LTC3626_15 Datasheet, PDF (5/28 Pages) Linear Technology – 20V, 2.5A Synchronous Monolithic Step-Down Regulator with Current and Temperature Monitoring

LTC3626
Typical Performance Characteristics
T_A = 25°C, PV_IN = SV_IN = 12V, f = 1MHz unless otherwise noted.
Efficiency vs Load Current
(Burst Mode Operation)
100
V_OUT = 1.8V
90
80
70
60
50
40
30
20
V_IN = 4V
V_IN = 8V
10
V_IN = 12V
V_IN = 20V
0
1
10
100
1000 10000
LOAD CURRENT (mA)
3626 G01
Efficiency vs Load Current (Forced
Continuous Mode Operation)
100
V_OUT = 1.8V
90
80
70
60
50
40
30
20
V_IN = 4V
V_IN = 8V
10
V_IN = 12V
V_IN = 20V
0
1
10
100
1000 10000
LOAD CURRENT (mA)
3626 G02
Efficiency vs Load Current
(Burst and Forced Continuous)
100
Burst Mode OPERATION
90
80
70
60
FORCED
CONTINUOUS
50
MODE OPERATION
40
30
20
10
V_OUT = 5V
V_OUT = 3.3V
0
1
10
100
1000 10000
LOAD CURRENT (mA)
3626 G02
Efficiency vs Input Voltage
(Burst Mode Operation)
100
V_OUT = 1.8V
95
90
85
80
75
70
I_LOAD = 1A
I_LOAD = 2.5A
65
I_LOAD = 100mA
I_LOAD = 10mA
60
4 6 8 10 12 14 16 18 20 22
INPUT VOLTAGE (V)
3626 G04
Efficiency vs Frequency (Forced
Continuous Mode Operation)
100
V_OUT = 3.3V
90
80
70
60
50
40
30
f = 500kHz
20
f = 1MHz
10
f = 2MHz
f = 3MHz
0
1
10
100
1000 10000
LOAD CURRENT (mA)
3626 G05
Reference Voltage
vs Temperature
0.606
0.604
0.602
0.600
0.598
0.596
0.594
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3626 G06
Internal MOSFET R_DS(ON)
vs Temperature
160
140
TOP SWITCH
120
100
80
BOTTOM SWITCH
60
40
20
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3626 G07
Temperature Monitor
vs Temperature
125
2.0
100
1.9
75
1.7
50
1.6
25
1.5
0
1.4
–25
1.2
–50
–50 –25
0 25 50 75
TEMPERATURE (°C)
1.1
100 125
3626 G08
For more information www.linear.com/LTC3626
3626fa
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