LTC3605_15 Datasheet, PDF (5/22 Pages) Linear Technology – 15V, 5A Synchronous Step-Down Regulator

LTC3605
Typical Performance Characteristics T_A = 25°C unless otherwise specified.
Switch Leakage vs V_IN
350
300
250
BOTTOM SWITCH
200
150
100
50
TOP SWITCH
0
0
4
8
12
16
20
V_IN (V)
3605 G10
Efficiency vs V_IN
98 _{VOUT = 3.3V}
96
I_LOAD = 1A
94
92
90
88
I_LOAD = 5A
86
84
0
3
6
9
12
15
V_IN (V)
3605 G11
Frequency vs V_ON Voltage
1.6
V_IN = 14V
1.4 ^{RT = 162k}
1.2
1.0
0.8
0.6
0.4
0.2
0
0 2 4 6 8 10 12 14
V_ON (V)
3605 G12
Current Limit Foldback
120
100
80
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
V_FB (V)
3605 G13
INTV_CC Load Regulation
101
100
T_A = 25°C
99
98
97
96
95
94
93
92
91
90
0 20 40 60 80 100 120 140
INTV_CC OUTPUT CURRENT (mA)
3605 G14
RUN Pin Threshold vs Temperature
1.30
1.25
1.20
1.15
1.10
1.05
1.00
–40 –15
10 35 60 85
TEMPERATURE (°C)
110
3605 G15
DCM Operation
CLKOUT
2V/DIV
V_SW
5V/DIV
I_L
2A/DIV
V_IN = 12V
V_OUT = 1.2V
MODE = 0
I_OUT = 0
L1 = 0.33µH
400ns/DIV
3605 G16
CCM Operation
CLKOUT
2V/DIV
V_SW
5V/DIV
I_L
2A/DIV
V_IN = 12V
V_OUT = 1.2V
MODE = 3.3V
PHMODE = 3.3V
I_OUT = 0
L1 = 0.33µH
400ns/DIV
3605 G17
For more information www.linear.com/LTC3605
3605fd
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