LTM4641
TYPICAL PERFORMANCE CHARACTERISTICS
(Figure 45 circuit with RfSET per Table 1 and RSET1A, RSET1B and RSET2 per Table 2, unless otherwise noted)
Output Start-Up,
Pre-Bias Condition
Output Short-Circuit,
No Initial Load
Output Start-Up, 10A Load
V
OUT
V
V
OUT
OUT
1V/DIV
1V/DIV
1V/DIV
I
LOAD
I
IN
1mA/DIV
1A/DIV
I
IN
I
IN
200mA/DIV
RUN
1A/DIV
RUN
5V/DIV
5V/DIV
4641 G11
4641 G12
4641 G10
800µs/DIV
= 2 × 10µF X7R
20µs/DIV
800µs/DIV
V
C
= 24V
IN
IN(MLCC)
V
C
= 24V
IN
IN(MLCC)
V
C
= 24V
IN
IN(MLCC)
= 2 × 10µF X7R
= 2 × 10µF X7R
Output Short-Circuit,
10A Initial Load
Start-Up with VINH Shorted to SW
Node, 1VOUT(NOꢁ)
Start-Up with VINH Shorted to SW
Node, 3.3VOUT(NOꢁ)
V
IN
20V/DIV
V
V
IN
V
INH
OUT
10V/DIV
2V/DIV
1V/DIV
V
INH
5V/DIV
V
OUT
200mV/DIV
V
I
IN
OUT
1V/DIV
1A/DIV
CROWBAR
5V/DIV
CROWBAR
5V/DIV
4641 G13
4641 G14
4641 G15
20µs/DIV
400µs/DIV
800µs/DIV
V
C
= 24V
IN
IN(MLCC)
FRONT PAGE CIRCUIT WITH V
SHORT
FIGURE 46 CIRCUIT WITH V
SHORT
INH
INH
= 2 × 10µF X7R
CIRCUITED TO SW PRIOR TO POWER-UP.
CIRCUITED TO SW PRIOR TO POWER-UP.
APPLYING UP TO 38V . NO LOAD
APPLYING UP TO 38V . NO LOAD
IN
IN
Paralleled ꢁodules, Current-
Sharing Perforꢃance. cf.
Figure 66 Circuit. 28VIN
Autonoꢃous Restart with VINH
Shorted to SW Node, 3.3VOUT(NOꢁ)
Control IC Bandgap and 1VREF
Voltages vs Teꢃperature. 28VIN
V
IN
12
10
0.606
0.604
1.006
1.004
10V/DIV
V
INH
10V/DIV
8
6
0.602
1.002
U1 I
V
FB
V
OUT
OUT
1V/DIV
0.600
0.598
1.000
0.998
U2 I
OUT
V
1VREF(DC)
CROWBAR
5V/DIV
4
4641 G16
100ms/DIV
2
FIGURE 46 CIRCUIT, SHORT CIRCUITING V
INH
TO SW IN SITU, OPERATING AT 38V AND
IN
0.596
0.594
0.996
0.994
0
NO LOAD. LATCH CONNECTED TO INTV AND
CC
C
TMR
= 47nF
–2
4
8
12
20
0
16
–75 –50 –25
0
25 50 75 100 125 150
JUNCTION TEMPERATURE (°C)
TOTAL OUTPUT CURRENT (A)
4641 G17
4641 G18
4641f
9
Linear [ Linear ]
