LTC3709 Datasheet, PDF (6/24 Pages) Linear Technology – Fast 2-Phase, No RSENSE Synchronous DC/DC Controller with Tracking/Sequencing

LTC3709
TYPICAL PERFOR A CE CHARACTERISTICS
Shutdown Current at V_CC = 5V
45
40
35
30
25
20
15
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G10
V_FB Pin Input Current
–20
–25
–30
–35
–40
–45
–50
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G13
UVLO Threshold
4.5
4.3
4.1
3.9
3.7
3.5
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G16
Error Amplifier g_m
1.6
EA Load Regulation
0.4
1.5
0.3
1.4
0.2
1.3
0.1
1.2
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G11
RUN/SS Threshold
1.8
1.6
1.4
1.2
1.0
0.8
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G14
On-Time vs I_ON Current
10000
1000
100
10
10
100
I_ON CURRENT (µA)
1000
3709 G17
0
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G12
Armed Threshold
4.0
3.5
3.0
2.5
2.0
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G15
Current Sense Threshold
vs I_TH Voltage
300
V_RNG = 2V
250
V_RNG = V_CC
200
V_RNG = 1V
150
V_RNG = 0V
100
50
V_RNG = 0.5V
0
–50
–100
–150
0
0.6
1.2
1.8
I_TH VOLTAGE (V)
2.4
3709 G18
3709f
6