Datasheet

LTC3417
5
3417fd
TYPICAL PERFORMANCE CHARACTERISTICS
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
R
DS(ON)
vs V
IN
OUT2 Frequency vs V
IN
Frequency vs Temperature
V
IN
(V)
2 2.5
EFFICIENCY (%)
90
95
100
3417 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
3417 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
3417 G12
100µs/DIV
FREQUENCY (MHz)
0
82
EFFICIENCY (%)
84
86
88
90
92
94
1234
3417 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
3417 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
3417 G15
0.085
0.100
0.095
3.5
5
5.5
T
A =
27°C
P-CHANNEL SWITCH
N-CHANNEL SWITCH
V
IN
(V)
2
R
DS(ON)
(Ω)
0.18
0.19
0.20
3.5 4.5
3417 G16
0.17
0.16
2.5 3
4 5 5.5
0.15
0.14
T
A
= 27°C
P-CHANNEL SWITCH
N-CHANNEL SWITCH
V
IN
(V)
2
FREQUENCY VARIATION (%)
0
2
4
5 5.5
3417 G17
–4
–10
2.5 3
3.5
4 4.5
6
–2
–6
–8
FREQ = 143k TO GROUND
FREQ = V
IN
TEMPERATURE (°C)
–50
FREQUENCY VARIATION (%)
5
10
15
25 75
3417 G18
0
–5
–25 0
50 100 125
–10
–15
FREQ = 143k TO GROUND
FREQ = V
IN