LTC3707 Datasheet, PDF (7/32 Pages) Linear Technology – High Effi ciency, 2-Phase Synchronous Step-Down Switching Regulator

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3707
Input Source/Capacitor
Instantaneous Current (Figure 13)
Burst Mode Operation (Figure 13)
Constant Frequency (Burst Inhibit)
Operation (Figure 13)
I_IN
2A/DIV
V_IN
200mV/DIV
V_SW1
10V/DIV
V_OUT
20mV/DIV
V_OUT
20mV/DIV
V_SW2
10V/DIV
V_IN = 15V
1μs/DIV
V_OUT = 5V
I_OUT5 = I_OUT3.3 = 2A
3707 G22
I_OUT
0.5A/DIV
V_IN = 15V
V_OUT = 5V
V_FCB = OPEN
I_OUT = 20mA
10μs/DIV
3707 G23
I_OUT
0.5A/DIV
V_IN = 15V
V_OUT = 5V
V_FCB = 5V
I_OUT = 20mA
2μs/DIV
3707 G24
Current Sense Pin Input Current
vs Temperature
35
V_OUT = 5V
33
31
29
27
25
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3707 G26
EXTV_CC Switch Resistance
vs Temperature
10
8
6
4
2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3707 G27
Oscillator Frequency
vs Temperature
350
V_FREQSET = 5V
300
250
V_FREQSET = OPEN
200
150
V_FREQSET = 0V
100
50
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3707 G28
Undervoltage Lockout
vs Temperature
3.50
3.45
3.40
3.35
3.30
3.25
3.20
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3707 G29
Shutdown Latch Thresholds
vs Temperature
4.5
4.0
LATCH ARMING
3.5
3.0
LATCHOFF
THRESHOLD
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3707 G30
3707fb
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