LTC3631 Datasheet, PDF (4/22 Pages) Linear Technology – High Effi ciency, High Voltage 100mA Synchronous Step-Down Converter

LTC3631
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current,
V_OUT = 5V
95 _{VOUT = 5V}
FIGURE 10 CIRCUIT
90
V_IN = 12V
85
V_IN = 36V
80
V_IN = 24V
75
70
65
60
0.1
1
10
LOAD CURRENT (mA)
100
3631 G01
Efficiency vs Input Voltage
95
V_OUT = 5V
FIGURE 10 CIRCUIT
90
I_LOAD = 100mA
85
I_LOAD = 10mA
80
I_LOAD = 1mA
75
70
65
10 15
20 25 30 35
INPUT VOLTAGE (V)
40 45
3631 G04
Feedback Comparator Trip
Voltage vs Temperature
0.801
V_IN = 10V
0.800
0.799
0.798
–40
–10 20 50 80 110
TEMPERATURE (°C)
LTC1144 • TPC06
Efficiency vs Load Current,
V_OUT = 3.3V
95 _{VOUT = 3.3V}
FIGURE 10 CIRCUIT
90
V_IN = 12V
85
80
V_IN = 36V
75
V_IN = 24V
70
65
60
0.1
1
10
LOAD CURRENT (mA)
100
3631 G02
Line Regulation
0.20
I_LOAD = 100mA
FIGURE 10 CIRCUIT
0.10
0
–0.10
–0.20
5
10 15 20 25 30 35 40 45
INPUT VOLTAGE (V)
3631 G05
Feedback Comparator Hysteresis
vs Temperature
5.6
V_IN = 10V
5.4
5.2
5.0
4.8
4.6
4.4
–40
–10 20 50 80
TEMPERATURE (°C)
110
3631 G08
Efficiency vs Load Current,
V_OUT = 2.5V
90
V_OUT = 2.5V
85 ^{FIGURE 10 CIRCUIT}
V_IN = 12V
80
75
V_IN = 36V
V_IN = 24V
70
65
60
55
50
0.1
1
10
LOAD CURRENT (mA)
100
3631 G03
Load Regulation
5.05
V_IN = 10
5.04 VOUT = 5V
FIGURE 10 CIRCUIT
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
3631 G06
Peak Current Trip Threshold
vs Temperature and I_SET
250 _{VIN = 10V}
225
200
I_SET = OPEN
175
150
125
R_SET = 500k
100
75
I_SET = GND
50
25
0
–40 –10 20 50 80 110
TEMPERATURE (°C)
3631 G09
3631fb
4