Datasheet LTC1980 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Combination Battery Charger and DC/DC Converter |
| Pages / Page | 16 / 3 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 245 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating
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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 BATT 1 = Open 60 mV to Float Voltage, Measured at OVP VLT0 Charger Shorted Cell Threshold BATT2 = 0 2.55 2.7 2.8 V VLT1 Charger Shorted Cell Threshold BATT2 = 1 5.2 5.4 5.65 V IBLDO Input Bias Current, Low Dropout Regulator Measured at LDOFB Pin 1.0 µA gmldo Transconductance, Low Dropout Regulator Measured from LDOFB to LDODRV 350 µmhos VOLLDO Output Low Voltage, Low Dropout Regulator 0.1 V VOHLDO Output High Voltage, Low Dropout Regulator VREG – 0.1 V IOUTLDO Low Dropout Regulator Output Current, Source/Sink ±20 µA AVOL Error Amplifier Open-Loop Voltage Gain From REGFB to VC 60 dB IBEA Error Amplifier Input Bias Current –0.1 0.1 µA VOLEA Error Amplifier Output Low Voltage 0 0.5 V VOHEA Error Amplifier Output High Voltage SS = Open 1.4 2 V IOUT Error Amplifier Output Source Current 0.5 mA Error Amplifier Output Sink Current –1.2 mA gmflt Float Voltage Error Amplifier Transconductance Measured from OVP to SS, 65 µmhos Charger Mode, BATT1 = Open IBFLT Float Voltage Error Amplifier Input Current –0.1 0.1 µA (Measured at OVP Input) VOS1 Current Amplifier Offset Voltage –6 6 mV IBIS Input Bias Current, ISENSE Input –100 µA AVCA Current Amplifier Voltage Gain Measured from ISENSE to 2.3 2.44 2.55 V/V CAOUT Pin RPROG PROG Pin On Resistance 400 Ω IPROG PROG Pin Leakage Current 100 nA fS Switching Frequency ● 260 300 340 kHz tr, tf Driver Output Transition Times CL = 15pF 10 ns tBREAK Driver Output Break Times VBAT = VREG = 10V 100 ns fTIMER Timer Frequency C = 1000pF 4.5 kHz ITIMER1 TIMER Pin Source Current –4 µA ITIMER2 TIMER Pin Sink Current 4 µA RREG REG On Resistance 68 Ω IREGPD REG Pull-Down Current 2 5 9 µA IREGLK REG Leakage Current 60 nA VVTHREG REG Logic Threshold 0.3 1.3 V VIL1 Digital Input Low Voltage, VREG = 5V 1.185 1.221 1.247 V Negative-Going, Wall Adapter (WA) VIH1 Digital Input High Voltage, VREG = 5V 1.195 1.226 1.257 V Positive-Going, Wall Adapter (WA) VIL2 Digital Input Low Voltage, BATT1 100 mV VIH2 Digital Input High Voltage, BATT1 VBIAS2 V –100 1980f 3
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 BATT 1 = Open 60 mV to Float Voltage, Measured at OVP VLT0 Charger Shorted Cell Threshold BATT2 = 0 2.55 2.7 2.8 V VLT1 Charger Shorted Cell Threshold BATT2 = 1 5.2 5.4 5.65 V IBLDO Input Bias Current, Low Dropout Regulator Measured at LDOFB Pin 1.0 µA gmldo Transconductance, Low Dropout Regulator Measured from LDOFB to LDODRV 350 µmhos VOLLDO Output Low Voltage, Low Dropout Regulator 0.1 V VOHLDO Output High Voltage, Low Dropout Regulator VREG – 0.1 V IOUTLDO Low Dropout Regulator Output Current, Source/Sink ±20 µA AVOL Error Amplifier Open-Loop Voltage Gain From REGFB to VC 60 dB IBEA Error Amplifier Input Bias Current –0.1 0.1 µA VOLEA Error Amplifier Output Low Voltage 0 0.5 V VOHEA Error Amplifier Output High Voltage SS = Open 1.4 2 V IOUT Error Amplifier Output Source Current 0.5 mA Error Amplifier Output Sink Current –1.2 mA gmflt Float Voltage Error Amplifier Transconductance Measured from OVP to SS, 65 µmhos Charger Mode, BATT1 = Open IBFLT Float Voltage Error Amplifier Input Current –0.1 0.1 µA (Measured at OVP Input) VOS1 Current Amplifier Offset Voltage –6 6 mV IBIS Input Bias Current, ISENSE Input –100 µA AVCA Current Amplifier Voltage Gain Measured from ISENSE to 2.3 2.44 2.55 V/V CAOUT Pin RPROG PROG Pin On Resistance 400 Ω IPROG PROG Pin Leakage Current 100 nA fS Switching Frequency ● 260 300 340 kHz tr, tf Driver Output Transition Times CL = 15pF 10 ns tBREAK Driver Output Break Times VBAT = VREG = 10V 100 ns fTIMER Timer Frequency C = 1000pF 4.5 kHz ITIMER1 TIMER Pin Source Current –4 µA ITIMER2 TIMER Pin Sink Current 4 µA RREG REG On Resistance 68 Ω IREGPD REG Pull-Down Current 2 5 9 µA IREGLK REG Leakage Current 60 nA VVTHREG REG Logic Threshold 0.3 1.3 V VIL1 Digital Input Low Voltage, VREG = 5V 1.185 1.221 1.247 V Negative-Going, Wall Adapter (WA) VIH1 Digital Input High Voltage, VREG = 5V 1.195 1.226 1.257 V Positive-Going, Wall Adapter (WA) VIL2 Digital Input Low Voltage, BATT1 100 mV VIH2 Digital Input High Voltage, BATT1 VBIAS2 V –100 1980f 3
