LTC3720 Datasheet, PDF (5/24 Pages) Linear Technology – Single Phase VRM8.5 Current Mode Step-Down Controller

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3720
Error Amplifier g_m vs Temperature
2.0
1.8
1.6
1.4
1.2
1.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3720 G10
EXTV_CC Switch Resistance
vs Temperature
10
Input and Shutdown Currents
vs Input Voltage
1200
60
EXTV_CC OPEN
1000
50
800
40
SHUTDOWN
600
30
400
20
200
10
EXTV_CC = 5V
0
05
0
10 15 20 25 30 35
INPUT VOLTAGE (V)
3720 G11
FCB Pin Current vs Temperature
0
INTV_CC Load Regulation
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
10
20
30
40
INTV_CC LOAD CURRENT (mA)
50
3720 G12
RUN/SS Pin Current
vs Temperature
3
8
–0.25
–0.50
6
–0.75
4
–1.00
2
–1.25
2
PULL-DOWN CURRENT
1
0
PULL-UP CURRENT
–1
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3720 G13
–1.50
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3720 G14
–2
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3720 G15
RUN/SS Latchoff Thresholds
vs Temperature
5.0
Undervoltage Lockout Threshold
vs Temperature
4.0
4.5
3.5
LATCHOFF ENABLE
4.0
3.0
3.5
LATCHOFF THRESHOLD
3.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3720 G16
2.5
2.0
–50 –25
0 25 50 75
TEMPERATURE (C)
100 125
3720 G17
3720f
5