LTC3703-5_15 Datasheet, PDF (4/32 Pages) Linear Technology – 60V Synchronous Switching Regulator Controller

LTC3703-5
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C (unless otherwise noted).
Efficiency vs Input Voltage
100
95
I_OUT = 1A
I_OUT = 5A
90
85
V_OUT = 5V
f = 250kHz
FORCED CONTINUOUS
80
0 10 20 30 40
INPUT VOLTAGE (V)
50 60
37035 G01
V_CC Current vs V_CC Voltage
3.5
V_CC RISING
3.0
COMP = 1.5V
2.5
2.0
V_FB = 0V
1.5
1.0
0.5
0
0 2.5 5 7.5 10 12.5 15
V_CC VOLTAGE (V)
37035 G04
V_CC Shutdown Current
vs Temperature
35
V_CC = 5V
30
25
20
15
10
5
0
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
37035 G07
Efficiency vs Load Current
100
V_IN = 24V
95
V_IN = 42V
Load Transient Response
V_OUT
50mV/DIV
AC COUPLED
90
I_OUT
2A/DIV
85
V_OUT = 12V
f = 250kHz
PULSE SKIP ENABLED
80
0
1
2
3
LOAD CURRENT (A)
4
5
37035 G02
V_CC Current vs Temperature
4
3
COMP = 1.5V
2
V_FB = 0V
1
0
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
37035 G05
Reference Voltage
vs Temperature
0.803
0.802
0.801
0.800
0.799
0.798
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
37035 G08
V_IN = 50V
50µs/DIV
V_OUT = 12V
1A TO 5A LOAD STEP
37035 G03
V_CC Shutdown Current vs V_CC
Voltage
120
100
80
60
40
20
0
0 2 4 6 8 10 12 14 16
V_CC VOLTAGE (V)
37035 G06
Normalized Frequency
vs Temperature
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
37035 G09
37035fa
4