LTC3576 Datasheet, PDF (4/48 Pages) Linear Technology – Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs

LTC3576/LTC3576-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_BUS = 5V, BAT = 3.8V, DV_CC = 3.3V, R_CLPROG = 3.01k, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overvoltage Protection
V_OVCUTOFF
V_OVGATE
Overvoltage Protection Threshold
OVGATE Output Voltage
t_RISE
OVGATE Time to Reach Regulation
Battery Charger
With 6.2k Series Resistor
V_OVSENS < V_OVCUTOFF
V_OVSENS > V_OVCUTOFF
OVGATE C_LOAD = 1nF
V_FLOAT
BAT Regulated Output Voltage
LTC3576
l
LTC3576-1
l
I_CHG
Constant Current Mode Charger Current R_PROG = 1k
R_PROG = 5k
I_BAT
Battery Drain Current
V_BUS > V_UVLO, Suspend Mode,
I_VOUT = 0μA
V_BUS = 0V, I_VOUT = 0μA
(Ideal Diode Mode)
V_PROG
V_{PROG_TRKL}
V_C/10
h_PROG
I_TRKL
V_TRKL
ΔV_TRKL
ΔV_RECHRG
t_TERM
t_BADBAT
h_C/10
V_CHRG
I_CHRG
R_{ON_CHG}
T_LIM
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle Charge BAT < V_TRKL
C/10 Threshold Voltage at PROG
Ratio of I_BAT to PROG Pin Current
Trickle Charge Current
Trickle Charge Threshold Voltage
BAT < V_TRKL, R_PROG = 1k
BAT Rising
Trickle Charge Hysteresis Voltage
Recharge Battery Threshold Voltage
Safety Timer Termination Period
Bad Battery Termination Time
End of Charge Current Ratio
CHRG Pin Output Low Voltage
CHRG Pin Leakage Current
Battery Charger Power FET On-
Resistance (Between V_OUT and BAT)
Junction Temperature in Constant
Temperature Mode
Threshold Voltage Relative to V_FLOAT
Timer Starts When V_BAT = V_FLOAT
BAT < V_TRKL
(Note 7)
I_CHRG = 5mA
V_CHRG = 5V
NTC
V_COLD
Cold Temperature Fault Threshold Voltage Rising Threshold
Hysteresis
6.1
6.35
6.7
1.88•V_OVSENS 12
0
1.25
4.179
4.165
4.079
4.065
980
185
2.7
–75
3.3
0.4
0.085
4.200
4.200
4.100
4.100
1030
206
3.6
28
1.000
0.100
100
1030
100
2.85
135
–100
4
0.5
0.1
65
0.18
110
4.221
4.235
4.121
4.135
1065
223
6
45
3.0
–125
5
0.6
0.112
100
1
75
76.5
78
1.5
V
V
V
ms
V
V
V
V
mA
mA
μA
μA
V
V
mV
mA/mA
mA
V
mV
mV
Hour
Hour
mA/mA
mV
μA
Ω
°C
%NTCBIAS
%NTCBIAS
V_HOT
V_DIS
I_NTC
Ideal Diode
V_FWD
R_DROPOUT
I_{MAX_DIODE}
Hot Temperature Fault Threshold Voltage
NTC Disable Threshold Voltage
NTC Leakage Current
Falling Threshold
Hysteresis
Falling Threshold
Hysteresis
NTC = NTCBIAS = 5V
Forward Voltage
Internal Diode On-Resistance Dropout
Diode Current Limit
I_VOUT = 10mA
I_VOUT = 200mA
33.4
34.9
36.4 %NTCBIAS
1.5
%NTCBIAS
0.7
1.7
2.7 %NTCBIAS
50
mV
–50
50
nA
15
mV
0.18
Ω
2
A
3576f
4