Datasheet

LTC3577/LTC3577-1
10
3577fa
TYPICAL PERFORMANCE CHARACTERISTICS
Input Supply Current
vs Temperature
Input Supply Current
vs Temperature (Suspend Mode)
Battery Drain Current
vs Temperature
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3577E/LTC3577E-1 are guaranteed to meet performance
specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: This IC includes over temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when over temperature protection is
active. Continuous operation above the specifi ed maximum operating
junction temperature may result in device degradation or failure.
Note 4: V
CC
is the greater of V
BUS
, V
OUT
or BAT.
Note 5: Total input current is the sum of quiescent current, I
BUSQ
, and
measured current given by V
CLPROG
/R
CLPROG
• (h
CLPROG
+ 1).
Note 6: h
C/10
is expressed as a fraction of measured full charge current
with indicated PROG resistor.
Note 7: The current limit features of this part are intended to protect the
IC from short term or intermittent fault conditions. Continuous operation
above the specifi ed maximum pin current rating may result in device
degradation or failure.
Note 8: The serial port is tested at rated operating frequency. Timing
parameters are tested and/or guaranteed by design.
Note 9: V
OUT
not in UVLO.
Note 10: FB high, not switching.
Note 11: Measured with the LDO running unity gain with output tied to
feedback pin.
Note 12: Dropout voltage is the minimum input to output voltage
differential needed for an LDO to maintain regulation at a specifi ed output
current. When an LDO is in dropout, its output voltage will be equal to
V
IN
– V
DROP
.
Note 13: PG_DCDC threshold is expressed as a percentage difference from
the Buck1-3 regulation voltages. The threshold is measured from Buck1-3
output rising.
Note 14: I
VOUT_LED
is the sum of V
OUT
and V
IN3
current due to LED driver.
Note 15: The I
BATQ
specifi cations represent the total battery load assuming
V
INLDO1
, V
INLDO2
, V
IN12
and V
IN3
are tied directly to V
OUT
.
Note 16: Long-term current density rating for the part.
T
A
= 25°C unless otherwise specifi ed
TEMPERATURE (°C)
–50
I
VBUS
(mA)
0.7
25
3577 G01
0.4
0.2
–25 0 50
0.1
0
0.8
0.6
0.5
0.3
75 100 125
V
BUS
= 5V
1x MODE
TEMPERATURE (°C)
–50 –25
0
I
VBUS
(mA)
0.04
0.10
0
50
75
3577 G02
0.02
0.08
0.06
25
100
125
V
BUS
= 5V
TEMPERATURE (°C)
–50
0
I
BAT
(µA)
50
150
200
250
400
350
0
50
75
3577 G03
100
300
–25
25
100
125
PON STATE
Burst Mode OPERATION
NO LOAD ON SUPPLIES, LDOS AND LED
BOOST DISABLED. V
BAT
= 3.8V,
V
BUS
= 0V
POFF STATE
PON STATE
PULSE-SKIPPING MODE
HARD RESET STATE