LTC3586-2 Datasheet, PDF (10/36 Pages) –

LTC3586-2/LTC3586-3
TYPICAL PERFORMANCE CHARACTERISTICS (T_A = 25°C unless otherwise noted.)
Switching Regulators 1, 2 Load
Regulation at V_{OUT1, 2} = 1.2V
1.230
V_BUS = 3.8V
1.215
Burst Mode
OPERATION
1.200
1.185
PULSE-SKIPPING
MODE
Switching Regulators 1, 2 Load
Regulation at V_{OUT1, 2} = 1.8V
1.845
V_BUS = 3.8V
Burst Mode OPERATION
1.823
PULSE-SKIPPING MODE
1.800
1.778
Switching Regulators 1, 2 Load
Regulation at V_{OUT1, 2} = 2.5V
2.56
V_BUS = 3.8V
2.53 ^{Burst Mode OPERATION}
PULSE-SKIPPING MODE
2.50
2.47
1.170
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
358623 G25
1.755
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
358623 G26
2.44
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
358623 G27
Buck-Boost Regulator Efficiency
vs I_LOAD
100
90
80
Burst Mode
OPERATION
70
CURVES
60
V_IN3 = 3V
V_IN3 = 3.6V
50
V_IN3 = 4.5V
40
PWM MODE
CURVES
V_IN3 = 3V
V_IN3 = 3.6V
V_IN3 = 4.5V
30
R_DS(ON) For Buck-Boost Regulator
0.30
0.40
PMOS V_IN3 = 3V
0.25
PMOS V_IN3 = 3.6V
PMOS V_IN3 = 4.5V
0.35
0.20
0.30
0.15
NMOS V_IN3 = 3V
NMOS V_IN3 = 3.6V
0.25
NMOS V_IN3 = 4.5V
0.10
0.20
20
10
0
0.1
0.05
0.15
V_OUT3 = 3.3V
TYPE 3 COMPENSATION
0
0.10
1
10
100
1000
–55 –35 –15 5 25 45 65 85 105 125
I_LOAD (mA)
TEMPERATURE (°C)
358623 G28
358623 G29
Buck-Boost Regulator Forward
Current Limit
2600
V_IN3 = 3V
2550
2500
V_IN3 = 3.6V
V_IN3 = 4.5V
2450
2400
2350
2300
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
358623 G30
Buck-Boost Regulator Burst Mode
Operation Quiescent Current
14.0
13.5
V_IN3 = 4.5V
13.0
V_IN1 = 3V
V_IN3 = 3.6V
12.5
Reduction in Current
Deliverability at Low V_IN3
300
STEADY-STATE I_LOAD
START-UP WITH A
250
RESISTIVE LOAD
START-UP WITH A
CURRENT SOURCE LOAD
200
150
12.0
100
10
11.5
11.0
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
358623 G31
50
V_OUT3 = 3.3V
TYPE 3 COMPENSATION
0
2.7 3.1 3.5 3.9 4.3 4.7
V_IN3 (V)
358623 G32
358623f