LTC3576-1_15 Datasheet, PDF (10/48 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.
Battery Charging from USB-HV
BUCK-USB
USB OTG from BAT-HV BUCK-BAT
V_OUT
1V/DIV
AC COUPLED
V_BUS
100mV/DIV
AC COUPLED
V_SW
5V/DIV
0V
HVOK
5V/DIV
0V
V_BUS = 5V
HV_IN = 12V
USING LT3653
500μs/DIV
V_OUT
1V/DIV
AC COUPLED
V_BUS
200mV/DIV
AC COUPLED
I_BAT
1A/DIV 0A
3576 G28
HVOK
5V/DIV
0V
V_BAT = 3.8V
I_BUS = 285mA
HV_IN = 12V
USING LT3653
500μs/DIV
3576 G29
Oscillator Frequency
vs Temperature
2.30
2.25
2.20
2.15
2.10
2.05
–40
V_OUT = 5V
V_OUT = 4.2V
V_OUT = 3.6V
V_OUT = 3V
V_OUT = 2.7V
–15
10
35
60
85
TEMPERATURE (°C)
3576 G30
OVP Connect Waveform
V_BUS
5V/DIV
OVP Disconnect Waveform
V_BUS
5V/DIV
Rising OVP Threshold
vs Temperature
6.280
6.275
OVGATE
5V/DIV
OVP INPUT
VOLTAGE
0V TO 5V
STEP 5V/DIV
500μs/DIV
OVGATE
5V/DIV
OVP INPUT
VOLTAGE
5V TO 10V
STEP 5V/DIV
3576 G31
500μs/DIV
3576 G32
OVGATE vs OVSENS
12 _{OVSENS CONNECTED}
TO INPUT THROUGH
10 6.2k RESISTOR
8
6
4
2
0
0
2
4
6
8
INPUT VOLTAGE (V)
3576 G34
10
OVGATE Quiescent Current
vs Temperature
37 _{VOVSENS = 5V}
35
33
31
29
27
–40
–15 10
35
60
85
TEMPERATURE (°C)
3576 G35
6.270
6.265
6.260
6.255
–40
–15 10
35
60
85
TEMPERATURE (°C)
3576 G33
RST3, CHRG Pin Current
vs Voltage (Pull-Down State)
100 _{VBUS = 5V}
BAT = 3.8V
80
60
40
20
0
0
1
2
3
4
5
RST3, CHRG PIN VOLTAGE (V)
3576 G36
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