LTC3331_15 Datasheet, PDF (5/34 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Charger

LTC3331
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 2). V_IN = 5V, BAT_IN = BAT_OUT = BB_IN = 3.6V,
SHIP = OV, SCAP = 0V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
PMOS Switch Leakage
Buck/Buck-Boost Regulators
–20
20
nA
NMOS Switch Leakage
Buck/Buck-Boost Regulators
–20
20
nA
Maximum Buck Duty Cycle
Buck/Buck-Boost Regulators
l 100
%
I_{PEAK_BUCK} Buck Peak Switch Current
Available Buck Output Current
200
250
500
mA
100
mA
Buck PMOS Switch On-Resistance
1.4
Ω
Buck NMOS Switch On-Resistance
1.2
Ω
Maximum Battery Shunt Current
10
mA
I_{BAT_IN}
Battery Disconnect Leakage Current Battery Disconnected
SHIP Mode Engaged
–10
0
10
nA
–10
0
10
nA
V_FLOAT
Shunt Charger Float Voltage
(BAT_OUT Voltage)
FLOAT[1:0] = 00, I_{BB_IN} = 1mA
FLOAT[1:0] = 01, I_{BB_IN} = 1mA
FLOAT[1:0] = 10, I_{BB_IN} = 1mA
FLOAT[1:0] = 11, I_{BB_IN} = 1mA
FLOAT[1:0] = 00, I_{BB_IN} = 1mA
FLOAT[1:0] = 01, I_{BB_IN} = 1mA
FLOAT[1:0] = 10, I_{BB_IN} = 1mA
FLOAT[1:0] = 11, I_{BB_IN} = 1mA
3.415 3.45 3.485
V
3.960 4.0 4.040
V
4.059 4.1 4.141
V
4.158 4.2 4.242
V
l 3.381 3.45 3.519
V
l 3.920 4.0 4.080
V
l 4.018 4.1 4.182
V
l 4.116 4.2 4.284
V
V_LBD
Low Battery Disconnect Threshold, LBSEL = 0, FLOAT[1:0] = 00, I_{BAT_IN} = –1mA
l 1.98 2.04 2.10
V
BAT_IN Voltage (Falling)
LBSEL = 1, FLOAT[1:0] = 00, I_{BAT_IN} = –1mA
l 2.43 2.51 2.59
V
LBSEL = 0, FLOAT[1:0] = 01, 10, 11, I_{BAT_IN} = –1mA l 2.62 2.70 2.78
V
LBSEL = 1, FLOAT[1:0] = 01, 10, 11, I_{BAT_IN} = –1mA l 3.10 3.20 3.30
V
V_{LBC_BAT_IN} Low Battery Connect Threshold,
LBSEL = 0, FLOAT[1:0] = 00, I_{BAT_IN} = –1mA
2.26 2.35 2.44
V
BAT_IN Voltage (Rising)
LBSEL = 1, FLOAT[1:0] = 00, I_{BAT_IN} = –1mA
2.74 2.85 2.96
V
LBSEL = 0, FLOAT[1:0] = 01, 10, 11, I_{BAT_IN} = –1mA
2.91 3.03 3.15
V
LBSEL = 1, FLOAT[1:0] = 01, 10, 11, I_{BAT_IN} = –1mA
3.39 3.53 3.67
V
V_{LBC_BAT_} Low Battery Connect Threshold,
OUT
BAT_OUT Voltage (Rising)
LBSEL = 0, FLOAT[1:0] = 00
LBSEL = 1, FLOAT[1:0] = 00
LBSEL = 0, FLOAT[1:0] = 01, 10, 11
LBSEL = 1, FLOAT[1:0] = 01, 10, 11
3.02
V
3.52
V
3.70
V
4.20
V
Battery Disconnect PMOS
On-Resistance
BAT_IN = 3.3V, I_{BAT_IN} = 10mA
5
Ω
Charge Pin Current
Current Out of CHARGE Pin
l
1
mA
2
mA
CHARGE Pin Voltage PMOS
On-Resistance
2mA Out of CHARGE Pin
60
Ω
V_SCAP
I_SCAP
Supercapacitor Balancer Input Range
Supercapacitor Balancer Quiescent SCAP = 5.0V
Current
l 2.5
5.5
V
150
225
nA
Supercapacitor Balancer Source
Current
SCAP = 5.0V, BAL = 2.4V
10
mA
Supercapacitor Balancer Sink Current SCAP = 5.0V, BAL = 2.6V
10
mA
For more information www.linear.com/LTC3331
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