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PDF EV1517DR-00A Data sheet ( Hoja de datos )
| Número de pieza | EV1517DR-00A | |
| Descripción | Step-Up Converter | |
| Fabricantes | MPS | |
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TM
The Future of Analog IC Technology TM
GENERAL DESCRIPTION
The EV1517DR-00A is the evaluation board for
the MP1517, a 3A, fixed frequency step-up
converter ideal for medium-to-high current
step-up applications. The high 1.1MHz
switching frequency allows for smaller external
components producing a compact solution for
size constrained cameras, PDAs and cell
phones. The low 0.7V feedback voltage offers
higher efficiency in white LED driver
applications including cell phone camera flash.
The MP1517 regulates the output voltage up to
25V with efficiencies greater than 90%.
Soft-start, cycle-by-cycle current limiting, and
input under voltage lockout prevent
overstressing or damage to sensitive external
circuitry at startup and output short-circuit
conditions. Current-mode regulation and
external compensation components allow the
MP1517 control loop to be optimized over a
wide variety of input voltage, output voltage,
and load current conditions. The MP1517 is
available in the thermally enhanced QFN16
(4mm x 4mm) package.
ELECTRICAL SPECIFICATIONS
Parameter
Input Voltage
Output Voltage
Output Current
Symbol
VIN
VOUT
IOUT
Value
5
12
1
Units
V
V
A
EV1517DR-00A
3A, 25V, 1.1MHz
Step-Up Converter
EVALUATION BOARD
FEATURES
• 4A Peak Current Limit
• Low 700mV Feedback Threshold
• Internal 150mΩ Power Switch
• Input Range of 2.6V to 25V
• Over 90% Efficiency
• Zero Current Shutdown Mode
• Under Voltage Lockout Protection
• Open Load Protection
• Soft-Start Operation
• Thermal Shutdown
• Tiny 4mm x 4mm 16-Pin QFN Package
APPLICATIONS
• Boost and SEPIC Regulators
• Handheld Computers
• Cell Phone Camera Flash, PDAs
• Digital Still and Video Cameras
“MPS” and “The Future of Analog IC Technology”, are Trademarks of Monolithic
Power Systems, Inc.
EV1517DR-00A EVALUATION BOARD
Dimensions (2.0”X x 2.0”Y x 0.4”Z)
Board Number
EV1517DR-00A
MPS IC Number
MP1517DR
Efficiency vs
Load Current
100
95
90 VOUT = 12V
85
80
75
70
65 VOUT = 18V
60
55
50
1
VIN = 5V
10 100 1000
LOAD CURRENT (mA)
MP1517-EC01
EV1517DR-00A Rev. 1.0
6/8/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
1
1 page  
TM
EV1517DR-00A – 3A, 25V, 1.1MHz STEP-UP CONVERTER
EVALUATION BOARD
QUICK START GUIDE
The output voltage of this board is set to 12V. The board layout accommodates most commonly used
inductors and output capacitors.
1. Preset Power Supply to 2.6V ≤ VIN ≤ 6V.
2. Turn Power Supply off.
3. Connect Power Supply terminals to:
Positive (+): VIN, EN
Negative (–): GND
4. Connect Load to:
Positive (+): VOUT
Negative (–): GND
5. Turn Power Supply on after making connections.
6. The MP1517 is enabled on the evaluation board once VIN is applied. To disable the MP1517,
disconnect EN from VIN.
7. The output voltage VOUT can be changed by varying R1. Calculate the new value using the
formula:
R1
=
⎜⎜⎝⎛
VOUT
VFB
− 1⎟⎟⎠⎞R2
Where VFB = 0.7V and R2 = 10kΩ
For example, for VOUT = 15V
R1 =
⎜⎛
⎝
15V
0.7V
− 1⎟⎞ × 10kΩ
⎠
=
204.3kΩ
Therefore use a 205kΩ standard 1% value resistor.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
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.
EV1517DR-00A Rev. 1.0
6/8/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
5
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