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| LTC3589-2_15 Datasheet, PDF (11/50 Pages) Linear Technology – 8-Output Regulator with Sequencing and I2C | |||
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LTC3589/LTC3589-1/
LTC3589-2
Typical Performance Characteristics VIN = 3.8V, TA = 25°C, unless otherwise noted.
Buck-Boost Switching Regulator
Soft-Start
1V/DIV
VOUT
500mA/DIV
IL
100µs/DIV
3589 G19
Dynamic Voltage Slew
1V/DIV
5V/DIV
5V/DIV
VOUT
PGOOD
VSTB
200µs/DIV
VRRCR = 1.75mV/µs
Step-Down Switching Regulator 1
Load Step
PULSE-SKIPPING MODE
50mV/DIV
VOUT
3589 G20
ILOAD
1A/DIV
40µs/DIV
LOAD CAPACITANCE = 44µF
3589 G21
Step-Down Switching Regulator 1
Load Step
Burst Mode OPERATION
50mV/DIV
VOUT
Buck-Boost Switching Regulator 1
Load Step
200mV/DIV
VOUT
ILOAD
1A/DIV
40µs/DIV
LOAD CAPACITANCE = 44µF
3589 G22
1A/DIV
ILOAD
40µs/DIV
LOAD CAPACITANCE = 22µF
3589 G23
LDO1 Dropout Voltage
vs Temperature
500
VLDO1 = 1.8V
400
300
VLDO1 = 3.3V
200
100
0
â50 â25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3589 G25
LDO1 Output Change vs VIN
0.5
VLDO1 = 25mA
0.0
â0.5
â1.0
â1.5
â2.0
2
VLDO1 = 1.2V
VLDO1 = 1.8V
VLDO1 = 2.8V
VLDO1 = 3.3V
3
4
5
VIN (V)
3589 G26
For more information www.linear.com/LTC3589
Maximum Buck-Boost Load
Current vs VIN
2.5
2.0
1.5
1.0
0.5
VOUT = 1.8V
VOUT = 3.3V
VOUT = 5V
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
3589 G24
LDO1 Short-Circuit Current
vs Temperature
80
70
60
50
40
30
20
â50 â25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3589 G27
3589fg
11
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