ltc3552 Linear Technology Corporation, ltc3552 Datasheet - Page 3

• Manufacturer Part Number: ltc3552
• Description: Standalone Linear Li-ion Battery Charger And Dual Synchronous Buck Converter
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
V
V
R
V
I
V
V
V
ΔV
T
R
t
t
t
Switching Regulator
V
I
V
ΔV
ΔV
I
f
f
I
R
I
POR
V
I
TERM
SS-CHRG
RECHRG
TERM
FB
S
OSC
SYNC
LIM
SW(LKG)
RUN
ASD
LIM
⎯ E ⎯ N (IL)
⎯ E ⎯ N (IH)
⎯ E ⎯ N
PROG
⎯ C ⎯ H ⎯ R ⎯ G
⎯ P ⎯ W ⎯ R
ON-CHRG
CC
FB
DS(ON)
RUN
RECHRG
LINE_REG
LOAD_REG
PARAMETER
⎯ E ⎯ N Pin Input Low Voltage
⎯ E ⎯ N Pin Input High Voltage
⎯ E N Pin Pull-Down Resistor
V
Charge Termination Current Threshold
PROG Pin Voltage
⎯ C ⎯ H ⎯ R ⎯ G Pin Output Low Voltage
⎯ P ⎯ W ⎯ R Pin Output Low Voltage
Recharge Battery Threshold Voltage
Junction Temperature in Constant-
Temperature Mode
Charger’s Power FET On-Resistance
(Between V
Charger Soft-Start Time
Recharge Comparator Filter Time
Termination Comparator Filter Time
Operating Voltage Range for Regulator
Feedback Pin Input Current
Feedback Voltage (Note 5)
Reference Voltage Line Regulation
Output Voltage Load Regulation
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit Regulator 1
Peak Switch Current Limit Regulator 2
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Power-On Reset Threshold
Power-On Reset On-Resistance
Power-On Reset Delay
RUN Threshold Voltage
RUN Leakage Current
Input DC Supply Current
IN
Active Mode
Sleep Mode
Shutdown
– V
BAT
Lockout Threshold Voltage
IN
and BAT)
A
= 25°C. V
CONDITIONS
V
V
R
R
R
I
I
V
I
V
I
Threshold
0°C ≤ T
–40°C ≤ T
V
(Note 5)
V
V
RUN = 0V, V
V
V
V
(Note 6)
(Note 6)
V
V
⎯ C ⎯ H ⎯ R ⎯ G
⎯ P ⎯ W ⎯ R
BAT
BAT
IN
IN
FLOAT
BAT
CC
FB1
FB1
FB
CC
CC
CC
FB
TERM
TERM
PROG
The
from Low to High
from High to Low
= 0.6V
Ramping Down, MODE/SYNC = 0V
= 2.5V to 5.5V (Note 5)
= 3V, V
= 3V, V
= 5V, V
= 0 to I
Drops Below Charge Termination
= V
= V
High to Low
= 5mA
= 5mA
= 1k
= 5k
= 10k, Current Mode
– V
A
FB2
FB2
●
IN
≤ 85°C
A
RECHRG
denotes the specifi cations which apply over the full operating
FB
FB
RUN
= 5V, V
BAT
≤ 85°C
= 0.5V
= 0.63V, MODE/SYNC = 3.6V
CC
= 0.5V, Duty Cycle < 35%
= 0.5V, Duty Cycle < 35%
= 5.5V, MODE/SYNC = 0V
= 1000V/R
= 0V, V
, 0°C < T
CC
FB
= 3.6V unless otherwise noted.
= 0V
PROG
A
< 85°C
●
●
●
●
●
●
●
●
●
●
●
0.588
0.585
17.5
0.93
0.75
0.95
MIN
0.4
1.2
0.4
2.5
1.8
0.6
0.3
70
90
60
5
262,144
0.35
0.35
2.25
2.25
0.35
0.30
0.01
–8.5
0.01
TYP
100
100
100
120
600
100
700
100
0.7
0.7
0.6
0.6
0.3
0.5
0.1
1.2
0.7
30
20
40
2
1
2
1
1
LTC3552
0.612
0.612
MAX
22.5
1.07
0.45
0.45
140
110
140
950
200
0.6
0.6
4.5
2.5
5.5
0.5
2.7
1.6
0.9
1.5
50
30
60
1
5
1
1
1
UNITS
Cycles
3
MHz
MHz
3552f
%/V
MΩ
mΩ
mV
mV
mA
mA
mV
ms
ms
nA
µA
µA
µA
µA
µA
°C
µs
%
%
Ω
Ω
Ω
V
V
V
V
V
V
V
V
A
A
V