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PDF EV1593DN-00A Data sheet ( Hoja de datos )
| Número de pieza | EV1593DN-00A | |
| Descripción | Up to 3A Output Step-Down DC/DC Converter | |
| Fabricantes | MPS | |
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Monolithic Power Systems
EV1593DN-00A (MP1593)
4.75V to 28V Input, Up to 3A Output
Step-Down DC/DC Converter
EVALUATION BOARD - INITIAL RELEASE
GENERAL DESCRIPTION
The EV1593DN-00A is the Evaluation Board for
MPS’ MP1593 Step-Down DC/DC Converter. It
features a wide supply range of 4.75V to 28V
and a continuous output current up to 3A. The
output voltage is set to 3.3V, but can be easily
adjusted to other levels from 1.22V. A 385KHz
high switching frequency allows the use of
small, low cost capacitors and inductors.
Current mode control and an integrated power
MOSFET minimize component count, board area,
and solution cost. Fault condition protection
includes cycle-by-cycle current limiting, thermal
shutdown, and under-voltage lockout. Internal
soft-start reduces the turn-on stress. The small
but thermally enhanced 8-pin SOIC package
minimizes board area and provides excellent
thermal management.
FEATURES
• Up to 3A Output Current
• Wide 4.75 to 28V Operating Input Range
• Monolithic Buck with 100mΩ Internal FET
• Fixed 385KHz Frequency
• All Ceramic Input and Output Capacitors
• Programmable Soft-Start
• Programmable Input Under-Voltage Lockout
APPLICATIONS
• Distributed Power Systems
• Battery Charger
• Pre-Regulator for Linear Regulators
, “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
ELECTRICAL SPECIFICATION
Parameter
Supply Voltage
Output Voltage
Output Current
Symbol
VIN
VOUT
IOUT
Value
4.75 – 28
3.3
0–3
Units
V
V
A
EV1593DN-00A EVALUATION BOARD
(2.1”X x 1.3”Y x 0.4”Z)
Board Number
EV1593DN-00A
MPS IC Number
MP1593
Efficiency vs
Load Current
100
95 VIN = 9V
90
85 VIN = 24V
80
75
VIN = 12V
70
65
60
55
50
0
500 1000 1500 2000 2500 3000 3500
LOAD CURRENT (mA)
EV1593_TAC _EC01
08/04, Rev. 1.0
www.MonolithicPower.com
1
1 page  
EV1593DN-00A – 4.75V-28V INPUT, UP TO 3A OUTPUT STEP-DOWN CONVERTER
EVALUATION BOARD - INITIAL RELEASE
QUICK START GUIDE
1. Connect the positive terminal of the load to VOUT pins, and the negative terminal of the load to
GND pins
2. Preset the power supply output to 4.75V – 28V and turn off the power supply.
3. Connect the positive terminal of the power supply output to the VIN pin and the negative
terminal of the power supply output to the GND pin
4. Turn the power supply on. The MP1593 will automatically startup.
5. To use the Enable function, apply a digital input to EN pin. Drive EN higher than 2.5V to turn on
the regulator, drive EN less than 0.7V to turn it off.
6. An input under voltage lockout (UVLO) function can be implemented by the addition of a resistor
divider R4 and R5.
The
EN
threshold
is
2.5V,
so
VIN
UVLO
threshold
is
⎜⎛1 +
⎝
R4
R5
⎟⎞
⎠
×
2.5V
.
RECOMMENDED COMPONENTS FOR STANDARD OUTPUT VOLTAGES
The output voltage of this board is set to 3.3V.
This board is laid out to accommodate most
commonly used inductors and output capacitors
and to be programmed for most standard output
voltages. The following table lists recommended
components for some standard output voltages.
Listed compensation components (R2, C3)
values are based on the output capacitor
installed on this board. For other capacitors,
refer to the Application Information section in
the MP1593 datasheet.
Table 1—Recommended Components for Standard Output Voltages
VOUT
1.8V
2.5V
3.3V
5V
12V
R1
4.75kΩ
10.5kΩ
16.9kΩ
30.9kΩ
88.7kΩ
R2
3kΩ
3.9kΩ
5.6kΩ
7.5kΩ
10kΩ
C3
4.7nF
5.6nF
8.2nF
10nF
3.3nF
L1
4.7µH
4.7-6.8µH
6.8-10µH
10-15µH
15-22µH
NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without
notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual
Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal
responsibility for any said applications.
EV1593DN-00A (MP1593) Rev. 1.0
Monolithic Power Systems, Inc.
8/4/04
983 University Avenue, Building A, Los Gatos, CA 95032 USA
© 2004 MPS, Inc.
Tel: 408-357-6600 ♦ Fax: 408-357-6601 ♦ www.MonolithicPower.com
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