Linear Technology DC2194A Demo Manual page 9

Quick start proceDure
20MHz BWL
V
OUT
50mV/DIV
f = 800kHz
SW
V = 12V, V = 1.8V
IN OUT
I = 4A
LOAD
C = 1×150µF/4V/7m
OUT_POSCAP
C = 1×22µF/10V/X7R/1206
OUT_CERAMIC
C = 220pF
FF
Figure 8a. Output Ripple Voltage (CH1),
Dual Phase Dual Outputs
V
OUT
50mV/DIV
I
LOAD
2A/DIV
f = 800kHz
SW
V = 12V, V = 1.8V
IN OUT
I STEP = 4A TO 6A AT 2A/µs
LOAD
C = 1×100µF/6.3V/X5R/1206
OUT_CERAMIC
+ 1×47µF/6.3V/X5R/1206
C = 220pF
FF
Figure 9a. Load Transient Response,
Dual Phase Single Output
20MHz BWL
V
OUT
20mV/DIV
f = 800kHz
SW
V = 12V, V = 1.8V
IN OUT
I = 8A
LOAD
C = 1×100µF/6.3V/X5R/1206
OUT_CERAMIC
+ 1×47µF/6.3V/X5R/1206
C = 220pF
FF
Figure 10a. Output Ripple Voltage,
Dual Phase Single Output
V = 27mV
O_P-P
5µs/DIV
DC2194 F08a
V = 73mV
O_P-P
4A TO 6A
50µs/DIV
DC2194 F09a
V = 10mV
O_P-P
5µs/DIV
DC2194 F10a
DEMO MANUAL DC2194A
20MHz BWL
V
OUT
50mV/DIV
f = 800kHz
SW
V = 12V, V = 1.2V
IN OUT
I = 4A
LOAD
C = 1×150µF/4V/7m
OUT_POSCAP
C = 1×22µF/10V/X7R/1206
OUT_CERAMIC
C = 220pF
FF
Figure 8b. Output Ripple Voltage (CH2)
Dual Phase Dual Outputs
V
OUT
100mV/DIV
I
LOAD
5A/DIV
f = 800kHz
SW
V = 12V, V = 1.8V
IN OUT
I STEP = 4A TO 8A AT 4A/µs
LOAD
C = 1×100µF/6.3V/X5R/1206
OUT_CERAMIC
+ 1×47µF/6.3V/X5R/1206
C = 220pF
FF
Figure 9b. Load Transient Response,
Dual Phase Single Output
20MHz BWL
V
V
OUT
20mV/DIV
f = 800kHz
SW
V = 20V, V = 1.8V
IN OUT
I = 8A
LOAD
C = 1×100µF/6.3V/X5R/1206
OUT_CERAMIC
+ 1×47µF/6.3V/X5R/1206
C = 220pF
FF
Figure 10b. Output Ripple Voltage,
Dual Phase Single Output
V = 17mV
O_P-P
5µs/DIV
DC2194 F08b
V = 138mV
O_P-P
4A TO 8A
50µs/DIV
DC2194 F09b
= 10.6mV
O_P-P
5µs/DIV
DC2194 F10b
dc2194af
9