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LTC3440 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3440
Description  Micropower Synchronous Buck-Boost DC/DC Converter
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3440 Datasheet(HTML) 4 Page - Linear Technology

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LTC3532
4
3532fc
TEMPERATURE (°C)
VIN = 3.6V
–55
1000
1050
1100
95
3532 G07
950
900
800
–5
45
850
1200
1150
TEMPERATURE (°C)
–55
1.196
1.201
1.211
1.216
1.221
45
1.241
3532 G08
1.206
–5
95
1.226
1.231
1.236
VOUT
200mV/DIV
ILOAD
100mA/DIV
100μs/DIV
COUT = 10μF
VIN = 3.6V
VOUT = 3.3V
3535 G09
Efficiency vs Frequency
Peak Current Clamp and Limit
vs VIN
Automatic Burst Threshold
vs RBURST
Burst Mode to Fixed Frequency
Transition
Switch Pins in Buck-Boost Mode
Switch Pins Before Entering
Boost Mode
TYPICAL PERFOR A CE CHARACTERISTICS
Frequency vs Temperature
Feedback Voltage vs Temperature
Load Transient Response in
Fixed Frequency Mode
TA = 25°C, unless otherwise specified.
FREQUENCY (kHz)
500
80
84
86
88
90
92
94
1000
1500
3532 G04
96
98
100
82
2000
VIN = 3.6V
VOUT = 3.3V
VIN (V)
2.4
0.8
1.0
1.2
5.4
3532 G05
0.6
0.4
0
3.4
4.4
0.2
1.6
1.4
VOUT = 3.3V
ICLAMP
ILIMIT
BURST RESISTOR (kΩ)
150
10
20
30
40
50
60
70
250
350
450
550
3532 G06
LEAVE BURST
ENTER BURST
VOUT = 3.3V
VIN = 3.6V
SW1
2V/DIV
SW2
2V/DIV
40ns/DIV
VIN = 3.3V
VOUT = 3.3V
ILOAD = 100mA
3532 G11
SW1
2V/DIV
SW2
2V/DIV
40ns/DIV
VIN = 2.9V
VOUT = 3.3V
ILOAD = 100mA
3532 G12
VOUT
200mV/DIV
BURST PIN
2V/DIV
400μs/DIV
COUT = 22μF
VIN = 3.6V
VOUT = 3.3V
3532 G10


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