LTC3442
U W
TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25°C unless otherwise specified).
Burst Mode Quiescent Current
vs VIN
Quiescent Current vs VIN
(Fixed Frequency Mode)
Peak Current Clamp vs VIN
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
50
45
40
35
30
25
20
15
10
5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.0 MHz
1.5 MHz
1.0 MHz
0.5 MHz
NO SWITCHING
0
4.5
5.5
2.5
3.0
3.5
4.0
(V)
5.0
2.5
3.0
4.0
(V)
4.5
5.0
5.5
3.0
3.5
4.5
3.5
2.5
5.0
5.5
4.0
(V)
V
V
IN
V
IN
IN
3442 G09
3442 G08
3442 G07
Average Input Current Limit
vs Temperature (Normalized)
Automatic Burst Mode Threshold
vs RBURST
Minimum Start Voltage
vs Temperature
160
150
140
130
120
110
100
90
5%
4%
2.30
2.29
2.28
2.27
2.26
2.25
2.24
2.23
2.22
2.21
2.20
V
= V
= 3.3V
OUT
IN
LEAVE Burst Mode
OPERATION
3%
2%
1%
0%
–1%
–2%
–3%
–4%
–5%
80
ENTER Burst Mode
OPERATION
70
60
–55
–25
35
65
95
125
5
150
175
200
225
250
–55 –35 –15
5
25 45 65 85 105 125
TEMPERATURE (°C)
R
BURST
(kΩ)
TEMPERATURE (°C)
3442 G11
3442 G10
3442 G12
Feedback Voltage vs Temperature
(Normalized)
Frequency Change vs Temperature
(Normalized)
Switch Pins Before Entering
Boost Mode
1.0%
0.8%
2.0%
1.5%
V
= V
= 3.3V
OUT
IN
SW1
2V/DIV
0.6%
1.0%
0.4%
0.5%
SW2
2V/DIV
0.2%
0.0%
0.0%
–2.0%
–0.4%
–0.6%
–0.8%
–1.0%
–0.5%
–1.0%
–1.5%
–2.0%
3442 G15
50ns/DIV
V
V
= 2.9V
IN
OUT
= 3.3V AT 500mA
–55 –35 –15
5
25 45 65 85 105 125
–55 –35 –15
5
25 45 65 85 105 125
TEMPERATURE (°C)
TEMPERATURE (°C)
3442 G13
3442 G14
3442f
4
Linear Systems [ Linear Systems ]
