LTC3412A Linear Technology, LTC3412A Datasheet - Page 5

• Manufacturer Part Number: LTC3412A
• Description: 3A/ 4MHz/ Monolithic Synchronous Step-Down Regulator
• Manufacturer: Linear Technology

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