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LTC3577 Datasheet, PDF (10/52 Pages) Linear Technology – Highly Integrated 6-Channel Portable PMIC | |||
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LTC3577/LTC3577-1
ELECTRICAL CHARACTERISTICS
Note 4: VCC is the greater of VBUS, VOUT or BAT.
Note 5: Total input current is the sum of quiescent current, IBUSQ, and
measured current given by VCLPROG/RCLPROG ⢠(hCLPROG + 1).
Note 6: hC/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 speciï¬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: VOUT 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 speciï¬ed output
current. When an LDO is in dropout, its output voltage will be equal to
VIN â VDROP.
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: IVOUT_LED is the sum of VOUT and VIN3 current due to LED driver.
Note 15: The IBATQ speciï¬cations represent the total battery load assuming
VINLDO1, VINLDO2, VIN12 and VIN3 are tied directly to VOUT.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise speciï¬ed
Input Supply Current
vs Temperature
0.8
VBUS = 5V
0.7 1x MODE
0.6
0.5
0.4
0.3
0.2
0.1
0
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3577 G01
Input Current Limit
vs Temperature
1200
1100
1000
VBUS = 5V
RCLPROG = 2.1k
10x MODE
900
800
700
600
5x MODE
500
400
300
200
100
1x MODE
0
â50 â25 0 25 50 75 100 125
TEMPERATURE (°C)
3577 G04
Input Supply Current
vs Temperature (Suspend Mode)
0.10
VBUS = 5V
0.08
0.06
0.04
0.02
0
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3577 G02
Input RON vs Temperature
300
IOUT = 400mA
280
260
240
VBUS = 4.5V
220
VBUS = 5V
180
160
VBUS = 5.5V
140
120
100
0
â50 â25
0 25 50 75 100 125
TEMPERATURE (°C)
3577 G05
10
Battery Drain Current
vs Temperature
400
NO LOAD ON SUPPLIES, LDOS AND LED
350 BOOST DISABLED. VBAT = 3.8V,
VBUS = 0V
PON STATE
300
PULSE-SKIPPING MODE
250
200
150
100
50
0
â50 â25
PON STATE
Burst Mode OPERATION
POFF STATE
HARD RESET STATE
0 25 50 75
TEMPERATURE (°C)
100 125
3577 G03
Charge Current vs Temperature
(Thermal Regulation)
600
500
400
300
200
100 VBUS = 5V
10x MODE
RPROG = 2k
0
â50 â25 0 25 50 75
TEMPERATURE (°C)
100 125
3577 G06
3577f
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