LTC3630_15 Datasheet, PDF (5/26 Pages) Linear Technology – High Efficiency, 65V 500mA Synchronous Step-Down Converter

Typical Performance Characteristics
LTC3630
Efficiency vs Input Voltage
95
V_OUT = 5V
90
FIGURE 13 CIRCUIT
85
80
75
70
65
60
55
10
I_LOAD = 500mA
I_LOAD = 100mA
I_LOAD = 10mA
I_LOAD = 1mA
20 30 40 50
INPUT VOLTAGE (V)
60
3630 G07
Feedback Comparator Trip
Voltage vs Temperature
0.804
V_IN = 12V
0.802
0.800
0.798
0.796
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3630 G10
Peak Current Trip Threshold
vs R_ISET
1400
V_IN = 12V
1200
1000
800
600
400
200
0
0
50
100 150 200 250
R_ISET (kΩ)
3630 G13
Line Regulation vs Input Voltage
0.05
FIGURE 13 CIRCUIT
0.04 I_LOAD = 500mA
0.03
0.02
0.01
0
–0.01
–0.02
–0.03
–0.04
–0.05
5 15 25 35 45 55 65
INPUT VOLTAGE (V)
3630 G08
Feedback Comparator Hysteresis
vs Temperature
5.5
V_IN = 12V
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
–55 –25
5 35 65 95 125 155
TEMPERATURE (°C)
3630 G11
Peak Current Trip Threshold
vs Input Voltage
1400
I_SET = OPEN
1200
1000
800
I_SET = 100k
600
400
200
I_SET = 0V
0
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
3630 G14
Load Regulation vs Load Current
5.04
V_IN = 12V
5.03 ^VOUT ^{= 5V}
FIGURE 13 CIRCUIT
5.02
5.01
5.00
4.99
4.98
4.97
4.96
0
100 200 300 400 500
LOAD CURRENT (mA)
3630 G09
Peak Current Trip Threshold
vs Temperature and I_SET
1400
V_IN = 12V
1200
I_SET OPEN
1000
800
R_ISET = 100kΩ
600
400
200
I_SET = GND
0
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3630 G12
Quiescent V_IN Supply Current
vs Input Voltage
16
14
SLEEP
12
10
8
SHUTDOWN
6
4
2
0
5 15 25 35 45 55 65
V_IN VOLTAGE (V)
3630 G15
For more information www.linear.com/LTC3630
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