LTC3589 Linear Technology, LTC3589 Datasheet - Page 10

• Manufacturer Part Number: LTC3589
• Description: 8-Output Regulator
• Manufacturer: Linear Technology

50mV/DIV
500mA/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
LTC3589
10
1A/DIV
1V/DIV
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–50
Burst Mode OPERATION
Step-Down Switching
Regulator Current Limit vs
Temperature
Step-Down Switching Regulator 1
Load Step
Buck-Boost Switching Regulator
Soft-Start
–25
0
V
TEMPERATURE (°C)
OUT
I
25
LOAD
V
40μs/DIV
OUT
BUCK1
100μs/DIV
BUCK2, BUCK3
50
75 100
I
L
125
3589 G16
3589 G22
3589 G19
150
200mV/DIV
1A/DIV
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–50
Buck-Boost Current Limit vs
Temperature
Buck-Boost Switching Regulator 1
Load Step
Dynamic Voltage Slew
V
RRCR
–25
= 1.75mV/μs
PEAK LIMIT
0
CLAMP LIMIT
V
TEMPERATURE (°C)
OUT
I
V
25
LOAD
OUT
40μs/DIV
200μs/DIV
50
PGOOD
V
STB
75 100
125
3589 G23
3589 G17
3589 G20
150
T
A
= 25°C, unless otherwise noted.
500mV/DIV
200mA/DIV
50mV/DIV
1A/DIV
0.5
2.5
2.0
1.5
1.0
0
2.5
Step-Down Switching Regulator
Soft-Start
PULSE-SKIPPING MODE
Step-Down Switching Regulator 1
Load Step
Maximum Buck-Boost Load
Current vs V
V
IN
= 3.0V
3.0
V
3.5
OUT
I
LOAD
IN
VOLTAGE (V)
200μs/DIV
40μs/DIV
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4.0
I
4.5
L
V
V
V
V
OUT
OUT
OUT
OUT
5.0
= 1.5V
= 3.3V
= 5V
3589 G18
3589 G21
3589 G24
3589p
5.5