E522.01 EVALUATION KIT
AN 018
AUG 17, 2011
E522.01 High Frequency Low Power Step Down Converter Evaluation Kit
Figure 1: Evaluation Board
1 What you get
Evaluation board with low power step down converter E522.01, capable of 5.5V to 40V input voltage VIN, providing
5V output voltage VOUT up to 500mA load current.
2 What you need in addition
An external power supply for input voltage VIN between 5.5V and 40V
3 Connectors
The connection is like a standard voltage regulator (pin 1 : VIN, pin 2 : GND, pin 3 : VOUT)
1
2
3
Figure 2: Connectors
4 Start of operation
1. Connect a power supply between VIN and GND
2. +5V is now provided between VOUT and GND with maximum 500mA load
ELMOS Semiconductor AG
Application Note 1/3
QM-No.: 25AN0018E.01
E522.01 EVALUATION KIT
AN 018
AUG 17, 2011
5 Schematic
1206CS-030XJLB
J1
L1
PGND
C1
2n2
CON3
C3
100n
PGND
PGND
21
EP
C6
10µ
PGND
PGND
IC1
VIN
LXT
NC
PGND
522XX_QFN
ON
NC
NC
SENSE
PG
SENSE
15
14
13
12
11
D1
PGND
L2
22µH (LPS6225-223MLB)
SS14
6
7
8
9
10
AGND
NC
NC
NC
OCP
1
2
3
4
5
C5
10µ
PGND
PGND
20
19
18
17
16
R1
0R
C4
10µ
C2
2n2
NC
NC
NC
NC
NC
3
2
1
R3
24k
CE1
100u/35V FK
C7
100n
R4
3k3
PGND
PGND
AGND
Figure 2: Schematic
6 Bill of Material
Pos.-No.
Unit/Description Ordering No.
Distributor
Comment
Manufacturer
R3
24k, 5%
P24KGTR-ND
Digi-Key
0603,1/10W
Panasonic – ECG
R4
3.3k, 5%
P3.3KGTR-ND
Digi-Key
0603, 1/10W
Panasonic – ECG
C1
2.2nF, 20%
445-5083-2-ND
Digi-Key
0603, X7R, 50V
TDK
C2
2.2nF, 20%
445-5083-2-ND
Digi-Key
0603, X7R, 50V
TDK
C3
100nF, 10%
445-1314-2-ND
Digi-Key
0603, X7R, 50V
TDK
C4
10uF, -20%.+.80%
445-3483-2-ND
Digi-Key
1812, Y5V, 50V
TDK
C5
10uF, -20%.+.80%
445-3483-2-ND
Digi-Key
1812, Y5V, 50V
TDK
C6
10uF, -20%.+.80%
445-3483-2-ND
Digi-Key
1812, Y5V, 50V
TDK
C7
100nF, 10%
445-1314-2-ND
Digi-Key
0603, X7R, 50V
TDK
CE1
100uF, ±20%, 35V
VF 100/35 K-D8
Reichelt
6,3x7,7, ESR=180mΩ
Panasonic VFK
L1
choke 2.2nH @
100MHz
1206CS-030XJLB
Coilcraft
1206
Coilcraft
L2
22uH, ±20%
LPS6225-223ML
Coilcraft
6mm x 6mm, Irms=0.8A
Coilcraft
D1
SS14-E3/61T
1557266
Farnell
Schottky, 1A, 40V, SMA
Vishay
alternative D1
15MQ040NTRPBF
1463215
Farnell
Schottky, 2A, 40V, SMA
IR Rectifier /
Vishay
IC1
E522.0x
E522.0x
ELMOS
QFN20L4
ELMOS
J1
pin strip angled
SL 1x36W 2,54
Reichelt
3 of 36 pins used
misc
ELMOS Semiconductor AG
Application Note
2/3
QM-No.: 25AN0018E.01
Usage restrictions
ELMOS Semiconductor AG provide the E522.01 Evaluation Kit simply and solely for IC evaluation purposes in laboratory. The Kit or any part of the Kit must not be used for other purposes or within non laboratory environments. Especially the use or the integration in production systems, appliances or other installations is prohibited.
Disclaimer
ELMOS Semiconductor AG shall not be liable for any damages arising out of defects resulting from (1) delivered hardware or software, (2) non observance of instructions contained in this document, or (3) misuse, abuse, use under
abnormal conditions or alteration by anyone other than ELMOS Semiconductor AG. To the extend permitted by law
ELMOS Semiconductor AG hereby expressively disclaims and user expressively waives any and all warranties of merchantability and of fitness for a particular purpose, statutory warranty of non-infringement and any other warranty
or product liability that may arise by reason of usage of trade, custom or course of dealing.
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Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 159
sales@elmos.de | www.elmos.de
Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any
circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication
has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of
the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.
Copyright © 2011 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
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