LTC3226_12 Datasheet, PDF (4/16 Pages) Linear Technology – 2-Cell Supercapacitor Charger

LTC3226
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C (Note 3). V_IN = 3.3V, V_CPO = 5V, V_OUT = 3.3V, VMID = 1/2 V_CPO
unless otherwise noted.
SYMBOL PARAMETER
LDO
Minimum CPO Voltage for LDO Operation
V_{LDO_FB}
LDO FB Servo Voltage
Load Regulation ΔV_{LDO_FB}/ΔI_OUT
LDO FET R_DS(ON)
I_{LDO_FB(LEAK)} LDO_FB Input Leakage Current
I_LIM
LDO Current Limit
RST_FB, RST
V_{RST_FB(TH)}
V_{RST_FB(HYS)}
I_{RST_FB(LEAK)}
RST_FB Threshold (Falling Edge)
RST_FB Hysteresis
RST_FB Input Leakage Current
RST Output Low Voltage
RST High Impedance Leakage Current
RST Delay (RST_FB Rising)
Power-Fail Comparator
V_PFI(TH)
V_PFI(HYS)
I_PFI(LEAK)
I_PFO(LEAK)
PFI Input Threshold (Falling Edge)
PFI input Hysteresis
PFI Input Leakage Current
PFO Output Low Voltage
PFO High Impedance Leakage Current
PFI Delay to PFO (PFI Falling)
EN_CHG
V_IH
Input High Voltage
V_IL
Input Low Voltage
I_IH
Input High Current
I_IL
Input Low Current
CONDITIONS
I_VOUT = 1mA
1mA < I_VOUT < 2A
V_CPO = 3.6V
V_{LDO_FB} = 0.9V
V_{RST_FB} = 0.9V
I_SINK = 5mA
V_RST = 5V
V_PFI = 0.5V
I_SINK = 5mA
V_PFO = 5V
MIN TYP MAX UNITS
2.4
l 0.76 0.8 0.82
2.7
200
l –60
60
2
4
V
V
mV/A
mΩ
nA
A
l 0.72 0.74 0.76
V
20
mV
l –50
50
nA
65
mV
l
1
μA
290
ms
l 1.175 1.2 1.225
V
20
mV
l –50
50
nA
65
mV
l
1
μA
0.5
μs
l 1.3
l
l –1
l –1
V
0.4
V
1
μA
1
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much greater than
58.7°C/W.
Note 3: The LTC3226 is tested under pulsed load conditions such that T_A ≈ T_J.
The LTC3226E is guaranteed to meet specifications from 0°C to 85°C
junction temperature. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3226I is guaranteed
over the full –40°C to 125°C operating junction temperature range. The
junction temperature, T_J, is calculated from the ambient temperature, T_A,
and power dissipation, P_D, according to the formula:
T_J = T_A + (P_D • 58.7°C/W)
Note that the maximum ambient temperature consistent with these
specifications is determined by specific operating conditions in
conjunction with board layout, the rated thermal package thermal
resistance and the environmental factor.
Note 4: Output not in regulation; R_OL = (2 • V_IN – V_CPO)/I_CPO.
3226fa
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