EV1584EN-00A - Monolithic Power Systems

EV1584EN-00A
3A, 28V, 1.5MHz
Step-Down Converter Evaluation Board
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The EV1584EN-00A is an evaluation board for
the MP1584, a high frequency step-down
regulator with an integrated power MOSFET.
•
•
•
•
The MP1584 integrates a 150mΩ MOSFET that
provides 3A load current over a wide operating
input voltage of 4.5V to 28V.
Current mode control provides fast transient
response and eases loop stabilization. An
internal soft-start prevents inrush current at
turn-on.
The EV1584EN-00A is a fully assembled and
tested PCB. It generates a +3.3V output voltage
at load current up to 3A from an 8V to 28V input
range. Switching frequency is set at 500KHz.
3A Output Current
Wide 8V to 28V Operating Input Range
Adjustable Output from 0.8V to 25V
Programmable Switching Frequency up to
1.5MHz
APPLICATIONS
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•
•
•
•
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Game Machines
Automotive Systems
Industrial Power Systems
Distributed Power Systems
Printer Systems
Battery Powered Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
Output Voltage
Output Current
Symbol
Value
Units
VIN
VOUT
IOUT
8 – 28
3.3
3
V
V
A
EV1584EN-00A EVALUATION BOARD
Efficiency Curve
100
(fSW=500kHz)
90
VIN=12V
EFFICIENCY (%)
80
70
60
VIN=24V
50
40
30
20
(L x W x H) 2.5” x 2.5” x 0.4”
(6.35cm x 6.35cm x 1.0cm)
Board Number
MPS IC Number
EV1584EN-00A
MP1584EN
EV1584EN-00A Rev. 1.0
9/22/2011
10
0
0.01
0.1
1
10
OUTPUT CURRENT (A)
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
EV1584EN-00A – 3A, 28V, 1.5MHz STEP-DOWN CONVERTER EV BOARD
MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY
EVALUATION BOARD SCHEMATIC
D1
NS
C5
100nF
D3
NS
8
7
VIN
VIN
BST
SW
1
DR1050-100-R
GND
C11
NS
D2
PDS560
2
EN
EN
MP1584
FB
VOUT
3.3V/3A
GND
4
C4
NS
6
FREQ
GND
COMP
3
C6
220pF
5
C10
NS
C7
NS
EV1584EN-00A BILL OF MATERIALS
Qty
Ref
Value
Description
2
2
4.7µF
0.1µF
Ceramic Cap., 50V, X7R
Ceramic Cap., 50V, X7R
1
1
1
1
1
1
1
1
1
1
2
1
C1, C2
C3, C9
C4,C7,
C10,C11
C5
C6
C8
R1
R2
R3
R4
R5
R6
R7
D1, D3
D2
1
L1
1
U1
4
NS
EV1584EN-00A Rev. 1.0
9/22/2011
Part Number
1210
0805
Murata
TDK
GRM32ER71H475KA88L
C2012X7R1H104K
0603
0603
1210
0603
0603
0603
0603
0603
0603
TDK
TDK
TDK
Yageo
Yageo
Yageo
Yageo
Yageo
Yageo
C1608X7R1H104K
C1608C0G1H221J
C3225X5R0J226M
RC0603FR-0724K9L
RC0603FR-07100KL
RC0603FR-07200KL
RC0603FR-0740K2L
RC0603FR-0751KL
RC0603FR-07124KL
PowerDI
SMD
SMD
SO8
Diodes Inc
Cooper
TOKO
MPS
PDS560
DR1050-100-R
D104-#919AS-100M
MP1584EN
Not Stuffed
100nF
220pF
22µF
24.9kΩ
100kΩ
200kΩ
40.2kΩ
51kΩ
124kΩ
NS
NS
10µH
Package Manufacturer
Ceramic Cap., 50V, X7R
Ceramic Cap., 50V, NPO
Ceramic Cap., 6.3V, X5R
Film Res., 1%
Film Res., 1%
Film Res., 1%
Film Res., 1%
Film Res., 1%
Film Res., 1%
Not Stuffed
Not Stuffed
Diode Schottky, 60V, 5A
Inductor, 4.58A
Inductor, 4.3A
Step-Down Regulator
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
2
EV1584EN-00A – 3A, 28V, 1.5MHz STEP-DOWN CONVERTER EV BOARD
MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY
PRINTED CIRCUIT BOARD LAYOUT
Figure 1—Top Silk Layer
Figure 2—Top Layer
Figure 3—Bottom Layer
EV1584EN-00A Rev. 1.0
9/22/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
EV1584EN-00A – 3A, 28V, 1.5MHz STEP-DOWN CONVERTER EV BOARD
MPS CONFIDENTIAL AND PROPRIETARY INFORMATION – INTERNAL USE ONLY
QUICK START GUIDE
1. Connect the positive and negative terminals of the load to the VOUT and GND pins,
respectively.
2. Preset the power supply output to between 8V and 28V, then turn it off.
3. Connect the positive and negative terminals of the power supply output to the VIN and GND
pins, respectively.
4. Turn the power supply on. The EV1584EN will automatically startup.
5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.6V to turn
on the regulator, drive EN less than 1.2V to turn it off.
6. An input under voltage lockout (UVLO) function is implemented by the addition of a resistor
divider R1 and R2. The EN threshold is 1.2V (falling edge), so VIN UVLO falling threshold is
R2 ⎞
⎛
1. 2 V × ⎜ 1 +
⎟ . It is preset to 6V on this board.
R1 ⎠
⎝
7. Use R4 and R6 to set the output voltage with VFB = 0.8V. For R4 = 40.2kΩ, R6 can be
determined by: R6 = 50.25 × (VOUT − 0.8 ) (kΩ). Follow the Application Information section in the
device datasheet to recalculate the compensation, inductor and output capacitor values when
output voltage is changed.
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
EV1584EN-00A Rev. 1.0
9/22/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
4