Datasheet

LTC3559/LTC3559-1
3
3559fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ΔV
DUVLO
Differential Undervoltage Lockout
Hysteresis
BAT = 4.05V (LTC3559)
BAT = 3.95V (LTC3559-1)
130
130
mV
mV
V
PROG
PROG Pin Servo Voltage HPWR = 5V
HPWR = 0V
BAT < V
TRKL
1.000
0.200
0.100
V
V
V
h
PROG
Ratio of I
BAT
to PROG Pin Current 800 mA/mA
I
TRKL
Trickle Charge Current BAT < V
TRKL
36 46 56 mA
V
TRKL
Trickle Charge Threshold Voltage BAT Rising 2.8 2.9 3.0 V
ΔV
TRKL
Trickle Charge Hysteresis Voltage 100 mV
ΔV
RECHRG
Recharge Battery Threshold Voltage Threshold Voltage Relative to V
FLOAT
–85 –100 –130 mV
t
RECHRG
Recharge Comparator Filter Time BAT Falling 1.7 ms
t
TERM
Safety Timer Termination Period BAT = V
FLOAT
3.5 4 4.5 Hour
t
BADBAT
Bad Battery Termination Time BAT < V
TRKL
0.4 0.5 0.6 Hour
h
C/10
End-of-Charge Indication Current Ratio (Note 5) 0.085 0.1 0.11 mA/mA
t
C/10
End-of-Charge Comparator Filter Time I
BAT
Falling 2.2 ms
R
ON(CHG)
Battery Charger Power FET On-Resistance
(Between V
CC
and BAT)
I
BAT
= 190mA 500
mΩ
T
LIM
Junction Temperature in Constant
Temperature Mode
105 °C
NTC
V
COLD
Cold Temperature Fault Threshold Voltage Rising NTC Voltage
Hysteresis
75 76.5
1.6
78 %V
CC
%V
CC
V
HOT
Hot Temperature Fault Threshold Voltage Falling NTC Voltage
Hysteresis
33.4 34.9
1.6
36.4 %V
CC
%V
CC
V
DIS
NTC Disable Threshold Voltage Falling NTC Voltage
Hysteresis
l
0.7 1.7
50
2.7 %V
CC
mV
I
NTC
NTC Leakage Current V
NTC
= V
CC
= 5V –1 1 μA
Logic (HPWR, SUSP, CHRG)
V
IL
Input Low Voltage HPWR, SUSP Pins 0.4 V
V
IH
Input High Voltage HPWR, SUSP Pins 1.2 V
R
DN
Logic Pin Pull-Down Resistance HPWR, SUSP Pins
l
1.9 4 6.3
MΩ
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA 100 250 mV
I
CHRG
CHRG Pin Input Current BAT = 4.5V, V
CHRG
= 5V 0 1 μA
Buck Switching Regulators, BAT = PV
IN
= 3.8V, EN1 = EN2 = 3.8V
PV
IN
Input Supply Voltage LTC3559
LTC3559-1
l
l
3
3
4.2
4.1
V
V
I
PVIN
Pulse Skip Supply Current
Burst Mode Supply Current
Shutdown Supply Current
Supply Current in UVLO
MODE = 0 (One Buck Enabled) (Note 6)
MODE = 1 (One Buck Enabled) (Note 6)
EN1 = EN2 = 0V
PV
IN
= 2.0V
l
220
35
0
4
400
50
2
8
μA
μA
μA
μA
PV
IN
UVLO PV
IN
Falling
PV
IN
Rising
2.45
2.55
V
V
f
OSC
Switching Frequency MODE = 0V 1.91 2.25 2.59 MHz
V
IL
Input Low Voltage MODE, EN1, EN2 0.4 V
V
IH
Input High Voltage MODE, EN1, EN2 1.2 V
I
LIMSW
Peak PMOS Current Limit MODE = 0V or 3.8V 550 800 1050 mA
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations that apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C.