LTC3555 Linear Technology, LTC3555 Datasheet - Page 3

• Manufacturer Part Number: LTC3555
• Description: High Efficiency USB Power Manager + Triple Step-Down DC/DC
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
SYMBOL
V
V
V
V
f
R
R
I
Battery Charger
V
I
I
V
V
V
h
I
V
ΔV
ΔV
t
t
h
V
I
R
T
temperature range, otherwise specifi cations are at T
unless otherwise noted.
OSC
PEAK_POWERPATH
CHG
BAT
TRKL
TERM
BADBAT
⎯ C ⎯ H ⎯ R ⎯ G
PROG
C/10
LIM
CLPROG
UVLO_VBUS
UVLO_VBUS-BAT
OUT
FLOAT
PROG
PROG_TRKL
C/10
TRKL
⎯ C ⎯ H ⎯ R ⎯ G
PMOS_POWERPATH
NMOS_POWERPATH
ON_CHG
TRKL
RECHRG
PARAMETER
CLPROG Servo Voltage in Current
Limit
V
V
Lockout
V
Switching Frequency
PMOS On Resistance
NMOS On Resistance
Peak Switch Current Limit
BAT Regulated Output Voltage
Constant Current Mode Charge
Current
Battery Drain Current
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle
Charge
C/10 Threshold Voltage at PROG
Ratio of I
Trickle Charge Current
Trickle Charge Threshold Voltage
Trickle Charge Hysteresis Voltage
Recharge Battery Threshold Voltage
Safety Timer Termination
Bad Battery Termination Time
End of Charge Indication Currrent
Ratio
⎯ C ⎯ H ⎯ R ⎯ G Pin Output Low Voltage
⎯ C ⎯ H ⎯ R ⎯ G Pin Leakage Current
Battery Charger Power FET On
Resistance (Between V
Junction Temperature in Constant
Temperature Mode
BUS
BUS
OUT
Undervoltage Lockout
to BAT Differential Undervoltage
Voltage
BAT
to PROG Pin Current
OUT
and BAT)
A
CONDITIONS
1x, 5x, 10x Modes
Suspend Mode
Rising Threshold
Falling Threshold
Rising Threshold
Falling Threshold
1x, 5x, 10x Modes, 0V < BAT < 4.2V,
I
USB Suspend Mode, I
1x, 5x Modes
10x
R
R
V
V
BAT < V
BAT < V
BAT Rising
Threshold Voltage Relative to V
Timer Starts when B
BAT < V
(Note 5)
I
V
OUT
⎯ C ⎯ H ⎯ R ⎯ G
BUS
BUS
⎯ C ⎯ H ⎯ R ⎯ G
PROG
PROG
= 25°C. V
= 0mA, Battery Charger Off
> V
= 0V, I
= 5mA
= 5V
= 1k
= 5k
The
TRKL
TRKL
TRKL
UVLO
OUT
●
BUS
, Battery Charger Off, I
denotes the specifi cations which apply over the full operating
= 0μA (Ideal Diode Mode)
= 5V, BAT = 3.8V, DV
AT
OUT
= V
= 250μA
FLOAT
FLOAT
OUT
= 0μA
CC
= 3.3V, R
●
PROG
4.179
4.165
0.088
3.95
0.42
MIN
980
185
–75
3.4
4.5
1.8
2.7
3.3
2
= 1k, R
BAT + 0.3
1.188
4.200
4.200
1.000
0.100
1022
1022
–100
4.30
4.00
2.25
0.18
0.30
2.85
0.18
TYP
100
200
204
100
100
135
110
4.6
3.5
0.5
0.1
50
27
65
CLPROG
2
3
4
LTC3555
= 3k,
4.221
4.235
0.112
1065
–125
MAX
4.35
0.63
223
100
4.7
4.7
2.7
3.0
38
5
5
1
mA/mA
mA/mA
UNITS
3
Hour
Hour
MHz
3555f
mV
mV
mV
mA
mA
mV
mA
mV
mV
mV
μA
μA
μA
°C
Ω
Ω
Ω
V
V
V
V
V
A
A
V
V
V
V
V