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データシート MP1584 PDF ダウンロード


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部品番号 MP1584
部品説明 Step-Down Converter
メーカ MPS
ロゴ MPS ロゴ 
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MP1584 Datasheet, MP1584 PDF,ピン配置, 機能
The Future of Analog IC Technology
DESCRIPTION
The MP1584 is a high frequency step-down
switching regulator with an integrated internal
high-side high voltage power MOSFET. It
provides 3A output with current mode control for
fast loop response and easy compensation.
The wide 4.5V to 28V input range accommodates
a variety of step-down applications, including
those in an automotive input environment. A
100µA operational quiescent current allows use in
battery-powered applications.
High power conversion efficiency over a wide
load range is achieved by scaling down the
switching frequency at light load condition to
reduce the switching and gate driving losses.
The frequency foldback helps prevent inductor
current runaway during startup and thermal
shutdown provides reliable, fault tolerant
operation.
By switching at 1.5MHz, the MP1584 is able to
prevent EMI (Electromagnetic Interference) noise
problems, such as those found in AM radio and
ADSL applications.
The MP1584 is available in a thermally enhanced
SOIC8E package.
TYPICAL APPLICATION
C4
100nF
8
VIN
7 VIN
BST
SW 1
EN
2 EN
FB 4
MP1584
6 FREQ
COMP 3
GND
5
D1
C3
220pF
C6
NS
MP1584
3A, 1.5MHz, 28V
Step-Down Converter
FEATURES
Wide 4.5V to 28V Operating Input Range
Programmable Switching Frequency from
100kHz to 1.5MHz
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.
VOUT
3.3V
Efficiency Curve
(fSW=500kHz)
100
90 VIN=12V
80
70
60
VIN=24V
50
40
30
20
10
0
0.01
0.1
1
OUTPUT CURRENT (A)
10
MP1584 Rev. 1.0
8/8/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1

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MP1584 pdf, 電子部品, 半導体, ピン配列
MP1584 – 3A, 1.5MHz, 28V STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25C, unless otherwise noted.
Parameter
Symbol Condition
Min
Feedback Voltage
Upper Switch On Resistance
Upper Switch Leakage
Current Limit
COMP to Current Sense
Transconductance
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
0.776
4.0
ICOMP = ±3µA
VFB = 0.7V
VFB = 0.9V
0V < VFB < 0.8V
RFREQ = 100k
VEN = 0V
No load, VFB = 0.9V
40
2.7
Thermal Shutdown Hysteresis
Minimum Off Time (5)
Minimum On Time (5)
EN Up Threshold
EN Hysteresis
1.35
Note:
5) Guaranteed by design.
Typ
0.8
150
1
4.7
9
200
60
5
–5
3.0
0.35
1.5
900
12
100
150
15
100
100
1.5
300
Max
0.824
Units
V
m
μA
A
A/V
80
3.3
20
125
1.65
V/V
µA/V
µA
µA
V
V
ms
kHz
µA
µA
C
C
ns
ns
V
mV
MP1584 Rev. 1.0
8/8/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3





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