Datasheet

LTC3559/LTC3559-1
4
3559fb
TYPICAL PERFORMANCE CHARACTERISTICS
Suspend State Supply and BAT
Currents vs Temperature
Battery Regulation (Float)
Voltage vs Temperature
Battery Regulation (Float) Voltage
vs Battery Charge Current,
Constant-Voltage Charging
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
T
J
= T
A
+ (P
D
• θ
JA
°C/W)
Note 3: The LTC3559/LTC3559-1 are guaranteed to meet specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: V
CC
supply current does not include current through the PROG pin
or any current delivered to the BAT pin. Total input current is equal to this
specifi cation plus 1.00125 • I
BAT
where I
BAT
is the charge current.
Note 5: I
C/10
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
Note 6: FB high, regulator not switching.
TEMPERATURE (°C)
–55
0
CURRENT (μA)
1
3
4
5
10
7
–15
25
45
3559 G01
2
8
9
I
VCC
6
–35
5
65
85
V
CC
= 5V
BAT = 4.2V
SUSP = 5V
EN1 = EN2 = 0V
I
BAT
TEMPERATURE (°C)
–55
V
FLOAT
(V)
4.225
5
3559 G02
4.150
4.100
–35 –15 25
4.075
4.050
4.250
4.200
4.175
4.125
45 65 85
V
CC
= 5V
LTC3559
LTC3559-1
I
BAT
(mA)
100
V
BAT
(V)
4.180
4.190
4.205
4.200
900
3559 G03
4.170
4.160
4.175
4.185
4.195
4.165
4.155
4.150
300
500
700
2000
400
600
800
1000
V
CC
= 5V
HPWR = 5V
R
PROG
= 845Ω
EN1 = EN2 = 0V
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
FB
Feedback Voltage
l
780 800 820 mV
I
FB
FB Input Current FB1, FB2 = 0.82V –0.05 0.05 μA
D
MAX
Maximum Duty Cycle FB1, FB2 = 0V 100 %
R
PMOS
R
DS(ON)
of PMOS I
SW
= 150mA 0.65
Ω
R
NMOS
R
DS(ON)
of NMOS I
SW
= –150mA 0.75
Ω
R
SW(PD)
SW Pull-Down in Shutdown 13
kΩ
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations that apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C.