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部品番号 MP1586
部品説明 Step-Down Converter
メーカ MPS
ロゴ MPS ロゴ 
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MP1586 Datasheet, MP1586 PDF,ピン配置, 機能
MP1586
The Future of Analog IC Technology
DESCRIPTION
The MP158 6 is a h igh f requency step -down
switching r egulator with a n integrated internal
high-side h igh vo ltage power M OSFET. I t
provides 3A output with current mode control for
fast loop response and easy compensation.
The wide 4.5V to 28V input range accommodates
a var iety of st ep-down ap plications, including
those in an au tomotive inpu t env ironment. A
115µA operational quiescent current allows use in
battery-powered applications.
High pow er co nversion ef ficiency over a wid e
load range is ac hieved b y sc aling do wn th e
switching f requency at li ght lo ad co ndition to
reduce the switching and gate driving losses.
The fr equency f oldback he lps prevent indu ctor
current run away during sta rtup and thermal
shutdown provides r eliable, fa ult tolerant
operation.
The MP1586 is available in a thermally enhanced
SOIC8E package.
3A, 28V, 50kHz to 400kHz
Step-Down Converter
FEATURES
Wide 4.5V to 28V Operating Input Range
Programmable Switching Frequen cy from
50kHz to 400kHz
High-Efficiency Pulse Skipping Mode for
Light Load
Ceramic Capacitor Stable
Internal Soft-Start
Internally Set Current Limit without a
Current Sensing Resistor
Available in SOIC8E Package.
APPLICATIONS
High Voltage Power Conversion
Automotive Systems
Industrial Power Systems
Distributed Power Systems
Battery Powered Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
C4
100nF
8
VIN
7 VIN
BST
SW 1
D1
EN 2 EN MP1586 FB 4
6 FREQ
COMP 3
GND
5
C3
820pF
C6
NS
Efficiency vs.
Load Current
VOUT=5V,FSW=250kHz
100 VIN=8V
VOUT
5V
90
80
VIN=12V
70 VIN=24V
60
50
40
0.01
0.1 1
LOAD CURRENT(A)
10
MP1586 Rev. 0.91
1/8/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
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MP1586 pdf, 電子部品, 半導体, ピン配列
MP1586 – 3A, 28V, 50kHz TO 400kHz STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25°C, unless otherwise noted.
Parameter Sy
mbol Condition
Min Typ
Feedback Voltage
Upper Switch On Resistance(5)
Upper Switch Leakage
Current Limit
COMP to Current Sense
Transconductance(5)
Error Amp Voltage Gain (5)
Error Amp Transconductance
Error Amp Min Source current
Error Amp Min Sink current
VIN UVLO Threshold
VIN UVLO Hysteresis
Soft-Start Time (5)
Oscillator Frequency
Shutdown Supply Current
Quiescent Supply Current
Thermal Shutdown
VFB
RDS(ON)
4.5V < VIN < 28V
VBST – VSW = 5V
VEN = 0V, VSW = 0V, VIN = 28V
GCS
ICOMP = ±3µA
VFB = 0.7V
VFB = 0.9V
0V < VFB < 0.8V
RFREQ =100k
VEN = 0V
No load, VFB = 0.9V
0.776
4.0
0.8
150
1
4.7
9
200
40 60
5
–5 µA
2.7 3.0
0.35
1.5
200 250 300
12
115
150
Thermal Shutdown Hysteresis
Minimum Off Time (5)
Minimum On Time (5)
EN Up Threshold
EN Hysteresis
15
100
100
1.35 1.5
300
Note:
5) Guaranteed by design.
Max
0.824
80
3.3
20
145
1.65
Units
V
m
μA
A
A/V
V/V
µA/V
µA
V
V
ms
kHz
µA
µA
°C
°C
ns
ns
V
mV
MP1586 Rev. 0.91
1/8/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
3





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