LTC1734 データシートの表示（PDF） - Linear Technology
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LTC1734 Datasheet PDF : 12 Pages
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LTC1734
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, GND = 0V and VBAT is equal to the float voltage unless
otherwise noted. All current into a pin is positive and current out of a pin is negative. All voltages are referenced to GND, unless
otherwise specified.
SYMBOL PARAMETER
Charger Manual Control
VMSDT Manual Shutdown Threshold
VMSHYS Manual Shutdown Hysteresis
IPROGPU Programming Pin Pull-Up Current
Protection
IDSHRT Drive Output Short-Circuit Current Limit
CONDITIONS
VPROG Increasing
VPROG Decreasing from VMSDT
VPROG = 2.5V
VDRIVE = VCC
MIN TYP MAX UNITS
q 2.05 2.15 2.25
V
90
mV
– 6 – 3 – 1.5
µA
q 35 65 130
mA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1734E is guaranteed to meet performance specifications
from 0°C to 70°C ambient temperature range and 0°C to 100°C junction
temperature range. Specifications over the – 40°C to 85°C operating
ambient temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: Assumes that the external PNP pass transistor has negligible B-C
reverse-leakage current when the collector is biased at 4.2V (VBAT) and the
base is biased at 5V (VCC).
Note 4: Assumes that the external PNP pass transistor has negligible B-E
reverse-leakage current when the emitter is biased at 0V (VCC) and the
base is biased at 4.2V (VBAT).
Note 5: The 4.68V maximum undervoltage lockout (UVLO) exit threshold
must first be exceeded before the minimum VCC specification applies.
Short duration drops below the minimum VCC specification of several
microseconds or less are ignored by the UVLO. If manual shutdown is
entered, then VCC must be higher than the 4.68V maximum UVLO
threshold before manual shutdown can be exited. When operating near the
minimum VCC, a suitable PNP transistor with a low saturation voltage
must be used.
TYPICAL PERFOR A CE CHARACTERISTICS
Float Voltage vs Temperature
and Supply Voltage
4.21
IBAT = 10mA
PNP = FCX589
4.2V OPTION
4.20
VCC = 8V
VCC = 4.55V
Float Voltage vs IBAT
4.201
VCC = 5V
TA = 25°C
PNP = FCX589
4.2V OPTION
RPROG = 2150Ω
4.200
IBAT1 vs Temperature
and Supply Voltage
210
RPROG = 7.5k
PNP = FCX589
200
VCC = 4.55V AND 8V
4.19
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1734 G01
4.199
0
100 200 300 400 500 600 700
IBAT (mA)
1734 G02
190
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1734 G03
3
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