Datasheet

LTC3417A-2
5
3417a2fa
OUT2 Effi ciency vs V
IN
(Pulse Skipping Mode) Load Step OUT1 Load Step OUT2
Effi ciency vs Frequency OUT1 Effi ciency vs Frequency OUT2 R
DS(ON)
vs V
IN
OUT1
TYPICAL PERFORMANCE CHARACTERISTICS
OUT1 Effi ciency vs Load Current OUT2 Effi ciency vs Load Current
OUT1 Effi ciency vs V
IN
(Burst Mode Operation)
LOAD CURRENT (A)
70
EFFICIENCY (%)
80
85
95
100
0.001 0.1 1 10
3417A-2 G07
60
0.01
90
75
65
V
IN
= 2.5V
V
OUT
= 1.8V
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
REFER TO FIGURE 4
0.001 0.1 10.01
LOAD CURRENT (A)
80
EFFICIENCY (%)
90
100
3417A-2 G08
70
75
85
95
65
60
V
IN
= 3.6V
V
OUT
= 2.5V
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
REFER TO FIGURE 4
V
IN
(V)
2 2.5 3.5 4.5 5.5
EFFICIENCY (%)
90
95
100
3417A-2 G09
85
80
3
45
75
70
V
OUT
= 1.8V
I
LOAD
= 1.4A
I
LOAD
= 460mA
REFER TO FIGURE 4
V
IN
(V)
2 2.5
EFFICIENCY (%)
90
95
100
3417A-2 G10
85
80
3 3.5
4 4.5 5 5.5
75
70
V
OUT
= 2.5V
REFER TO FIGURE 4
I
LOAD
= 800mA
I
LOAD
= 250mA
V
IN
= 3.6V
V
OUT
= 1.8V
I
LOAD
= 0.25A to 1.4A
REFER TO FIGURE 4
I
OUT1
500mA/DIV
V
OUT1
100mV/DIV
3417A-2 G11
100µs/DIV
V
IN
= 3.6V
V
OUT
= 2.5V
I
LOAD
= 0.25A to 0.8A
REFER TO FIGURE 4
I
OUT2
500mA/DIV
V
OUT2
100mV/DIV
3417A-2 G12
100µs/DIV
FREQUENCY (MHz)
0
82
EFFICIENCY (%)
84
86
88
90
92
94
1234
3417A-2 G13
5
T
A
= 27°C
V
IN
= 3.6V
V
OUT
= 1.8V
I
OUT
= 300mA
FREQUENCY (MHz)
0
60
EFFICIENCY (%)
65
70
75
80
85
90
12 34
3417A-2 G14
T
A
= 27°C
V
IN
= 3.6V
V
OUT
= 2.5V
I
OUT
= 100mA
V
IN
(V)
2 2.5
0.080
R
DS(ON)
(Ω)
0.090
0.105
3
4
4.5
3417A-2 G15
0.085
0.100
0.095
3.5
5
5.5
T
A =
27°C
P-CHANNEL SWITCH
N-CHANNEL SWITCH