Datasheet

LTC3555/LTC3555-X
2
3555fd
ABSOLUTE MAXIMUM RATINGS
V
BUS
(Transient) t < 1ms,
Duty Cycle < 1%
.......................................... –0.3V to 7V
V
IN1
, V
IN2
, V
IN3
, V
BUS
(Static), DV
CC
,
FB1, FB2, FB3, NTC, BAT, EN1, EN2, EN3,
I
LIM0
, I
LIM1
, SCL, SDA, RST3, CHRG ............ –0.3V to 6V
I
CLPROG
....................................................................3mA
I
RST3
, I
CHRG
............................................................50mA
I
PROG
........................................................................2mA
I
LDO3V3
...................................................................30mA
I
SW1
, I
SW2
............................................................600mA
I
SW
, I
SW3
, I
BAT
, I
VOUT
..................................................2A
Junction Temperature
........................................... 125°C
Operating Temperature Range (Note 2).... –40°C to 85°C
Storage Temperature Range
................... –65°C to 125°C
(Notes 1, 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PowerPath Switching Regulator
V
BUS
Input Supply Voltage 4.35 5.5 V
I
BUSLIM
Total Input Current 1x Mode, V
OUT
= BAT
5x Mode, V
OUT
= BAT
10x Mode, V
OUT
= BAT
Suspend Mode, V
OUT
= BAT
l
l
l
l
87
436
800
0.31
95
460
860
0.38
100
500
1000
0.50
mA
mA
mA
mA
I
VBUSQ
V
BUS
Quiescent Current 1x Mode, I
OUT
= 0mA
5x Mode, I
OUT
= 0mA
10x Mode, I
OUT
= 0mA
Suspend Mode, I
OUT
= 0mA
7
15
15
0.044
mA
mA
mA
mA
9 10
TOP VIEW
29
UFD PACKAGE
28-LEAD (4mm
×
5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
LDO3V3
CLPROG
NTC
FB2
V
IN2
SW2
EN2
DV
CC
GATE
CHRG
PROG
FB1
V
IN1
SW1
EN1
RST3
I
LIM1
I
LIM0
SW V
BUS
V
OUT
BAT
SCL
SDA
V
IN3
SW3
EN3
FB3
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 125°C, θ
JA
= 37°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, DV
CC
= 3.3V, R
PROG
= 1k, R
CLPROG
= 3k,
unless otherwise noted.
PIN CONFIGURATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3555EUFD#PBF LTC3555EUFD#TRPBF 3555 28-Lead (4mm x 5mm) Plastic QFN –40°C to 85°C
LTC3555IUFD#PBF LTC3555IUFD#TRPBF 3555 28-Lead (4mm x 5mm) Plastic QFN –40°C to 85°C
LTC3555EUFD-1#PBF LTC3555EUFD-1#TRPBF 35551 28-Lead (4mm x 5mm) Plastic QFN –40°C to 85°C
LTC3555IUFD-1#PBF LTC3555IUFD-1#TRPBF 35551 28-Lead (4mm x 5mm) Plastic QFN –40°C to 85°C
LTC3555EUFD-3#PBF LTC3555EUFD-3#TRPBF 35553 28-Lead (4mm x 5mm) Plastic QFN –40°C to 85°C
LTC3555IUFD-3#PBF LTC3555IUFD-3#TRPBF 35553 28-Lead (4mm x 5mm) Plastic QFN –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ORDER INFORMATION
ELECTRICAL CHARACTERISTICS