Datasheet

LTC3554/LTC3554-1/
LTC3554-2/LTC3554-3
3
3554123fd
POWER MANAGER ELECTRICAL CHARACTERISTICS
The l denotes specifications that
apply over the full operating junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2), V
BUS
= 5V, V
BAT
= 3.8V,
HPWR = SUSP = PWR_ON1 = PWR_ON2 = 0V, R
PROG
= 1.87k, STBY = High, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
No-Load Quiescent Currents
I
BATQ
Battery Drain Current I
OUT
= 0 (Note 5)
V
BUS
= 0V (Hard Reset)
V
BUS
= 0V
V
BUS
= 0V, PWR_ON1 = PWR_ON2 = 3.8V
0.2
3
6.5
2
5
12
µA
µA
µA
I
BATQC
Battery Drain Current, V
BUS
Available V
BAT
= V
FLOAT
, Timer Timed Out 5 8 µA
I
BUSQ
V
BUS
Input Current 100mA, 500mA Modes
SUSP = 5V (Suspend Mode)
300
15
500
30
µA
µA
I
BVINQ
BVIN Input Current
Shutdown Input Current
One Buck Enabled, Standby Mode
Both Bucks Enabled, Standby Mode
One Buck Enabled
Both Bucks Enabled
V
BVIN
= 3.8V, V
BUS
= 0V (Note 8)
PWR_ON1 = STBY = 3.8V
PWR_ON1 = PWR_ON2 = STBY = 3.8V
PWR_ON1 = 3.8V, STBY = 0V
PWR_ON1 = PWR_ON2 = 3.8V, STBY = 0V
0.01
1.5
3
18
36
1
3
6
35
70
µA
µA
µA
µA
µA
Input Power Supply
V
BUS
Input Supply Voltage 4.35 5.5 V
I
BUS(LIM)
Total Input Current HPWR = 0V (100mA)
HPWR = 5V (500mA)
l
l
80
400
90
450
100
500
mA
mA
V
UVLO
V
BUS
Undervoltage Lockout Rising Threshold
Falling Threshold 3.5
3.8
3.6
3.9 V
V
V
DUVLO
V
BUS
to BAT Differential Undervoltage
Lockout
Rising Threshold
Falling Threshold 0
200
50
300 mV
mV
R
ON_ILIM
Input Current Limit Power FET
On-Resistance (Between V
BUS
and V
OUT
)
350 mΩ
Battery Charger
V
FLOAT
V
BAT
Regulated Output Voltage LTC3554/LTC3554-2/LTC3554-3
LTC3554/LTC3554-2/LTC3554-3, 0°C < T
A
< 85°C
LTC3554-1
LTC3554-1, 0°C < T
A
< 85°C
4.179
4.165
4.079
4.065
4.2
4.2
4.1
4.1
4.221
4.235
4.121
4.135
V
V
V
V
I
CHG
Constant-Current Mode Charge Current R
PROG
= 1.87k, 0 ≤ T
A
≤ 85°C 380 400 420 mA
V
PROG
V
PROG,TRKL
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle Charge V
BAT
< V
TRKL
1
0.1
V
V
h
PROG
Ratio of I
BAT
to PROG Pin Current 750 mA/mA
I
TRKL
Trickle Charge Current V
BAT
< V
TRKL
30 40 50 mA
V
TRKL
Trickle Charge Threshold Voltage V
BAT
Rising
V
BAT
Falling 2.6
2.9
2.75
3 V
V
ΔV
RECHRG
Recharge Battery Threshold Voltage Threshold Voltage Relative to V
FLOAT
–75 –100 –115 mV
t
TERM
Safety Timer Termination Period Timer Starts when V
BAT
= V
FLOAT
– 50mV 3.2 4 5 Hour
t
BADBAT
Bad Battery Termination Time V
BAT
< V
TRKL
0.4 0.5 0.63 Hour
h
C/10
End-of-Charge Indication Current Ratio (Note 6) 0.085 0.1 0.115 mA/mA
R
ON_CHG
Battery Charger Power FET
On-Resistance (Between V
OUT
and BAT)
I
BAT
= 200mA 220 mΩ
T
LIM
Junction Temperature in Constant
Temperature Mode
110 °C
NTC
V
COLD
Cold Temperature Fault Threshold Voltage Rising NTC Voltage
Hysteresis
75 76
1.3
77 %V
BUS
%V
BUS
V
HOT
Hot Temperature Fault Threshold Voltage Falling NTC Voltage
Hysteresis
34 35
1.3
36 %V
BUS
%V
BUS