Datasheet

LTC3839
5
3839fa
TYPICAL PERFORMANCE CHARACTERISTICS
Transient Response
(Discontinuous Mode)
Load Release with Detect Transient (DTR)
Feature Enabled
Load Release with Detect Transient (DTR)
Feature Disabled
Load Step
(Discontinuous Mode)
Load Release
(Discontinuous Mode)
Transient Response
(Forced Continuous Mode)
Load Step
(Forced Continuous Mode)
Load Release
(Forced Continuous Mode)
I
LOAD
20A/DIV
I
L1
10A/DIV
I
L2
10A/DIV
50µs/DIV
3839 G01
LOAD TRANSIENT = 0A TO 30A
V
IN
= 12V
V
OUT
= 1.2V
FIGURE 17 CIRCUIT
V
OUT
50mV/DIV
I
LOAD
20A/DIV
I
L1
10A/DIV
I
L2
10A/DIV
5µs/DIV
3839 G02
LOAD STEP = 0A TO 30A
V
IN
= 12V
V
OUT
= 1.2V
FIGURE 17 CIRCUIT
V
OUT
50mV/DIV
I
LOAD
20A/DIV
I
L1
10A/DIV
I
L2
10A/DIV
50µs/DIV
3839 G04
LOAD TRANSIENT = 750mA TO 30A
V
IN
= 12V
V
OUT
= 1.2V
FIGURE 17 CIRCUIT
V
OUT
50mV/DIV
I
LOAD
20A/DIV
I
L1
10A/DIV
I
L2
10A/DIV
5µs/DIV
3839 G05
LOAD STEP = 750mA TO 30A
V
IN
= 12V
V
OUT
= 1.2V
FIGURE 17 CIRCUIT
V
OUT
50mV/DIV
SW1
5V/DIV
SW2
5V/DIV
I
LOAD
20A/DIV
V
OUT
20mV/DIV
AC-COUPLED
2µs/DIV
3839 G07
BACK PAGE APPLICATION CIRCUIT
LOAD RELEASE = 30A TO 10A
V
IN
= 5V
V
OUT
= 0.6V
SHADING OBTAINED WITH INFINITE PERSISTENCE ON
OSCILLOSCOPE WAVEFORMS
I
LOAD
20A/DIV
I
L2
10A/DIV
I
L1
10A/DIV
5µs/DIV
3839 G03
LOAD RELEASE = 30A TO 0A
V
IN
= 12V
V
OUT
= 1.2V
FIGURE 17 CIRCUIT
V
OUT
50mV/DIV
I
LOAD
20A/DIV
I
L1
10A/DIV
I
L2
10A/DIV
5µs/DIV
3839 G06
LOAD RELEASE = 30A TO 750mA
V
IN
= 12V
V
OUT
= 1.2V
FIGURE 17 CIRCUIT
V
OUT
50mV/DIV
SW1
5V/DIV
SW2
5V/DIV
I
LOAD
20A/DIV
V
OUT
20mV/DIV
AC-COUPLED
2µs/DIV
3839 G08
BACK PAGE APPLICATION CIRCUIT,
MODIFIED: R
ITH
= 16.5k (≈36.5k/30.1k)
LOAD RELEASE = 30A TO 10A
V
IN
= 5V
V
OUT
= 0.6V