LTC1980 Просмотр технического описания (PDF) - Linear Technology
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LTC1980 Datasheet PDF : 16 Pages
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LTC1980
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBAT = 2.4V, VREG = 5V, VBAT unloaded.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
VRCHG2
Recharge Threshold, Delta Voltage with Respect
to Float Voltage, Measured at OVP
BATT 1 = Open
60
mV
VLT0
VLT1
IBLDO
gmldo
VOLLDO
VOHLDO
IOUTLDO
AVOL
IBEA
VOLEA
VOHEA
IOUT
Charger Shorted Cell Threshold
Charger Shorted Cell Threshold
Input Bias Current, Low Dropout Regulator
Transconductance, Low Dropout Regulator
Output Low Voltage, Low Dropout Regulator
Output High Voltage, Low Dropout Regulator
Low Dropout Regulator Output Current, Source/Sink
Error Amplifier Open-Loop Voltage Gain
Error Amplifier Input Bias Current
Error Amplifier Output Low Voltage
Error Amplifier Output High Voltage
Error Amplifier Output Source Current
Error Amplifier Output Sink Current
BATT2 = 0
BATT2 = 1
Measured at LDOFB Pin
Measured from LDOFB to LDODRV
From REGFB to VC
SS = Open
2.55 2.7 2.8
5.2 5.4 5.65
1.0
350
0.1
VREG – 0.1
±20
60
– 0.1
0.1
0
0.5
1.4
2
0.5
–1.2
V
V
µA
µmhos
V
V
µA
dB
µA
V
V
mA
mA
gmflt
Float Voltage Error Amplifier Transconductance
Measured from OVP to SS,
Charger Mode, BATT1 = Open
65
µmhos
IBFLT
Float Voltage Error Amplifier Input Current
(Measured at OVP Input)
– 0.1
0.1
µA
VOS1
Current Amplifier Offset Voltage
IBIS
Input Bias Current, ISENSE Input
AVCA
Current Amplifier Voltage Gain
Measured from ISENSE to
CAOUT Pin
–6
6
mV
–100
µA
2.3 2.44 2.55
V/V
RPROG
IPROG
fS
tr, tf
tBREAK
fTIMER
ITIMER1
ITIMER2
RREG
IREGPD
IREGLK
VVTHREG
VIL1
PROG Pin On Resistance
PROG Pin Leakage Current
Switching Frequency
Driver Output Transition Times
Driver Output Break Times
Timer Frequency
TIMER Pin Source Current
TIMER Pin Sink Current
REG On Resistance
REG Pull-Down Current
REG Leakage Current
REG Logic Threshold
Digital Input Low Voltage,
Negative-Going, Wall Adapter (WA)
CL = 15pF
VBAT = VREG = 10V
C = 1000pF
VREG = 5V
400
Ω
100
nA
● 260 300 340
kHz
10
ns
100
ns
4.5
kHz
–4
µA
4
µA
68
Ω
2
5
9
µA
60
nA
0.3
1.3
V
1.185 1.221 1.247
V
VIH1
Digital Input High Voltage,
Positive-Going, Wall Adapter (WA)
VREG = 5V
1.195 1.226 1.257
V
VIL2
Digital Input Low Voltage, BATT1
VIH2
Digital Input High Voltage, BATT1
VBIAS2
–100
100
mV
V
1980f
3
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