Datasheet

LTC3415
4
3415fa
40μs/DIV
3415 G08
V
IN
= 3.3V
V
OUT
= 1.8V
FORCED CONTINUOUS
I
LOAD
= 0.1A TO 5A
I
OUT
5A/DIV
I
L
5A/
DIV
V
OUT
(AC)
100mV/
DIV
TEMPERATURE (°C)
–100
R
DSON
(mΩ)
40
35
30
25
20
15
100
3415 G05
–50 0 50 150
POWER PMOS
POWER NMOS
TEMPERATURE (°C)
–100
OSCILLATOR FREQUENCY (MHz)
100
3415 G11
–50 0 50 150
1.6
1.8
2.0
1.4
1.2
1.0
LOAD CURRENT (A)
0
–0.5
LOAD REGULATION (%)
–0.4
–0.2
–0.1
0
0.5
0.2
245
–0.3
0.3
0.4
0.1
1 3 678
3415 G06
FC MODE
V
IN
= 3.3V
V
OUT
= 1.8V
LOAD CURRENT (A)
0.01
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
POWER LOSS (mW)
10
1
0.1
0.01
0.1 1 10
3415 G02
2.5V
3.3V
5V
EFFICIENCY
POWER LOSS
V
OUT
= 1.8V
TYPICAL PERFORMANCE CHARACTERISTICS
R
DSON
vs Temperature
Load Regulation
(Reference Figure 13)
Load Step
(Reference Figure 13)
Oscillator Frequency
vs Temperature
Effi ciency and Power Loss vs Load
Current Force Continuous Mode
LOAD CURRENT (A)
0.001
EFFICIENCY (%)
0.1
100
90
80
70
60
50
40
30
20
10
0
3415 G01
0.01
110
10
1
0.1
0.01
0.001
V
OUT
= 1.8V
V
IN
= 3.3V
% (Burst)
% (PSKIP)
% (FC)
W (Burst)
W (PSKIP)
W (FC)
POWER LOSS (mW)
Effi ciency and Power Loss vs
Load Current (3 Operating Modes)
(Reference Figure 13)
Supply Current vs V
IN
INPUT VOLTAGE (V)
2.5
SUPPLY CURRENT (mA)
4.5
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3415 G03
3.53
5
4
5.5
V
O
= 1.2V PULSE SKIP
V
O
= 1.2V BURST MODE
R
DSON
vs V
IN
INPUT VOLTAGE (V)
2.25
ON-RESISTANCE (mΩ)
4.25
40
35
30
25
20
15
10
5
0
3415 G04
3.25
5.25
PFET
NFET