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LTC3554EPD Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3554EPD
Description  Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3554EPD Datasheet(HTML) 3 Page - Linear Technology

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LTC3554
3
3554f
POWER MANAGER ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VUVLO
VBUS Undervoltage Lockout
Rising Threshold
Falling Threshold
3.5
3.8
3.6
3.9
V
V
VDUVLO
VBUS to BAT Differential Undervoltage
Lockout
Rising Threshold
Falling Threshold
0
200
50
300
mV
mV
RON_ILIM
Input Current Limit Power FET
On-Resistance (Between VBUS and VOUT)
350
Battery Charger
VFLOAT
VBAT Regulated Output Voltage
0 ≤ TA ≤ 85°C
4.179
4.165
4.2
4.2
4.221
4.235
V
V
ICHG
Constant-Current Mode Charge Current
RPROG = 1.87k, 0 ≤ TA ≤ 85°C
380
400
420
mA
VPROG
VPROG,TRKL
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle Charge
VBAT < VTRKL
1
0.1
V
V
hPROG
Ratio of IBAT to PROG Pin Current
750
mA/mA
ITRKL
Trickle Charge Current
VBAT < VTRKL
30
40
50
mA
VTRKL
Trickle Charge Threshold Voltage
VBAT Rising
VBAT Falling
2.6
2.9
2.75
3V
V
ΔVRECHRG
Recharge Battery Threshold Voltage
Threshold Voltage Relative to VFLOAT
–75
–100
–115
mV
tTERM
Safety Timer Termination Period
Timer Starts when VBAT = VFLOAT – 50mV
3.2
4
5
Hour
tBADBAT
Bad Battery Termination Time
VBAT < VTRKL
0.4
0.5
0.63
Hour
hC/10
End-of-Charge Indication Current Ratio
(Note 6)
0.085
0.1
0.115
mA/mA
RON_CHG
Battery Charger Power FET
On-Resistance (Between VOUT and BAT)
IBAT = 200mA
220
TLIM
Junction Temperature in Constant
Temperature Mode
110
°C
NTC
VCOLD
Cold Temperature Fault Threshold
Voltage
Rising NTC Voltage
Hysteresis
75
76
1.3
77
%VBUS
%VBUS
VHOT
Hot Temperature Fault Threshold Voltage Falling NTC Voltage
Hysteresis
34
35
1.3
36
%VBUS
%VBUS
VDIS
NTC Disable Threshold Voltage
Falling NTC Voltage
Hysteresis
l
1.2
1.7
50
2.2
%VBUS
mV
INTC
NTC Leakage Current
VNTC = VBUS = 5V
–50
50
nA
Ideal Diode
VFWD
Forward Voltage Detection
(Note 12)
15
mV
RDROPOUT
Diode On-Resistance, Dropout
IOUT = 200mA, VBUS = 0V
240
IMAX
Diode Current Limit
(Note 7)
1
A
Logic Inputs (HPWR, SUSP)
VIL
Input Low Voltage
0.4
V
VIH
Input High Voltage
1.2
V
RPD
Internal Pull-Down Resistance
4
Logic Output (CHRG)
VOL
Output Low Voltage
ICHRG = 5mA
65
250
mV
ICHRG
Output Hi-Z Leakage Current
VBAT = 4.5V, VCHRG = 5V
0
1
μA
The
l denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C,
VBUS = 5V, VBAT = 3.8V, HPWR = SUSP = PWR_ON1 = PWR_ON2 = 0V, RPROG = 1.87k, STBY = High, unless otherwise noted.


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