MPS EV1477-TF-00B User manual

EV1477-TF-00B
High-Efficiency, 800kHz,3A, 17V.
Step-Down Converter Evaluation Board
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 1
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
DESCRIPTION
The EV1477-TF-00B Evaluation Board is
designed to demonstrate the capabilities of
MPS’ MP1477, a fully-integrated high-frequency,
synchronous rectified, step-down, switch-mode
converter with internal power MOSFETs. It
offers a very compact solution to achieve a 3A
continuous output current over a wide input
range, with excellent load and line regulation.
The MP1477 has synchronous-mode operation
for higher efficiency over the output current-load
range.
Constant On-Time control operation provides
very fast transient response and easy loop
design as well as very tight output regulation.
Full protection features include SCP, OCP,
UVP, and thermal shutdown.
The MP1477 requires a minimal number of
readily-available, standard, external
components and is available in a space-saving
SOT563 (1.6mmх1.6mm) package.
ELECTRICAL SPECIFICATION (1)
Parameter
Symbol
Value
Units
Input Voltage
VIN
12
V
Output Voltage
VOUT
3.3
V
Output Current
IOUT
3
A
Notes:
1) For different Input/output voltage specs and different output
capacitor/inductor may need change the application circuit
parameters.
FEATURES
Wide 4.2V-to-17V Operating Input Range
58mΩ/25mΩ Low-RDS(ON) Internal Power
MOSFETs
180µA Low IQ Current
High-Efficiency Synchronous-Mode
Operation
Power Save Mode at Light Load
Fast Load Transient Response
800kHz Switching Frequency
Internal Soft-Start
Over-Current Protection and Hiccup
Thermal Shutdown
Output Adjustable from 0.8V
Available in a SOT563(1.6mmх1.6mm)
package
APPLICATIONS
Security Camera
Digital Set-Top Boxes
Flat-Panel Television and Monitors
General Purposes
All MPS parts are lead-free, halogen free, and adhere to the RoHS
directive. For MPS green status, please visit MPS website under Quality
Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
EV1477-TF-00B EVALUATION BOARD
(L x W x H) 63.7mm x 48.4mm x 6.4mm
Board Number
MPS IC Number
EV1477-TF-00B
MP1477GTF

EV1477-TF–00B 17V, 800kHz, 3A, STEP-DOWN CONVERTER
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 2
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC
10
75K
2.2µH
100K
C5
NS
+C1C
NS
R6
NS
C6
NS
R7
10
MP1477
22uF
3.3V/3A
15pF
EV1477-TF-00B BILL OF MATERIALS
Qty
Ref
Value
Description
Package
Manufacturer
Part Number
1
C1A
22μF
Ceramic Cap., 25V,
X5R
0805
muRata
GRM21BR61E226ME44L
1
C1B
0.1μF
Ceramic Cap., 25V,
X7R
0603
muRata
GRM188R71E104KA01D
2
C2,C2A
22μF
Ceramic Cap., 16V,
X5R
0805
muRata
GRM21BR61C226ME44L
1
C3
1μF
Ceramic Cap., 16V,
X7R
0603
muRata
GRM188R71C105KA12D
0
C1,C1C,
C5,C6
NS
1
C4
15pF
Ceramic Cap., 50V,
C0G
0603
muRata
GRM1885C1H150JA01D
1
R1
40.2k
Thick Film Res., 1%
0603
Yageo
RC0603FR-0740K2L
1
R2
13k
Thick Film Res., 1%
0603
Yageo
RC0603FR-0713KL
1
R3
75k
Thick Film Res., 1%
0603
Yageo
RC0603FR-0775KL
1
R5
100k
Thick Film Res., 1%
0603
Yageo
RC0603FR-07100KL
2
R4,R7
10Ω
Thick Film Res., 1%
0603
Yageo
RC0603JR-0710RL
0
R6
NS
1
L1
2.2μH
Inductor,
DCR=12mΩ,Is=14A
SMD
Wurth
74437349022
1
U1
MP1477GTF
Synchronous Step-
Down Convert
SOT563
MPS
MP1477GTF

EV1477-TF–00B 17V, 800kHz, 3A, STEP-DOWN CONVERTER
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 3
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
EVB TEST RESULTS
VIN =12V, VOUT =3.3V, L = 2.2µH, TA= +25°C, unless otherwise noted.

EV1477-TF–00B 17V, 800kHz, 3A, STEP-DOWN CONVERTER
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 4
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
EVB TEST RESULTS (continued)
VIN =12V, VOUT =3.3V, L = 2.2µH, TA= +25°C, unless otherwise noted.

EV1477-TF–00B 17V, 800kHz, 3A, STEP-DOWN CONVERTER
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 5
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
EVB TEST RESULTS (continued)
VIN =12V, VOUT =3.3V, L = 2.2µH, TA= +25°C, unless otherwise noted.

EV1477-TF–00B 17V, 800kHz, 3A, STEP-DOWN CONVERTER
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 6
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
PRINTED CIRCUIT BOARD LAYOUT
Figure1: Top Silk Layer Figure2: Top Layer
Figure3: Bottom Layer

EV1477-TF-00B –17V, 800kHz, 3A, STEP-DOWN CONVERTER
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.
EV1477-TF-00B Rev.1.0 www.MonolithicPower.com 7
8/11/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
QUICK START GUIDE
1. Preset Power Supply to12V.
2. Turn Power Supply off.
3. Connect Power Supply terminals to:
a. Positive (+): VIN
b. Negative (–): GND
4. Connect Load to:
a. Positive (+): VOUT
b. Negative (–): GND
5. Turn Power Supply on after making connections. The board will automatically start up.
6. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.3V to turn
on the regulator, or less than 1V to turn it off.

Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Monolithic Power Systems (MPS):
EV1477-TF-00B