LTC3553_15 Datasheet, PDF (2/36 Pages) Linear Technology – Micropower USB Power Manager With Li-Ion Charger, LDO and Buck Regulator

LTC3553
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, LDO_ON, STBY, SEQ, HPWR,
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..........................................................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
20 19 18 17 16
HPWR 1
15 NTC
SEQ 2
14 CHRG
PBSTAT 3
21
GND
13 SW
ON 4
12 BVIN
LDO_ON 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#PBF
LTC3553EUD#TRPBF LFYB
20-Lead (3mm × 3mm) Plastic QFN
LTC3553EPD#PBF
LTC3553EPD#TRPBF FHST
20-Lead (3mm × 3mm) Plastic UTQFN
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/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C (OBSOLETE)
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 = LDO_ON = 0V, R_PROG = 1.87k, STBY = high, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
No-Load Quiescent Currents
I_BATQ
Battery Drain Current (Note 5)
Buck and LDO Shutdown, Hard Reset
Buck and LDO Shutdown
Buck and LDO Enabled, Standby Mode
Buck and LDO Enabled
Buck Enabled, LDO Shutdown
LDO Enabled, Buck Shutdown
I_OUT = I_SW = I_LDO = 0
V_BUS = 0V, Hard Reset
V_BUS = 0V
V_BUS = 0V, BUCK_ON = LDO_ON = STBY = 3.8V
V_BUS = 0V, BUCK_ON = LDO_ON = 3.8V,
STBY = 0V
V_BUS = 0V, BUCK_ON = 3.8V, LDO_ON = 0V
STBY = 0V
V_BUS = 0V, LDO_ON = 3.8V, BUCK_ON = 0V,
STBY = 0V
0.2
2
µA
3
5
µA
8
16
µA
16
35
µA
6.5
15
µA
16
35
µA
I_BATQC
Battery Drain Current, V_BUS Available
V_BAT = V_FLOAT, Timer Timed Out
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
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