LTC3553-2_15 Datasheet, PDF (2/36 Pages) Linear Technology – Micropower USB Power Manager with Li-Ion Charger, Always-On LDO and Buck Regulator

LTC3553-2
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3)
V_BUS, V_OUT
t < 1ms and Duty Cycle < 1% .................. –0.3V to 7V
Steady State............................................. –0.3V to 6V
BAT, NTC, CHRG, SUSP, PBSTAT,
ON, BUCK_FB, LDO_FB................................ –0.3V to 6V
BUCK_ON, STBY, HPWR, PGOOD, BVIN, V_INLDO,
LDO (Note 4)....................................–0.3V to V_CC + 0.3V
I_BAT .............................................................................1A
I_SW (Continuous) .................................................300mA
I_LDO (Continuous) ................................................175mA
I_CHRG, I_PBSTAT, I_PGOOD ............................................75mA
Operating Temperature Range.................. –40°C to 85°C
Junction Temperature ........................................... 110°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
HPWR
PGOOD
PBSTAT
ON
20 19 18 17 16
1
15 NTC
2
14 CHRG
3
21
GND
13 SW
4
12 BVIN
GND 5
11 V_INLDO
6 7 8 9 10
UD PACKAGE
20-LEAD (3mm × 3mm) PLASTIC QFN
T_JMAX = 110°C, θ_JA = 58.7°C/W
EXPOSED PAD (PIN 21) IS GND, AND MUST BE SOLDERED TO PCB GND
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3553EUD-2#PBF
LTC3553EUD-2#TRPBF LGFJ
20-Lead (3mm × 3mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
LTC3553 Options
PART NUMBER
LTC3553
LTC3553-2
LDO
ON/OFF Control
Always On
PGOOD
No
Yes
HARD RESET TIME
5 seconds
14 seconds
TEMPERATURE RANGE
–40°C to 85°C
POWER MANAGER ELECTRICAL CHARACTERISTICS
The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C (Note 2),
V_BUS = 5V, V_BAT = 3.8V, HPWR = SUSP = BUCK_ON = 0V, R_PROG = 1.87k, STBY = high, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
No-Load Quiescent Currents
I_BATQ
I_BATQC
Battery Drain Current (Note 5)
Buck and LDO Shutdown, Hard Reset
Buck and LDO Enabled
LDO Enabled, Buck Shutdown
Battery Drain Current, V_BUS Available
I_OUT = I_SW = I_LDO = 0
V_BUS = 0V, Hard Reset
V_BUS = 0V, BUCK_ON = STBY = 3.8V
V_BUS = 0V, BUCK_ON = 0V
V_BAT = V_FLOAT, Timer Timed Out
0.2
2
μA
8
16
μA
8
16
μA
5
8
μA
I_BUSQ
V_BUS Input Current
100mA, 500mA Modes
Charger On
Timer Timed Out
SUSP = 5V (Suspend Mode)
300
500
μA
150
350
μA
15
30
μA
35532f
2