LTC3608 Datasheet, PDF (5/24 Pages) Linear Technology – 18V, 8A Monolithic Synchronous Step-Down DC/DC Converter

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3608
Frequency vs Load Current
700
600
CONTINUOUS MODE
500
400
DISCONTINUOUS MODE
300
200
100
0
0
2
4
6
8
10
LOAD CURRENT (A)
3608 G07
Load Regulation
0.80
FIGURE 6 CIRCUIT
0.60
0.40
0.20
0
–0.20
–0.40
–0.60
–0.80
0
2
4
6
8
10
LOAD CURRENT (A)
3608 G08
I_TH Voltage vs Load Current
2.5
2.0
1.5
CONTINUOUS
MODE
1.0
DISCONTINUOUS
0.5
MODE
0
0
5
10
LOAD CURRENT (A)
3608 G09
Load Current
vs I_TH Voltage and V_RNG
25
V_RNG = _1V
20
0.7V
15
0.5V
10
5
0
–5
–10
0
0.5 1.0 1.5 2.0
I_TH VOLTAGE (V)
2.5 3.0
3608 G10
On-Time vs I_ON Current
10000
V_VON = 0V
1000
100
10
1
10
I_ON CURRENT (μA)
100
3608 G11
On-Time vs V_ON Voltage
1000
I_ON = 30μA
800
600
400
200
0
0
1
2
V_ON VOLTAGE (V)
3
3608 G12
On-Time vs Temperature
300
I_ION = 30μA
V_VON = 0V
250
200
150
100
50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3608 G13
Maximum Valley Current Limit
vs V_RNG Voltage
25
20
15
10
5
0.5 0.6 0.7 0.8 0.9 1.0
V_RNG VOLTAGE (V)
3608 G14
Maximum Valley Current Limit
vs RUN/SS Voltage
15
12
9
6
3
0
1.65 1.90 2.15 2.40 2.65 2.90 3.15 3.40
RUN/SS VOLTAGE (V)
3608 G15
3608fa
5