LTC3441 Linear Technology, LTC3441 Datasheet - Page 4

• Manufacturer Part Number: LTC3441
• Description: Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
• Manufacturer: Linear Technology

LTC3455
temperature range, otherwise specifications are at T
V
PARAMETER
Battery Charger
Regulated Charger V
Charger Current Limit (USB Powered)
Charger Current Limit (Wall Powered)
Recharge Battery Voltage Threshold
Trickle Charge Trip Threshold
Trickle Charge Trip Hysteresis
Trickle Charge Current
PROG Pin Current
PROG Pin Voltage
CHRG Pin Output Low Voltage
Timer Accuracy
Junction Temperature in
Constant Temperature Mode
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3455 is guaranteed to meet specified performance from
0 C to 70 C and is designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40 C and 85 C
TYPICAL PERFOR A CE CHARACTERISTICS
4
ELECTRICAL CHARACTERISTICS
USB
120
100
80
60
40
20
= 0V, V
0
–50
Burst Mode Quiescent Current
V
NOT SWITCHING
BAT
–25
= 3.6V
WALLFB
0
TEMPERATURE ( C)
BAT
BOTH SWITCHERS ENABLED
ONLY SWITCHER 1 ENABLED
= 0V unless otherwise noted.
25
Voltage
50
75
W
100
3455 G01
CONDITIONS
0 C T
R
R
R
V
Battery Voltage Rising
R
Internal Pull-Up Current, No R
R
I
C
U
CHRG
BAT(REGULATED)
TIMER
PROG
PROG
PROG
PROG
PROG
125
= 5mA
=2.49k , V
=2.49k , V
=2.49k , V
=2.49k , V
=2.49k
= 0.1 F
A
85 C
600
500
400
300
200
100
0
–50
A
– V
PWM Mode Quiescent Current
V
NOT SWITCHING
= 25 C. V
USBHP
USBHP
MAX
BAT
BAT
RECHARGE
–25
= 2V
= 3.6V
= 4.5V, 0 C T
The
= 2V, V
= 0V, V
0
TEMPERATURE ( C)
BAT
PROG
denotes the specifications which apply over the full operating
ONLY SWITCHER 1 ENABLED
BOTH SWITCHERS ENABLED
USB
USB
25
= 3.6V, V
= 5V, 0 C T
= 5V, 0 C T
Note 3: Quiescent current is pulled from the V
wall power is present, and from the V
power is present.
A
50
85 C
75
MAX
= 3.6V, V
100
A
A
3455 G02
85 C
85 C
125
PWRON
= 2V, V
5
4
3
2
1
0
–50
Shutdown Quiescent Current
V
BAT
4.158
MIN
425
MAX
–25
= 3.6V
ON
pin when either USB or Wall
is open, V
0
TEMPERATURE ( C)
BAT
4.200
2.85
1.23
0.75
TYP
400
500
150
105
50
60
65
2
10
25
pin when neither USB or
ON
50
4.242
MAX
= 0V,
470
575
90
75
100
UNITS
3455 G03
3455f
mA
mA
mV
mA
mA
mV
125
%
V
V
A
V
V
C