LTC3576 Datasheet, PDF (9/48 Pages) Linear Technology – Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs

LTC3576/LTC3576-1
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified.
OTG Boost Quiescent Current
vs V_OUT Voltage
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
2.90
3.55
4.20
4.85
5.50
V_OUT (V)
3576 G19
OTG Boost Efficiency
vs V_OUT Voltage
95
500mA LOAD
90
100mA LOAD
85
80
75
OTG Boost V_BUS Voltage
vs Load Current
5.5
5.0
V_BUS = 4.75V
4.5
I_VBUS = 500mA
4.0
3.5
3.0
0
V_OUT = 5V
V_OUT = 4.4V
V_OUT = 3.8V
V_OUT = 3.2V
100 200 300 400 500 600 700
LOAD CURRENT (mA)
3576 G20
OTG Boost Start-Up Time into
Current Source Load vs V_OUT
Voltage
2.50
22μF ON V_BUS, 22μF AND
2.25
LOAD THROUGH OVP
2.00
22μF ON V_BUS,
NO OVP
22μF ON V_BUS,
LOAD THROUGH OVP
1.75
OTG Boost Efficiency
vs Load Current
100
90
80
70
60
50
40
1
V_OUT = 5V
V_OUT = 4.4V
V_OUT = 3.8V
V_OUT = 3.2V
10
100
LOAD CURRENT (mA)
1000
3576 G21
OTG Boost Burst Mode Current
Threshold vs V_OUT Voltage
400
300
RISING THRESHOLD
FALLING THRESHOLD
200
100
70
2.90
3.55
4.20
V_OUT (V)
4.85
5.50
3576 G22
1.50
2.9 3.4 3.9 4.4 4.9 5.4
V_OUT (V)
3576 G23
0
2.90
3.55
4.20
4.85
5.50
VOUT (V)
3576 G24
OTG Boost Transient Response
OTG Boost Start-Up into Current
Source Load
OTG Boost Burst Mode Operation
V_BUS
50mV/DIV
AC COUPLED
I_VBUS
200mA/DIV
0mA
V_OUT = 3.8V
20μs/DIV
I_VBUS
200mA/DIV
0mA
V_BUS
2V/DIV
0V
3576 G25
V_OUT = 3.8V 200μs/DIV
I_LOAD = 500mA
V_BUS
50mV/DIV
AC COUPLED
V_SW
1V/DIV
3576 G26
0V
V_OUT = 3.8V
I_LOAD = 10mA
50μs/DIV
3576 G27
3576f
9