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LTC3442 Datasheet(PDF) 4 Page - Linear Integrated Systems

Part # LTC3442
Description  Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation
PDF  20 Pages
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Manufacturer  LINEAR [Linear Integrated Systems]
Direct Link  http://www.linearsystems.com
Logo LINEAR - Linear Integrated Systems

LTC3442 Datasheet(HTML) 4 Page - Linear Integrated Systems

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LTC3442
4
3442f
TYPICAL PERFOR A CE CHARACTERISTICS (T
A = 25°C unless otherwise specified).
Quiescent Current vs VIN
(Fixed Frequency Mode)
Burst Mode Quiescent Current
vs VIN
Peak Current Clamp vs VIN
VIN (V)
2.5
4.0
5.0
3442 G07
3.0
3.5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5.5
2.0 MHz
1.5 MHz
1.0 MHz
0.5 MHz
NO SWITCHING
VIN (V)
2.5
3.0
3.5
4.0
4.5
3442 G08
5.0
50
45
40
35
30
25
20
15
10
5
0
5.5
VIN (V)
2.5
2.0
2.5
3.0
4.0
5.0
3442 G09
1.5
1.0
3.0
3.5
4.5
5.5
0.5
0.0
3.5
Automatic Burst Mode Threshold
vs RBURST
Minimum Start Voltage
vs Temperature
Average Input Current Limit
vs Temperature (Normalized)
Frequency Change vs Temperature
(Normalized)
Feedback Voltage vs Temperature
(Normalized)
Switch Pins Before Entering
Boost Mode
RBURST (kΩ)
150
60
70
90
100
110
160
130
175
225
3442 G10
80
140
150
120
200
250
ENTER Burst Mode
OPERATION
LEAVE Burst Mode
OPERATION
TEMPERATURE (°C)
–55
–25
5
35
65
3442 G11
95
2.30
2.29
2.28
2.27
2.26
2.25
2.24
2.23
2.22
2.21
2.20
125
TEMPERATURE (°C)
–55
5%
4%
3%
2%
1%
0%
–1%
–2%
–3%
–4%
–5%
–15
25
45
125
3442 G12
–35
5
65
85 105
VIN = VOUT = 3.3V
TEMPERATURE (°C)
–55
0.0%
0.5%
1.0%
105
3442 G13
–0.5%
–1.0%
–2.0%
–15
25
65
–35
125
545
85
–1.5%
2.0%
1.5%
TEMPERATURE (°C)
–55
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
–2.0%
–0.4%
–0.6%
–0.8%
–1.0%
–15
25
45
125
3442 G14
–35
5
65
85 105
VIN = VOUT = 3.3V
50ns/DIV
3442 G15
SW1
2V/DIV
SW2
2V/DIV
VIN = 2.9V
VOUT = 3.3V AT 500mA



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