LTC3602_15 Datasheet, PDF (5/20 Pages) Linear Technology – 2.5A, 10V, Monolithic Synchronous Step-Down Regulator

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3602
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)
3602 G12
Efficiency vs Load Current,
Forced Continuous
100 _{FIGURE 6 CIRCUIT}
90
80
V_IN = 5V
70
60
50
40
V_IN = 9V
30
20
10
0
0.01
0.1
1
LOAD CURRENT (A)
10
3602 G15
Load Regulation
0.10
FIGURE 6 CIRCUIT
V_IN = 7V
0.00
–0.10
–0.20
0
0.5 1 1.5 2 2.5 3
LOAD CURRENT (A)
3602 G18
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 (%)
3602 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
INPUT VOLTAGE (V)
3602 G16
5V LDO Output Voltage
vs Temperature
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
–50 –25
0 25 50 75
TEMPERATURE (oC)
100 125
3602 G19
Efficiency vs Load Current,
Burst Mode Operation
100
FIGURE 6 CIRCUIT
95
V_IN = 5V
V_IN = 9V
90
85
80
75
70
0.01
0.1
1
LOAD CURRENT (A)
10
3602 G14
Efficiency vs Frequency
100
FIGURE 6 CIRCUIT
98 ^{VIN = 7V}
I_LOAD = 1A
96
94
2.2μH
92
1μH
90
88
4.7μH
86
84
0
500 1000 1500 2000 2500 3000
FREQUENCY (kHz)
3602 G17
TRACK/SS Current
vs Temperature
1.40
1.35
1.30
1.25
1.20
1.15
1.10
–50 –25
0 25 50 75
TEMPERATURE (oC)
100 125
3602 G20
3602fb
5