LTC3107
3
3107f
For more information www.linear.com/LTC3107
elecTrical characTerisTics
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: The LTC3107 is tested under pulsed load conditions such that T
J
≈
T
A
. The LTC3107E 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 LTC3107I is
guaranteed over the full –40°C to 125°C operating junction temperature
range. 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 other environmental factors. The junction temperature (T
J
)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Harvester Start-Up Voltage Using 1:100 Transformer Turns Ratio 20 30 mV
Harvester No-Load Input Current Using 1:100 Transformer Turns Ratio, V
IN
= 20mV,
All Outputs Charged and in Regulation
3 5 mA
Harvester Input Voltage Range Using 1:100 Transformer Turns Ratio
l
V
STARTUP
500 mV
V
BAT
Voltage Range
l
2.0 4.0 V
V
BAT
Current Limit V
OUT
= 0V, VAUX = 0V (Battery Insertion)
l
2 30 60 mA
V
OUT
= (V
BAT
– 0.4V)
l
30 70 100 mA
V
BAT
Quiescent Current VAUX > V
BAT
(Harvesting)
VAUX < V
BAT
(Not Harvesting)
80
6
110
7.5
nA
µA
V
BAT
Reverse Current VAUX = 4V, V
BAT
= 2.0V 0 nA
V
OUT
Voltage (Average) VAUX > V
BAT
(Harvesting), Relative to V
BAT
C
OUT
≥ 47µF
VAUX < V
BAT
(Not Harvesting), Relative to V
BAT
C
OUT
≥ 47µF
l
l
–70
–270
–30
–220
–15
–140
mV
mV
LDO Output Voltage 0.5mA Load
l
2.134 2.2 2.266 V
LDO Load Regulation I
VLDO
= 0mA to 2mA 0.8 1.5 %
LDO Line Regulation For V
OUT
from 2.5V to 4V 0.1 0.2 %
LDO Dropout Voltage I
VLDO
= 2mA
l
100 200 mV
LDO Current Limit VLDO = 0V
l
10 20 40 mA
VAUX/VSTORE Clamp Voltage Current Into VAUX = 1mA
l
4.13 4.3 4.48 V
V
OUT
Quiescent Current VAUX > V
OUT
> V
BAT
10 100 nA
VSTORE Leakage Current VSTORE = 4V, VAUX > VSTORE 10 100 nA
VSTORE to V
OUT
Discharge Path Resistance VSTORE = 4V
V
OUT
< V
BAT
–60mV
120 200 Ω
BAT_OFF Threshold (Falling) Measured on V
OUT
Relative to V
BAT
–280 –230 –180 mV
BAT_OFF Threshold (Rising) Measured on V
OUT
Relative to V
BAT
–60 –30 –15 mV
BAT_OFF V
OL
Sink Current = 100µA 0.15 0.2 V
BAT_OFF V
OH
Source Current = 0 V
OUT
V
BAT_OFF Pull-Up Resistance 0.6 1 1.4 MΩ
N-Channel MOSFET On-Resistance C2 = 5V (Note 3) 0.5 Ω
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). VAUX = 4V, V
BAT
= 3.6V unless otherwise noted.
is calculated from the ambient temperature (T
A
) and power dissipation
(P
D
) according to the formula: T
J
= T
A
+ (P
D
• θ
JA
°C/W), where θ
JA
is the
package thermal impedance.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
43°C/W.
Note 5: The Absolute Maximum Rating is a DC rating. Under certain
conditions in the applications shown, the peak AC voltage on the C1 and
C2 pins may exceed their Absolute Maximum Rating. This behavior is
normal and acceptable because the current into the pin
is limited by the
impedance of the coupling capacitor.
