LTC3557-1 Linear Technology, LTC3557-1 Datasheet - Page 3

• Manufacturer Part Number: LTC3557-1
• Description: USB Power Manager
• Manufacturer: Linear Technology

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POWER MANAGER ELECTRICAL CHARACTERISTICS
The
V
SYMBOL
V
R
Battery Charger
V
I
I
V
V
h
I
V
ΔV
t
t
h
R
T
NTC
V
V
V
I
Ideal Diode
V
R
I
Always On 3.3V Supply
V
R
R
CHG
BAT
TRKL
TERM
BADBAT
NTC
MAX
PROG
C/10
LIM
DUVLO
FLOAT
PROG
PROG(TRKL)
TRKL
COLD
HOT
DIS
FWD
LDO3V3
BUS
ON_LIM
ON(CHG)
DROPOUT
OL(LDO3V3)
CL(LDO3V3)
RECHRG
●
= 5V, V
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T
BAT
PARAMETER
V
Lockout
Input Current Limit Power FET On-
Resistance (Between V
V
Constant Current Mode Charge Current
Battery Drain Current
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle Charge
Ratio of I
Trickle Charge Current
Trickle Charge Rising Threshold
Trickle Charge Falling Threshold
Recharge Battery Threshold Voltage
Safety Timer Termination Period
Bad Battery Termination Time
End-of-Charge Indication Current Ratio
Battery Charger Power FET On-Resistance
(Between V
Junction Temperature in Constant
Temperature Mode
Cold Temperature Fault Threshold Voltage
Hot Temperature Fault Threshold Voltage
NTC Disable Threshold Voltage
NTC Leakage Current
Forward Voltage Detection
Diode On-Resistance, Dropout
Diode Current Limit
Regulated Output Voltage
Open-Loop Output Resistance
Closed-Loop Output Resistance
BUS
BAT
= 3.8V, ILIM0 = ILIM1 = 5V, WALL = EN1 = EN2 = EN3 = 0V, R
Regulated Output Voltage
to V
BAT
OUT
OUT
to PROG Pin Current
Differential Undervoltage
and BAT)
BUS
and V
OUT
)
CONDITIONS
Rising Threshold
Falling Threshold
LTC3557
LTC3557, 0°C ≤ T
LTC3557-1
LTC3557-1, 0°C ≤ T
R
R
R
V
V
BAT < V
BAT < V
BAT Rising
BAT Falling
Threshold Voltage Relative to V
Timer Starts when BAT = V
BAT < V
(Note 6)
Rising NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
NTC = V
I
I
(Note 7)
0mA < I
BAT = 3.0V, V
OUT
OUT
BUS
BUS
PROG
PROG
PROG
= 10mA
= 1A
> V
= 0V, I
= 1k, Input Current Limit = 2A
= 2k, Input Current Limit = 1A
= 5k, Input Current Limit = 400mA
TRKL
TRKL
TRKL
LDO3V3
BUS
UVLO
OUT
= 5V
, Charger Off, I
BUS
< 25mA
= 0μA (Ideal Diode Mode)
A
= 0V
≤ 85°C
A
≤ 85°C
FLOAT
PROG
OUT
FLOAT
= 0μA
– 50mV
= 2k, R
LTC3557/LTC3557-1
CLPROG
●
●
●
●
= 2.1k.
4.179
4.165
4.079
4.065
0.085
MIN
950
465
180
–75
–50
2.5
3.2
0.4
1.2
3.1
40
75
34
5
4.200
4.200
4.100
4.100
1.000
0.100
1000
1000
–100
2.85
2.75
TYP
–50
500
200
200
110
200
0.2
0.5
0.1
1.3
1.3
1.7
3.6
3.3
3.2
55
50
76
35
50
15
24
50
6
4
4.221
4.235
4.121
4.135
0.115
MAX
1050
–115
100
535
220
100
3.0
4.8
0.6
2.2
3.5
27
60
77
36
50
25
A
= 25°C.
%V
%V
%V
%V
%V
mA/mA
mA/mA
UNITS
35571f
3
Hour
Hour
VNTC
VNTC
VNTC
VNTC
VNTC
mΩ
mΩ
mV
mV
mA
mA
mA
mA
mV
mV
mV
μA
μA
nA
°C
Ω
Ω
Ω
V
V
V
V
V
V
V
V
A
V