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LTC3576-1 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3576-1
Description  Switching Power Manager with USB On-the-Go Triple Step-Down DC/DCs
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3576-1 Datasheet(HTML) 4 Page - Linear Technology

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LTC3576/LTC3576-1
4
3576f
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, DVCC = 3.3V, RCLPROG = 3.01k, unless
otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overvoltage Protection
VOVCUTOFF
Overvoltage Protection Threshold
With 6.2k Series Resistor
6.1
6.35
6.7
V
VOVGATE
OVGATE Output Voltage
VOVSENS < VOVCUTOFF
VOVSENS > VOVCUTOFF
1.88•VOVSENS
0
12
V
V
tRISE
OVGATE Time to Reach Regulation
OVGATE CLOAD = 1nF
1.25
ms
Battery Charger
VFLOAT
BAT Regulated Output Voltage
LTC3576
l
4.179
4.165
4.200
4.200
4.221
4.235
V
V
LTC3576-1
l
4.079
4.065
4.100
4.100
4.121
4.135
V
V
ICHG
Constant Current Mode Charger Current
RPROG = 1k
RPROG = 5k
980
185
1030
206
1065
223
mA
mA
IBAT
Battery Drain Current
VBUS > VUVLO, Suspend Mode,
IVOUT = 0μA
3.6
6
μA
VBUS = 0V, IVOUT = 0μA
(Ideal Diode Mode)
28
45
μA
VPROG
PROG Pin Servo Voltage
1.000
V
VPROG_TRKL
PROG Pin Servo Voltage in Trickle Charge BAT < VTRKL
0.100
V
VC/10
C/10 Threshold Voltage at PROG
100
mV
hPROG
Ratio of IBAT to PROG Pin Current
1030
mA/mA
ITRKL
Trickle Charge Current
BAT < VTRKL, RPROG = 1k
100
mA
VTRKL
Trickle Charge Threshold Voltage
BAT Rising
2.7
2.85
3.0
V
ΔVTRKL
Trickle Charge Hysteresis Voltage
135
mV
ΔVRECHRG
Recharge Battery Threshold Voltage
Threshold Voltage Relative to VFLOAT
–75
–100
–125
mV
tTERM
Safety Timer Termination Period
Timer Starts When VBAT = VFLOAT
3.3
4
5
Hour
tBADBAT
Bad Battery Termination Time
BAT < VTRKL
0.4
0.5
0.6
Hour
hC/10
End of Charge Current Ratio
(Note 7)
0.085
0.1
0.112
mA/mA
VCHRG
CHRG Pin Output Low Voltage
ICHRG = 5mA
65
100
mV
ICHRG
CHRG Pin Leakage Current
VCHRG = 5V
1
μA
RON_CHG
Battery Charger Power FET On-
Resistance (Between VOUT and BAT)
0.18
Ω
TLIM
Junction Temperature in Constant
Temperature Mode
110
°C
NTC
VCOLD
Cold Temperature Fault Threshold Voltage Rising Threshold
Hysteresis
75
76.5
1.5
78
%NTCBIAS
%NTCBIAS
VHOT
Hot Temperature Fault Threshold Voltage
Falling Threshold
Hysteresis
33.4
34.9
1.5
36.4
%NTCBIAS
%NTCBIAS
VDIS
NTC Disable Threshold Voltage
Falling Threshold
Hysteresis
0.7
1.7
50
2.7
%NTCBIAS
mV
INTC
NTC Leakage Current
NTC = NTCBIAS = 5V
–50
50
nA
Ideal Diode
VFWD
Forward Voltage
IVOUT = 10mA
15
mV
RDROPOUT
Internal Diode On-Resistance Dropout
IVOUT = 200mA
0.18
Ω
IMAX_DIODE
Diode Current Limit
2
A


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