LTC3417 Linear Technology, LTC3417 Datasheet - Page 5

• Manufacturer Part Number: LTC3417
• Description: Dual Synchronous 1.4A/800mA 4MHz Step-Down DC/DC Regulator
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
0.20
0.19
0.14
0.18
0.17
0.16
0.15
100
94
92
90
88
86
84
82
95
80
70
90
85
75
2
Efficiency vs Frequency OUT1
R
OUT2 Efficiency vs V
(Pulse Skipping Mode)
2
0
DS(ON)
N-CHANNEL SWITCH
2.5
2.5
P-CHANNEL SWITCH
1
I
LOAD
vs V
3
I
3
LOAD
FREQUENCY (MHz)
= 800mA
IN
2
3.5
3.5
= 250mA
OUT2
V
V
IN
IN
(V)
(V)
4
V
REFER TO FIGURE 4
4
3
OUT
IN
4.5
= 2.5V
T
V
V
I
4.5
OUT
W
A
IN
OUT
= 27°C
= 3.6V
T
4
= 300mA
A
= 1.8V
= 27°C
5
5
3417 G16
3417 G13
3417 G10
U
5.5
5.5
5
100mV/DIV
500mA/DIV
V
I
OUT1
OUT1
–10
90
85
80
75
70
65
60
–2
–4
–6
–8
2
0
6
4
2
Efficiency vs Frequency OUT2
Frequency vs V
0
Load Step OUT1
V
V
I
REFER TO FIGURE 4
LOAD
IN
OUT
FREQ = 143k TO GROUND
= 3.6V
2.5
= 1.8V
= 0.25A to 1.4A
FREQ = V
1
3
FREQUENCY (MHz)
100µs/DIV
3.5
V
IN
IN
IN
2
(V)
4
T
V
V
I
4.5
OUT
A
IN
OUT
3
= 27°C
= 3.6V
= 100mA
= 2.5V
5
3417 G11
3417 G17
3417 G14
5.5
4
100mV/DIV
500mA/DIV
V
0.095
0.105
0.100
0.090
0.085
0.080
I
OUT2
OUT2
–15
–10
15
10
–5
5
0
–50
R
2
Frequency vs Temperature
Load Step OUT2
V
V
I
REFER TO FIGURE 4
LOAD
IN
OUT
DS(ON)
N-CHANNEL SWITCH
= 3.6V
–25
2.5
= 2.5V
= 0.25A to 0.8A
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P-CHANNEL SWITCH
vs V
3
0
TEMPERATURE (˚C)
IN
3.5
100µs/DIV
25
OUT1
V
FREQ = V
FREQ = 143k TO GROUND
LTC3417
IN
(V)
50
4
IN
4.5
75
T
A =
100
5
3417fb
5
27°C
3417 G15
3417 G18
3417 G12
5.5
125