Datasheet

LTC3577/LTC3577-1
4
3577fa
ELECTRICAL CHARACTERISTICS
Power Manager. The l denotes the specifi cations which apply over the
full operating temperature range, otherwise specifi cations are at T
A
= 25°C. V
BUS
= 5V, V
BAT
= 3.8V, I
LIM0
= I
LIM1
= WALL = 0V,
V
INLDO1
= V
INLDO2
= V
IN12
= V
IN3
= V
OUT
, R
PROG
= 2k, R
CLPROG
= 2.1k, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Power Supply
V
BUS
Input Supply Voltage 4.35 5.5 V
I
BUS(LIM)
Total Input Current (Note 5) I
LIM0
= 0V, I
LIM1
= 0V (1x Mode)
I
LIM0
= 5V, I
LIM1
= 5V (5x Mode)
I
LIM0
= 5V, I
LIM1
= 0V (10x Mode)
l
l
l
80
450
900
90
475
950
100
500
1000
mA
mA
mA
I
BUSQ
Input Quiescent Current, POFF State 1x, 5x, 10x Modes
I
LIM0
= 0V, I
LIM1
= 5V (Suspend Mode)
0.42
0.042 0.1
mA
mA
h
CLPROG
Ratio of Measured V
BUS
Current to
CLPROG Program Current
1000 mA/mA
V
CLPROG
CLPROG Servo Voltage in Current
Limit
1x Mode
5x Mode
10x Mode
0.2
1.0
2.0
V
V
V
V
UVLO
V
BUS
Undervoltage Lockout Rising Threshold
Falling Threshold 3.5
3.8
3.7
3.9 V
V
V
DUVLO
V
BUS
to V
OUT
Differential Undervoltage
Lockout
Rising Threshold
Falling Threshold
50
–50
100 mV
mV
R
ON_ILIM
Input Current Limit Power FET On-
Resistance (Between V
BUS
and V
OUT
)
200 mΩ
Battery Charger
V
FLOAT
V
BAT
Regulated Output Voltage LTC3577
LTC3577, 0 ≤ T
A
≤ 85°C
LTC3577-1
LTC3577-1, 0 ≤ T
A
≤ 85°C
4.179
4.165
4.079
4.065
4.200
4.200
4.100
4.100
4.221
4.235
4.121
4.135
V
V
V
V
I
CHG
Constant-Current Mode Charge Current R
PROG
= 1k, Input Current Limit = 2A
R
PROG
= 2k, Input Current Limit = 1A
R
PROG
= 5k, Input Current Limit = 0.4A
l
l
l
950
465
180
1000
500
200
1050
535
220
mA
mA
mA
I
BATQ_HR
Battery Drain Current, Hard Reset V
BUS
= 0V, I
OUT
= 0µA 7 15 µA
I
BATQ_OFF
Battery Drain Current, POFF State V
BAT
= 4.3V, Charger Time Out
V
BUS
= 0V
6
40
27
100
µA
µA
I
BATQ_ON
Battery Drain Current, PON State
LDOs, and LED Backlight Disabled
V
BUS
= 0V, I
OUT
= 0µA, No Load on
Supplies, Burst Mode Operation (Note 10)
90 160 µA
V
PROG,CHG
PROG Pin Servo Voltage V
BAT
> V
TRKL
1.000 V
V
PROG,TRKL
PROG Pin Servo Voltage in Trickle
Charge
V
BAT
< V
TRKL
0.100 V
h
PROG
Ratio of I
BAT
to PROG Pin Current 1000 mA/mA
I
TRKL
Trickle Charge Current V
BAT
< V
TRKL
40 50 60 mA
V
TRKL
Trickle Charge Rising Threshold
Trickle Charge Falling Threshold
V
BAT
Rising
V
BAT
Falling 2.5
2.85
2.75
3.0 V
V
ΔV
RECHRG
Recharge Battery Threshold Voltage Threshold Voltage Relative to V
FLOAT
–75 –100 –125 mV
t
TERM
Safety Timer Termination Period Timer Starts When V
BAT
= V
FLOAT
– 50mV 3.2 4 4.8 Hour
t
BADBAT
Bad Battery Termination Time V
BAT
< V
TRKL
0.4 0.5 0.6 Hour
h
C/10
End-of-Charge Indication Current Ratio (Note 6) 0.085 0.1 0.11 mA/mA
R
ON_CHG
Battery Charger Power FET On-
Resistance (Between V
OUT
and BAT)
200 mΩ
T
LIM
Junction Temperature in Constant
Temperature Mode
110 °C