Datasheet

LTC3863
5
3863f
For more information www.linear.com/3863
TYPICAL PERFORMANCE CHARACTERISTICS
Transient Response:
Pulse-Skipping Mode Operation
Transient Response: Rising Edge
Pulse-Skipping Mode Operation
Transient Response: Falling Edge
Pulse-Skipping Mode Operation
Normal Soft-Start
Soft-Start into a Prebiased
Output Output Tracking
Pulse-Skipping Mode Operation
Waveforms
Burst Mode Operation
Waveforms
Transient Response:
Burst Mode Operation
T
A
= 25°C, unless otherwise noted.
V
IN
= 12V
V
OUT
= –5V
I
LOAD
= 100mA
FIGURE 7 CIRCUIT
V
SW
10V/DIV
V
OUT
50mV/DIV
I
L
500mA/DIV
2µs/DIV
3863 G01
V
IN
= 12V
V
OUT
= –5V
I
LOAD
= 100mA
FIGURE 7 CIRCUIT
V
SW
10V/DIV
V
OUT
50mV/DIV
I
L
500mA/DIV
20µs/DIV
3863 G02
V
IN
= 12V
V
OUT
= –5V
TRANSIENT = 100mA TO 1.6A
FIGURE 7 CIRCUIT
V
OUT
200mV/DIV
I
LOAD
1A/DIV
I
L
1A/DIV
100µs/DIV
3863 G03
V
IN
= 12V
V
OUT
= –5V
TRANSIENT = 100mA TO 1.6A
FIGURE 7 CIRCUIT
V
OUT
200mV/DIV
I
LOAD
1A/DIV
I
L
1A/DIV
100µs/DIV
3863 G04
V
IN
= 12V
V
OUT
= –5V
TRANSIENT = 100mA TO 1.6A
FIGURE 7 CIRCUIT
V
OUT
200mV/DIV
I
LOAD
1A/DIV
I
L
1A/DIV
10µs/DIV
3863 G05
V
IN
= 12V
V
OUT
= –5V
TRANSIENT = 1.6A TO 100mA
FIGURE 7 CIRCUIT
V
OUT
200mV/DIV
I
LOAD
1A/DIV
I
L
1A/DIV
10µs/DIV
3863 G06
V
IN
= 12V
V
OUT1
= 5V
V
OUT2
= –5V
I
LOAD1
= I
LOAD2
= 100mA
FIGURE 11 CIRCUIT
V
OUT1
2V/DIV
V
OUT2
2V/DIV
V
IN
5V/DIV
TRACK/SS
200mV/DIV
1ms/DIV
3863 G07
V
IN
= 12V
V
OUT1
= 5V, V
OUT2
= –5V
PRE-BIAS1 = 2V, PRE-BIAS2 = –2V
I
LOAD
= 50mA
FIGURE 11 CIRCUIT
V
OUT1
2V/DIV
V
OUT2
2V/DIV
RUN
5V/DIV
TRACK/SS
200mV/DIV
1ms/DIV
3863 G08
V
IN
= 12V
V
OUT1
= 5V
V
OUT2
= –5V
I
LOAD1
= I
LOAD2
= 100mA
FIGURE 11 CIRCUIT
V
OUT1
2V/DIV
V
OUT2
2V/DIV
TRACK/SS
200mV/DIV
20ms/DIV
3863 G09