LTC3589 Linear Technology, LTC3589 Datasheet - Page 9

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

TYPICAL PERFORMANCE CHARACTERISTICS
100
2.30
2.25
2.20
2.15
2.10
2.05
2.00
1.95
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0.01
0.01
–50
Oscillator Frequency vs
Temperature
Buck-Boost Effi ciency vs I
Step-Down Switching Regulator 3
Effi ciency vs I
V
V
OUT
OUT
BURST
= 1.2V
= 3.3V
0.1
0.1
–10
BURST
PULSE-
SKIPPING
LOAD CURRENT (mA)
LOAD CURRENT (mA)
TEMPERATURE (°C)
1
1
30
OUT
10
10
70
FORCED
CONTINUOUS
FORCED
CONTINUOUS
100
100
V
V
V
IN
IN
IN
OUT
110
= 5.0V
= 4.2V
= 3.0V
1000
1000
3589 G13
3589 G10
3589 G07
150
–0.2
–0.4
–0.6
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
–0.8
100
1.0
0.8
0.6
0.4
0.2
90
80
70
60
50
40
30
20
10
0
0
0
0.01
–50
2.5
Step-Down Switching Regulator
R
Switching Frequency Change vs V
Step-Down Switching Regulator 1
Effi ciency vs I
V
DS(ON)
OUT
3.0
= 1.2V
0.1
BUCK2 PMOS
BUCK1 NMOS
–10
vs Temperature
LOAD CURRENT (mA)
BURST
TEMPERATURE (°C)
3.5
1
VOLTAGE (V)
30
OUT
4.0
BUCK1 PMOS
BUCK2 NMOS
10
70
PULSE-SKIPPING
4.5
100
FORCED
CONTINUOUS
110
5.0
1000
3589 G11
3589 G08
3589 G14
T
150
IN
5.5
A
= 25°C, unless otherwise noted.
0.25
0.20
0.15
0.10
0.05
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0.01
0.01
–50
Buck-Boost R
Buck-Boost Effi ciency vs I
Step-Down Switching Regulator 2
Effi ciency vs I
V
V
OUT
IN
= 3.8V
= 1.8V
0.1
0.1
–10
BURST
LOAD CURRENT (mA)
LOAD CURRENT (mA)
TEMPERATURE (°C)
PMOS
BURST
1
1
DS(ON)
30
OUT
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LTC3589
10
10
PULSE-SKIPPING
FORCED
CONTINUOUS
vs Temperature
70
FORCED
CONTINUOUS
100
100
V
V
V
NMOS
OUT
OUT
OUT
OUT
110
= 5.0V
= 2.5V
= 3.3V
1000
1000
3589 G12
3589 G15
3589 G9
9
3589p
150