Datasheet

www.ti.com Demonstration Board Schematic and PCB
Figure 4. LM3103 Demonstration Board PCB Bottom View
Table 1. Demonstration Board Quick Setup Procedures
Step Description Notes
1 Connect a power supply to VIN terminals V
IN
range: 8V to 42V
2 Connect a load to VOUT terminals I
OUT
range: 0A to 0.75A
3 SD (JP1) should be left open for normal operation. Short this jumper to
shutdown
4 Set V
IN
= 18V, with 0A load applied, check V
OUT
with a voltmeter Nominal 3.3V
5 Apply 0.75A load and check V
OUT
Nominal 3.3V
6 Short output terminals and check the short circuit current with an ammeter Nominal 1.05A
7 Short SD (JP1) to check the shutdown function
Table 2. Demonstration Board Performance Characteristic
Description Symbol Condition Min Typ Max Unit
Input Voltage V
IN
8 18 42 V
Output Voltage V
OUT
3.2 3.3 3.4 V
Output Current I
OUT
0 - 0.75 A
Output Voltage Ripple V
OUT(Ripple)
- - 50 mVp-p
Output Voltage Regulation ΔV
OUT
ALL V
IN
and I
OUT
Conditions -2 +2 %
Efficiency V
IN
= 8V 85 91 %
V
IN
= 24V 71 84 %
V
IN
= 42V 59 78 %
(I
OUT
= 0.1A to 0.75A)
Output Short Current Limit I
LIM-SC
1.05 A
3
SNVA268A–October 2007–Revised April 2013 AN-1678 LM3103 Demonstration Board Reference Design
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