LTC3412A Datasheet, PDF (5/20 Pages) Linear Technology – 3A, 4MHz, Monolithic Synchronous Step-Down Regulator

LTC3412A
TYPICAL PERFOR A CE CHARACTERISTICS
Load Step Transient Forced
Continuous
V_OUT
100mV/DIV
INDUCTOR
CURRENT
2A/DIV
Start-Up Transient
V_OUT
2V/DIV
RUN/SS
2V/DIV
INDUCTOR
CURRENT
2A/DIV
V_IN = 3.3V
V_OUT =2.5V
F = 1MHz
40μs/DIV
LOAD STEP = 0A TO 3A
FIGURE 4 CIRCUIT
3412A G10
V_IN = 3.3V
1ms/DIV
V_OUT =2.5V
LOAD STEP = 2A
FIGURE 4 CIRCUIT
3412A G11
V_REF vs Temperature
0.7975
V_IN = 3.3V
0.7970
0.7965
0.7960
0.7955
0.7950
0.7945
0.7940
0.7935
0.7930
–45 –25 –5 15 35 55 75 95 115
TEMPERATURE (°C)
3412A G12
Switch On-Resistance vs
Input Voltage
100
95
90
85
PFET
80
75
70
NFET
65
60
55
50
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE (V)
3412A G13
Frequency vs R_OSC
5000
4500
V_IN = 3.3V
4000
3500
3000
2500
2000
1500
1000
500
0
40 140 240 340 440 540 640 740 840 940
R_OSC (kΩ)
3412A G16
Switch On-Resistance vs
Temperature
120
V_IN = 3.3V
100
80
PFET
60
NFET
40
20
0
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3412A G14
Frequency vs Input Voltage
1060
R_OSC = 294k
1050
1040
1030
1020
1010
1000
990
2.5
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3412A G17
Switch Leakage Current vs
Input Voltage
50
45
40
35
30
25
PFET
20
15
10
5
NFET
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3412A G15
Frequency vs Temperature
1020
V_IN = 3.3V
1015 R_OSC = 294k
1010
1005
1000
995
990
985
980
975
970
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3412A G18
3412afc
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