Datasheet

LTM4611
6
4611fb
For more information www.linear.com/LTM4611
Typical perForMance characTerisTics
1V Transient Response, 5V
IN
3.3V Transient Response, 5V
IN
1V Transient Response, 3.3V
IN
Start-Up, No Load
Short-Circuit, 15A Short-Circuit, No Load
Start-Up, 15A Load
Start-Up, Pre-Bias
Pulse-Skipping Mode Efficiency
OUTPUT CURRENT (A)
0.1
30
EFFICIENCY (%)
40
55
70
80
1 10
4611 G07
95
35
45
50
60
65
75
85
90
3.3V
IN
TO 1.5V
OUT
5V
IN
TO 1V
OUT
I
LOAD
5A/DIV
20µs/DIV
V
IN
= 3.3V, V
OUT
= 1V, USING DIFF AMP
4 × 100µF CERAMIC OUTPUT CAPACITORS
C
FF
= 47pF, C
P
= NONE
7.5A LOAD STEP AT 7.5A/µs
4611 G08
V
OUT
50mV/DIV
AC-COUPLED
I
LOAD
5A/DIV
20µs/DIV
4611 G09
V
OUT
50mV/DIV
AC-COUPLED
V
IN
= 5V, V
OUT
= 1V, USING DIFF AMP
4 × 100µF CERAMIC OUTPUT CAPACITORS
C
FF
= 47pF, C
P
= NONE
7.5A LOAD STEP AT 7.5A/µs
I
LOAD
5A/DIV
20µs/DIV
4611 G10
V
OUT
50mV/DIV
AC-COUPLED
V
IN
= 5V, V
OUT
= 3.3V, USING DIFF AMP
2 × 100µF CERAMIC OUTPUT CAPACITORS
C
FF
= 10pF, C
P
= NONE
7.5A LOAD STEP AT 7.5A/µs
V
OUT
500mV/DIV
I
IN
1A/DIV
1ms/DIV
4611 G11
V
IN
1V/DIV
V
IN
= 3.3V, V
OUT
= 1.5V, NO LOAD
3 × 22µF CERAMIC INPUT CAPACITORS
C
SS
= 10nF
4 × 100µF CERAMIC OUTPUT CAPACITORS
C
FF
= 33pF, C
P
= 10pF
I
IN
5A/DIV
I
LOAD
5A/DIV
V
OUT
500mV/DIV
1ms/DIV
4611 G12
V
IN
1V/DIV
V
IN
= 3.3V, V
OUT
= 1.5V, 100mΩ LOAD
3 × 22µF CERAMIC INPUT CAPACITORS
C
SS
= 10nF
4 × 100µF CERAMIC OUTPUT CAPACITORS
C
FF
= 33pF, C
P
= 10pF
RUN
5V/DIV
I
IN
1A/DIV
I
LOAD
2mA/DIV
2ms/DIV
4611 G13
V
OUT
500mV/DIV
V
IN
= 3.3V, V
OUT
= 1.5V, 0.75V PRE-BIAS LOAD
3 × 22µF CERAMIC INPUT CAPACITORS
C
SS
= 10nF
4 × 100µF CERAMIC OUTPUT CAPACITORS
C
FF
= 33pF, C
P
= 10pF
I
IN
2A/DIV
20µs/DIV
4611 G14
V
OUT
500mV/DIV
V
IN
= 3.3V, V
OUT
= 1.5V
15A LOAD PRIOR TO SHORT
I
IN
1A/DIV
20µs/DIV
4611 G15
V
OUT
500mV/DIV
V
IN
= 3.3V, V
OUT
= 1.5V
NO LOAD PRIOR TO SHORT