LTC3550-1_15 Datasheet, PDF (3/24 Pages) Linear Technology – Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

LTC3550-1
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_DCIN = 5V, V_USBIN = 5V, V_CC = 3.6V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
V_ASD-DC
V_ASD-USB
Battery Charger
V_DCIN – V_BAT Lockout Threshold Voltage
V_USBIN – V_BAT Lockout Threshold
Voltage
V_DCIN from Low to High, V_BAT = 4.2V
V_DCIN from High to Low, V_BAT = 4.2V
V_USBIN from Low to High, V_BAT = 4.2V
V_USBIN from High to Low, V_BAT = 4.2V
I_DCIN
DCIN Supply Current
Charge Mode (Note 5)
Standby Mode
Shutdown Mode
R_IDC = 10k
Charge Terminated
ENABLE = 5V
I_USBIN
V_FLOAT
I_BAT
USBIN Supply Current
Charge Mode (Note 6)
Standby Mode
Shutdown Mode
Shutdown Mode
Regulated Output (Float) Voltage
BAT Pin Current
Constant-Current Mode
Constant-Current Mode
Constant-Current Mode
Standby Mode
Shutdown Mode
Sleep Mode
R_IUSB = 10k, V_DCIN = 0V
Charge Terminated
V_DCIN = 0V, ENABLE = 0V
V_DCIN > V_USBIN
I_BAT = 1mA
I_BAT = 1mA, 0°C < T_A < 85°C
R_IDC = 1.25k
R_IUSB = 2.1k
R_IDC = 10k or R_IUSB = 10k
Charge Terminated
Charger Disabled
DCIN = 0V, USBIN = 0V
V_IDC
V_IUSB
I_TERMINATE
ΔV_RECHRG
t_RECHRG
t_TERMINATE
t_SS
R_ON-DC
IDC Pin Regulated Voltage
IUSB Pin Regulated Voltage
Charge Current Termination Threshold
Recharge Battery Threshold Voltage
Recharge Comparator Filter Time
Termination Comparator Filter Time
Soft-Start Time
Power FET On-Resistance (Between
DCIN and BAT)
Constant-Current Mode
Constant-Current Mode
R_ITERM = 1k
R_ITERM = 2k
R_ITERM = 10k
R_ITERM = 20k
V_FLOAT – V_RECHRG, 0°C < T_A < 85°C
V_BAT from High to Low
I_BAT Drops Below Termination Threshold
I_BAT = 10% to 90% Full-Scale
R_ON-USB
Power FET On-Resistance (Between
USBIN and BAT)
T_LIM
Junction Temperature in Constant-
Temperature Mode
Switching Regulator
V_OUT
ΔV_OUT
I_PK
V_LOADREG
I_S
Regulated Output Voltage
Output Voltage Line Regulation
Peak Inductor Current
Output Voltage Load Regulation
Input DC Bias Current
Active Mode
Sleep Mode
Shutdown
I_OUT = 100mA
V_CC = 3V, V_OUT = 1.7V
(Note 7)
V_OUT = 1.7V, I_LOAD = 0A
V_OUT = 1.94V, I_LOAD = 0A
V_RUN = 0V, V_CC = 5.5V
MIN
140
20
140
20
●
●
●
●
4.175
4.158
● 760
● 450
● 93
0.95
0.95
● 90
● 45
● 8.5
●
4
65
3
0.8
175
● 1.819
●
0.75
TYP
180
50
180
50
250
50
20
250
50
18
10
4.2
4.2
800
476
100
–3
–1
±1
1.0
1.0
100
50
10
5
100
6
1.5
250
400
550
105
1.875
0.04
1
0.5
300
20
0.1
MAX
220
80
220
80
800
100
40
800
100
36
20
4.225
4.242
840
500
107
–6
–2
±2
1.05
1.05
110
55
11.5
6
135
9
2.2
325
1.931
0.4
1.25
400
35
1
UNITS
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
V
V
mA
mA
mA
µA
µA
µA
V
V
mA
mA
mA
mA
mV
ms
ms
µs
mΩ
mΩ
°C
V
%/V
A
%
µA
µA
µA
35501f
3