LTC3550 Linear Technology, LTC3550 Datasheet - Page 3

• Manufacturer Part Number: LTC3550
• Description: Dual Input USB/AC Adapter Li-Ion Battery Charger
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
Battery Charger
I
I
V
I
V
V
I
I
V
ΔV
t
t
t
R
R
T
Switching Regulator
V
ΔV
I
V
DCIN
USBIN
BAT
TERMINATE
TRIKL
RECHRG
TERMINATE
SS
PK
LIM
FLOAT
IDC
IUSB
TRIKL
ON-DC
ON-USB
FB
LOADREG
RECHRG
FB
PARAMETER
DCIN Supply Current
USBIN Supply Current
Regulated Output (Float) Voltage
BAT Pin Current
IDC Pin Regulated Voltage
IUSB Pin Regulated Voltage
Charge Current Termination Threshold
Trickle Charge Current
Trickle Charge Threshold Voltage
Recharge Battery Threshold Voltage
Recharge Comparator Filter Time
Termination Comparator Filter Time
Soft-Start Time
Power FET On-Resistance (Between
DCIN and BAT)
Power FET On-Resistance (Between
USBIN and BAT)
Junction Temperature in Constant-
Temperature Mode
Regulated Feedback Voltage
Reference Voltage Line Regulation
Peak Inductor Current
Output Voltage Load Regulation
Charge Mode (Note 5)
Standby Mode
Shutdown Mode
Constant-Current Mode
Constant-Current Mode
Constant-Current Mode
Standby Mode
Shutdown Mode
Sleep Mode
Charge Mode (Note 6)
Standby Mode
Shutdown Mode
Shutdown Mode
A
= 25°C. V
CONDITIONS
R
Charge Terminated
ENABLE = 5V
R
Charge Terminated
V
V
I
I
R
R
R
Charge Terminated
Charger Disabled
DCIN = 0V, USBIN = 0V
Constant-Current Mode
Constant-Current Mode
R
R
R
R
V
V
V
Hysteresis
V
V
I
I
T
0°C ≤ T
–40°C ≤ T
V
BAT
BAT
BAT
BAT
A
DCIN
DCIN
BAT
BAT
BAT
FLOAT
BAT
CC
IDC
IUSB
IDC
IUSB
IDC
ITERM
ITERM
ITERM
ITERM
= 25°C
The
= 3V, V
= 1mA
= 1mA, 0°C < T
= 10% to 90% Full-Scale
Drops Below Termination Threshold
= 10k
= 1.25k
= 10k or R
< V
< V
Rising
from High to Low
= 10k, V
= 0V, ENABLE = 0V
> V
= 2.1k
– V
= 1k
= 2k
= 10k
= 20k
A
●
TRIKL
TRIKL
DCIN
≤ 85°C
USBIN
A
RECHRG
denotes the specifi cations which apply over the full operating
FB
≤ 85°C
; R
; R
= 0.5V
= 5V, V
DCIN
IUSB
IDC
IUSB
, 0°C < T
= 0V
A
= 1.25k
= 10k
= 2.1k
< 85°C
USBIN
A
< 85°C
= 5V, V
CC
= 3.6V unless otherwise noted.
●
●
●
●
●
●
●
●
●
●
●
●
●
0.5880
0.5865
0.5850
4.175
4.158
0.95
0.95
0.75
MIN
760
450
175
8.5
2.8
0.8
93
90
45
60
30
65
4
3
47.5
0.04
TYP
250
250
800
476
100
100
100
100
250
400
550
105
4.2
4.2
1.0
1.0
2.9
1.5
0.6
0.6
0.6
0.5
50
20
50
18
10
–3
–1
±1
50
10
80
5
6
1
LTC3550
0.6120
0.6135
0.6150
4.225
4.242
MAX
1.05
1.05
11.5
1.25
800
100
800
100
840
500
107
110
100
135
325
2.2
0.4
40
36
20
–6
–2
±2
55
65
6
3
9
UNITS
3550fa
3
%/V
mΩ
mΩ
mA
mA
mA
mA
mA
mA
mA
mA
mA
mV
mV
ms
ms
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µs
°C
%
V
V
V
V
V
V
V
V
A