LTC3556_15 Datasheet, PDF (2/36 Pages) Linear Technology – High Effi ciency USB Power Manager with Dual Buck and Buck-Boost DC/DCs

LTC3556
ABSOLUTE MAXIMUM RATINGS
(Note 1)
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
PIN CONFIGURATION
TOP VIEW
28 27 26 25 24 23
LDO3V3 1
22 GATE
CLPROG 2
21 CHRG
NTC 3
20 PROG
SW1 4
V_IN1 5
FB1 6
19 SW2
29
18 V_IN2
17 FB2
FB3 7
16 SDA
V_C3 8
15 PGOODALL
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 37°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3556EUFD#PBF
LTC3556EUFD#TRPBF 3556
28-Lead (4mm × 5mm) Plastic QFN
Consult LTC Marketing for parts specified 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 specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications 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.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
PowerPath Switching Regulator
V_BUS
I_BUSLIM
Input Supply Voltage
Total Input Current
I_VBUSQ
V_BUS Quiescent Current
h_CLPROG (Note 4) Ratio of Measured V_BUS Current to
CLPROG Program Current
1x Mode, V_OUT = BAT
5x Mode, V_OUT = BAT
10x Mode, V_OUT = BAT
Suspend Mode, V_OUT = BAT
1x Mode, I_OUT = 0mA
5x Mode, I_OUT = 0mA
10x Mode, I_OUT = 0mA
Suspend Mode, I_OUT = 0mA
1x Mode
5x Mode
10x Mode
Suspend Mode
4.35
5.5
V
l
87
95 100
mA
l 436
460 500
mA
l 800
860 1000
mA
l 0.31 0.38 0.50
mA
7
mA
15
mA
15
mA
0.044
mA
224
mA/mA
1133
mA/mA
2140
mA/mA
11.3
mA/mA
3556f
2