LTC3559-1_15 Datasheet, PDF (3/24 Pages) Linear Technology – Linear USB Battery Charger with Dual Buck Regulators

LTC3559/LTC3559-1
ELECTRICAL CHARACTERISTICS The l denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
ΔV_DUVLO Differential Undervoltage Lockout
Hysteresis
BAT = 4.05V (LTC3559)
BAT = 3.95V (LTC3559-1)
130
mV
130
mV
V_PROG
h_PROG
I_TRKL
V_TRKL
ΔV_TRKL
ΔV_RECHRG
t_RECHRG
t_TERM
t_BADBAT
h_C/10
t_C/10
R_ON(CHG)
T_LIM
PROG Pin Servo Voltage
Ratio of I_BAT to PROG Pin Current
Trickle Charge Current
Trickle Charge Threshold Voltage
HPWR = 5V
HPWR = 0V
BAT < V_TRKL
BAT < V_TRKL
BAT Rising
Trickle Charge Hysteresis Voltage
Recharge Battery Threshold Voltage
Recharge Comparator Filter Time
Threshold Voltage Relative to V_FLOAT
BAT Falling
Safety Timer Termination Period
Bad Battery Termination Time
End-of-Charge Indication Current Ratio
BAT = V_FLOAT
BAT < V_TRKL
(Note 5)
End-of-Charge Comparator Filter Time I_BAT Falling
Battery Charger Power FET On-Resistance I_BAT = 190mA
(Between V_CC and BAT)
Junction Temperature in Constant
Temperature Mode
1.000
V
0.200
V
0.100
V
800
mA/mA
36
46
56
mA
2.8 2.9 3.0
V
100
mV
–85 –100 –130
mV
1.7
ms
3.5
4
4.5
Hour
0.4 0.5 0.6
Hour
0.085 0.1 0.11 mA/mA
2.2
ms
500
mΩ
105
°C
NTC
V_COLD
V_HOT
V_DIS
Cold Temperature Fault Threshold Voltage Rising NTC Voltage
Hysteresis
Hot Temperature Fault Threshold Voltage Falling NTC Voltage
Hysteresis
NTC Disable Threshold Voltage
Falling NTC Voltage
Hysteresis
75 76.5 78
1.6
33.4 34.9 36.4
1.6
l 0.7 1.7 2.7
50
%V_CC
%V_CC
%V_CC
%V_CC
%V_CC
mV
I_NTC
NTC Leakage Current
Logic (HPWR, SUSP, CHRG)
V_NTC = V_CC = 5V
–1
1
μA
V_IL
V_IH
R_DN
V_CHRG
I_CHRG
Input Low Voltage
Input High Voltage
Logic Pin Pull-Down Resistance
CHRG Pin Output Low Voltage
CHRG Pin Input Current
HPWR, SUSP Pins
HPWR, SUSP Pins
HPWR, SUSP Pins
I_CHRG = 5mA
BAT = 4.5V, V_CHRG = 5V
0.4
V
1.2
V
l 1.9
4
6.3
MΩ
100 250
mV
0
1
μA
Buck Switching Regulators, BAT = PV_IN = 3.8V, EN1 = EN2 = 3.8V
PV_IN
Input Supply Voltage
LTC3559
LTC3559-1
l3
l3
4.2
V
4.1
V
I_PVIN
PV_IN UVLO
f_OSC
V_IL
V_IH
I_LIMSW
Pulse Skip Supply Current
Burst Mode Supply Current
Shutdown Supply Current
Supply Current in UVLO
PV_IN Falling
PV_IN Rising
Switching Frequency
Input Low Voltage
Input High Voltage
Peak PMOS Current Limit
MODE = 0 (One Buck Enabled) (Note 6)
MODE = 1 (One Buck Enabled) (Note 6)
EN1 = EN2 = 0V
PV_IN = 2.0V
MODE = 0V
MODE, EN1, EN2
MODE, EN1, EN2
MODE = 0V or 3.8V
220 400
μA
35
50
μA
l
0
2
μA
4
8
μA
2.45
V
2.55
V
1.91 2.25 2.59
MHz
0.4
V
1.2
V
550 800 1050
mA
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