.8V
10
nA
Switch On Resistance
(4)
RDS(ON)
100
mΩ
Switch Leakage
VEN = 0V, VSW = 0V
0.1
10
μA
Current Limit
(4)
IO-MAX
Duty=40%
6.5
A
Oscillator Frequency
fSW
VFB = 0.6V
240
420
600
kHz
Fold-back Frequency
VFB = 0V
25
115
205
kHz
Maximum Duty Cycle
VFB = 0.6V
85
90
%
Minimum On Time
(4)
tON
100
ns
Under Voltage Lockout Threshold Rising
3.90
4.10
4.30
V
Under Voltage Lockout Threshold Hysteresis
880
mV
EN Input Low Voltage
0.4
V
EN Input High Voltage
2
V
EN Input Current
VEN = 2V
2
μA
VEN = 0V
0.1
Sync Frequency Range (Low)
FSYNCL
300
KHz
Sync Frequency Range (High)
FSYNCH
1.5
MHz
Enable Turnoff Delay
TOFF
5.0
μs
Supply Current (Shutdown)
VEN = 0V
1
10
μA
Supply Current (Quiescent)
VEN = 2V, VFB = 1V
0.9
1.1
mA
Thermal Shutdown
150
°C
BG Driver Bias Supply Voltage
VCC
ICC = 5mA
4.5
5.0
V
Gate Driver Sink Impedance
(4)
RSINK
1
Ω
Gate Driver Source Impedance
(4)
RSOURCE
4
Ω
Gate Drive Current Sense Trip Threshold
VSW
20
mV
Note:
4) Guaranteed by design.
SW
BST
VCC
BG
IN
EN/SYNC
FB
GND
1
2
3
4
8
7
6
5
TOP VIEW
EXPOSED PAD
ON BACKSIDE



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