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LTC3442 Datasheet(PDF) 5 Page - Linear Technology

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

LTC3442 Datasheet(HTML) 5 Page - Linear Technology

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LTC3442
5
3442fa
200
µs/DIV
3442 G22
COUT = 100µF
LOW ESR TANTALUM
INDUCTOR
CURRENT
0.5A/DIV
VOUT
50mV/DIV
1ms/DIV
3442 G23
RLIM = 133k
CLIM = .001µF
INDUCTOR
CURRENT
0.5A/DIV
RLIM PIN
0.5V/DIV
VOUT
2V/DIV
20
µs/DIV
3442 G21
COUT = 100µF
LOW ESR TANTALUM
INDUCTOR
CURRENT
0.5A/DIV
VOUT
50mV/DIV
50ns/DIV
3442 G17
SW1
2V/DIV
SW2
2V/DIV
VIN = 4.2V
VOUT = 3.3V AT 500mA
50ns/DIV
3442 G16
SW1
2V/DIV
SW2
2V/DIV
VIN = 3.3V
VOUT = 3.3V AT 500mA
TYPICAL PERFOR A CE CHARACTERISTICS
Switch Pins in Buck-Boost Mode
Switch Pins Entering
Buck-Boost Mode
Output Ripple at 1A Load
Load Transient Response in Fixed
Frequency Mode, No Load to 1A
Load Transient Response in Auto
Burst Mode Operation, No Load to 1A
Burst Mode Operation
Pulsed Overload Using Average
Input Current Limit
Transition from Burst Mode
Operation to Fixed Frequency Mode
1
µs/DIV
3442 G18
VOUT
20mV/DIV
AC COUPLED
VIN = 4.2V
VIN = 3.3V
VIN = 2.7V
100
µs/DIV
3442 G19
VIN = 3.6V
VOUT = 3.3V
COUT = 47µF, X5R CERAMIC
LOAD
0.5A/DIV
VOUT
100mV/DIV
100
µs/DIV
3442 G20
VIN = 3.6V
VOUT = 3.3V
COUT = 47µF, X5R CERAMIC + 100µF
LOW ESR TANTALUM
LOAD
0.5A/DIV
VOUT
100mV/DIV
(TA = 25°C unless otherwise specified).



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