LTC3611_15 Datasheet, PDF (5/26 Pages) Linear Technology – 10A, 32V Monolithic Synchronous Step-Down DC/DC Converter

Typical Performance Characteristics
LTC3611
Efficiency vs Load Current
100
DISCONTINUOUS
90
80
70
60
50
0.01
CONTINUOUS
V_IN = 12V
V_OUT = 2.5V
EXTV_CC = 5V
FIGURE 6 CIRCUIT
0.1
1
LOAD CURRENT (A)
10
3611 G04
Frequency vs Load Current
650
600
550
CONTINUOUS MODE
500
450
400
DISCONTINUOUS MODE
350
300
250
200
150
100
50
0
0
2
4
6
8
LOAD CURRENT (A)
10
3611 G07
Efficiency vs Input Voltage
100
FCB = 5V
FIGURE 6 CIRCUIT
95
90
I_LOAD = 10A
85
I_LOAD = 1A
80
5
10 15 20 25 30 35
INPUT VOLTAGE (V)
3611 G05
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)
3611 G08
Load Current vs I_TH Voltage
and V_RNG
25
20
V_RNG = 1V
15
0.7V
10
0.5V
5
0
–5
–10
0 0.5 1 1.5 2 2.5 3
I_TH VOLTAGE (V)
3611 G10
On-Time vs I_ON Current
10000
V_VON = 0V
1000
100
10
1
10
I_ON CURRENT (µA)
100
3611 G11
Frequency vs Input Voltage
640
I_LOAD = 10A
600
560
520
480
I_LOAD = 0A
440
FCB = 0V
FIGURE 6 CIRCUIT
400
5 10 15 20 25
INPUT VOLTAGE (V)
30 35
3611 G06
I_TH Voltage vs Load Current
2.5
FIGURE 6 CIRCUIT
2.0
1.5 _CONTINUOUS
MODE
1.0
DISCONTINUOUS
MODE
0.5
0
0
5
10
15
LOAD CURRENT (A)
3611 G09
On-Time vs V_ON Voltage
1000
I_ON = 30µA
800
600
400
200
0
0
1
2
V_ON VOLTAGE (V)
3
3611 G12
3611fd