Datasheet

LTC3442
5
3442fb
For more information www.linear.com/LTC3442
TYPICAL PERFORMANCE 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
Frequency Change
vs Temperature (Normalized)
Feedback Voltage
vs Temperature (Normalized)
Switch Pins Before Entering
Boost Mode
(T
A
= 25°C unless otherwise specified).
TEMPERATURE (°C)
–55
CHANGE FROM 25°C
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
V
IN
= V
OUT
= 3.3V
50ns/DIV
3442 G15
SW1
2V/DIV
SW2
2V/DIV
V
IN
= 2.9V
V
OUT
= 3.3V AT 500mA
50ns/DIV
3442 G16
SW1
2V/DIV
SW2
2V/DIV
V
IN
= 3.3V
V
OUT
= 3.3V AT 500mA
50ns/DIV
3442 G17
SW1
2V/DIV
SW2
2V/DIV
V
IN
= 4.2V
V
OUT
= 3.3V AT 500mA
1µs/DIV
3442 G18
V
OUT
20mV/DIV
AC COUPLED
V
IN
= 4.2V
V
IN
= 3.3V
V
IN
= 2.7V
100µs/DIV
3442 G19
V
IN
= 3.6V
V
OUT
= 3.3V
C
OUT
= 47µF, X5R CERAMIC
LOAD
0.5A/DIV
V
OUT
100mV/DIV
100µs/DIV
3442 G20
V
IN
= 3.6V
V
OUT
= 3.3V
C
OUT
= 47µF, X5R CERAMIC + 100µF
LOW ESR TANTALUM
LOAD
0.5A/DIV
V
OUT
100mV/DIV
20µs/DIV
3442 G21
C
OUT
= 100F
LOW ESR TANTALUM
INDUCTOR
CURRENT
0.5A/DIV
V
OUT
50mV/DIV
TEMPERATURE (°C)
–55
CHANGE FROM 25°C
0.0%
0.5%
1.0%
105
3442 G13
–0.5%
–1.0%
–2.0%
–15 25 65–35 1255 45 85
–1.5%
2.0%
1.5%