LTC3716 Datasheet, PDF (7/28 Pages) Linear Technology – 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3716
Load Step (Figure 13)
V_IN = 15V, V_OUT = 1.25V, SLEW RATE = 30A/µs
V_CC
50mV/DIV
I_CC
4A/DIV
FCB = 0V
25µs/DIV
3716 G19
Burst Mode Operation (Figure 13)
V_IN = 15V, V_OUT = 1.6V, I_L = 200mA_RMS
V_OUT(AC)
20mV/DIV
I_L1
1A/DIV
Constant Frequency Mode
(Figure 13)
V_IN = 15V, V_OUT = 1.6V, I_L = 400mA_RMS
V_OUT(AC)
20mV/DIV
I_L1
1A/DIV
I_L2
1A/DIV
FCB = OPEN
R9, R21 = 0.01Ω
10µs/DIV
3716 G25
I_L2
1A/DIV
FCB = INTV_CC
R9, R21 = 0.01Ω
2µs/DIV
3716 G26
Current Sense Pin Input Current
vs Temperature
–12
V_OUT = 1.6V
–11
–10
–9
–8
EXTV_CC Switch Resistance
vs Temperature
10
8
6
4
2
Oscillator Frequency
vs Temperature
350
V_FREQSET = 5V
300
250
V_FREQSET = OPEN
200
150
V_FREQSET = 0V
100
50
–7
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3716 G20
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3716 G21
0
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
3716 G22
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
3716 G23
V_RUN/SS 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
3716 G24
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