Datasheet

LTC3556
2
3556f
PIN CONFIGURATION 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, NTC, BAT, ENALL, SCL, SDA,
PGOODALL, CHRG ....................................... –0.3V to 6V
SEQ ....................–0.3V to Lesser of 6V or (V
OUT
+ 0.3V)
FB3, V
C3
..............–0.3V to Lesser of 6V or (V
IN3
+ 0.3V)
I
CLPROG
....................................................................3mA
I
PGOODALL
, I
CHRG
....................................................50mA
I
PROG
........................................................................2mA
I
LDO3V3
...................................................................30mA
I
SW1
, I
SW2
............................................................600mA
I
SW
, I
BAT
, I
VOUT
.............................................................2A
I
SWAB3
, I
SWCD3
, I
VOUT3
.............................................2.5A
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ................... –65°C to 125°C
(Note 1)
9 10
TOP VIEW
29
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
LDO3V3
CLPROG
NTC
SW1
V
IN1
FB1
FB3
V
C3
GATE
CHRG
PROG
SW2
V
IN2
FB2
SDA
PGOODALL
ENALL SEQ SW V
BUS
V
OUT
BAT
SWAB3
DV
CC
V
IN3
V
OUT3
SCL
SWCD3
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
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
BUS
= 5V, V
IN1
= V
IN2
= V
IN3
= V
OUT3
= 3.8V, BAT = 3.8V, DV
CC
= 3.3V,
R
PROG
= 1k, R
CLPROG
= 3.01k, unless otherwise noted.
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3556EUFD#PBF LTC3556EUFD#TRPBF 3556
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
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
h
CLPROG
(Note 4) Ratio of Measured V
BUS
Current to
CLPROG Program Current
1x Mode
5x Mode
10x Mode
Suspend Mode
224
1133
2140
11.3
mA/mA
mA/mA
mA/mA
mA/mA