LTC3603_15 Datasheet, PDF (5/22 Pages) Linear Technology – 2.5A, 15V Monolithic Synchronous Step-Down Regulator

Typical Performance Characteristics
LTC3603
Frequency vs Temperature
1020 _{ROSC = 105kΩ}
1015
1010
1005
1000
995
990
985
980
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3603 G09
Minimum Peak Inductor Current
vs Burst Clamp Voltage
3.0
2.5
2.0
1.5
1.0
0.5
0
0.4 0.5 0.6 0.7 0.8 0.9 1.0
BURST CLAMP VOLTAGE (V)
3603 G12
Efficiency vs Load Current,
Forced Continuous
100
FIGURE 6 CIRCUIT
90
V_IN = 5V
80
V_IN = 15V
V_IN = 12V
70
V_IN = 7.2V
60
50
40
30
0.01
0.1
1
LOAD CURRENT (A)
10
3603 G15
Quiescent Current
vs Input Voltage
600
ACTIVE
500
400
300
200
100
SLEEP
0
4 5 6 7 8 9 10 11 12 13 14 15
INPUT VOLTAGE (V)
3603 G10
Maximum Peak Inductor Current
vs Duty Cycle
5
4
3
2
1
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
3603 G13
Efficiency vs Input Voltage
100
FIGURE 6 CIRCUIT
95
I_LOAD = 1A
90
I_LOAD = 2.5A
85
80
75
70
4 5 6 7 8 9 10 11 12 13 14 15 16
INPUT VOLTAGE (V)
3603 G16
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Quiescent Current
vs Temperature
600
500
ACTIVE
400
300
200
100
SLEEP
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3603 G11
Efficiency vs Load Current,
Operation
100
FIGURE 6 CIRCUIT
95 ^{VIN = 5V}
V_IN = 7.2V
90
V_IN = 15V
85
V_IN = 12V
80
75
70
0.001
0.01
0.1
1
LOAD CURRENT (A)
10
3603 G14
Efficiency vs Frequency
100
FIGURE 6 CIRCUIT
98 ^ILOAD ^{= 2A}
96
94
V_IN = 7.2V
92
90
V_IN = 12V
88
86
84
0
1000
2000
3000
FREQUENCY (kHz)
3603 G17
3603fc
5