Linear Technology DC1900A Demo Manual page 3

Quick start proceDure
95
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79
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0
V
OUT1
200mV/DIV
I
OUT1
2A/DIV
V = 12V
IN
V
OUT
2× 47µF/6.3V/CERAMIC
LOAD STEP SLEW RATE = 1A/µs
Figure 3. Measured V
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5V
IN
3.3V
OUT1
2.5V
OUT2
1.5V
OUT3
1.2V
OUT4
1 2 3 4
LOAD CURRENT (A)
DC1900A F01a
Figure 2. Measured Supply Efficiency at 5V
DC1900A F03a
20µs/DIV
= 3.3V
= 3.3V and V
OUT1
V = 12V
IN
V = 3.3V, V
OUT1
NATURAL CONVECTION
AMBIENT TEMPERATURE = 31.2°C
Figure 4. Measured Thermal Capture with All Phases at Full Load (4A)
DEMO MANUAL DC1900A
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V
OUT4
200mV/DIV
I
OUT4
2A/DIV
= 1.2V Load Transient Responses (2A to 4A Load Step)
OUT4
= 2.5V, V = 1.5V, V = 1.2V
OUT2 OUT3 OUT4
3.3V
OUT1
2.5V
OUT2
1.5V
OUT3
1.2V
OUT4
0 1 2 3
LOAD CURRENT (A)
and 12V
IN IN
20µs/DIV
V = 12V
IN
V = 1.2V
OUT
2× 47µF/6.3V/CERAMIC
LOAD STEP SLEW RATE = 1A/µs
DC1900A F04
12V
IN
4
DC1900A F01b
DC1900A F03b
dc1900af
3