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LTC1760 Datasheet(PDF) 4 Page - Linear Technology |
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LTC1760 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 44 page  LTC1760 4 1760f The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT1 = 12V, VBAT2 = 12V, VVDDS = 3.3V, VVCC2 = 5.2V unless otherwise noted. ELECTRICAL CHARACTERISTICS VSTEP VDAC Granularity 16 mV VLIMIT Charging Voltage Limit RVLIMIT = 0 (Short VLIMIT to GND) ● 8400 8432 8464 mV (Note 7) RVLIMIT = 10k ±1% ● 12608 12640 12672 mV RVLIMIT = 33k ±1% ● 16832 16864 16896 mV RVLIMIT = 100k ±1% ● 21024 21056 21088 mV RVLIMIT = Open (or Short VLIMIT to VCC2 )(Note 13) ● 32768 mV Charge Mux Switches tONC GCH1/GCH2 Turn-On Time VGCHX – VSCHX > 3V, CLOAD = 3000pF 5 10 ms tOFFC GCH1/GCH2 Turn-Off Time VGCHX – VSCHX < 1V, from Time of 15 µs VCSN < VBATX – 30mV, CLOAD = 3000pF VCON CH Gate Clamp Voltage ILOAD = 1µA GCH1 VGCH1 – VSCH1 5 5.8 7 V GCH2 VGCH2 – VSCH2 5 5.8 7 V VCOFF CH Gate Off Voltage ILOAD =10µA GCH1 VGCH1 – VSCH1 –0.8 –0.4 0 V GCH2 VGCH2 – VSCH2 –0.8 –0.4 0 V VTOC CH Switch Reverse Turn-Off Voltage VBATX – VCSN, 5V ≤ VBATX ≤ 28V ● 520 40 mV VFC CH Switch Forward Regulation Voltage VCSN – VBATX, 5V ≤ VBATX ≤ 28V ● 15 35 60 mV GCH1/GCH2 Active Regulation: VGCHX – VSCHX = 1.5V IOC(SRC) Max Source Current –2 µA IOC(SNK) Max Sink Current 2 µA VCHMIN BATX Voltage Below Which 3.5 4.7 V Charging is Inhibited (Does Not Apply to Wake-Up Mode) PowerPath Switches tDLY Blanking Period after UVLO Trip Switches Held Off 250 ms tPPB Blanking Period after LOPWR Trip Switches in 3-Diode Mode 1 sec tONPO GB1O/GB2O/GDCO Turn-On Time VGS < –3V, from Time of Battery/DC ● 510 µs Removal, or LOPWR Indication, CLOAD = 3000pF tOFFPO GB1O/GB2O/GDCO Turn-Off Time VGS > –1V, from Time of Battery/DC ● 37 µs Removal, or LOPWR Indication, CLOAD = 3000pF VPONO Output Gate Clamp Voltage ILOAD = 1µA GB1O Highest (VBAT1 or VSCP) – VGB1O 4.75 6.25 7 V GB2O Highest (VBAT2 or VSCP) – VGB2O 4.75 6.25 7 V GDCO Highest (VDCIN or VSCP) – VGDCO 4.75 6.25 7 V VPOFFO Output Gate Off Voltage ILOAD = –25µA GB1O Highest (VBAT1 or VSCP) – VGB1O 0.18 0.25 V GB2O Highest (VBAT2 or VSCP) – VGB2O 0.18 0.25 V GDCO Highest (VDCIN or VSCP) – VGDCO 0.18 0.25 V VTOP PowerPath Switch Reverse VSCP – VBATX or VSCP – VDCIN ● 520 60 mV Turn-Off Voltage 6V ≤ VSCP ≤ 28V VFP PowerPath Switch Forward VBATX – VSCP or VDCIN – VSCP ● 025 50 mV Regulation Voltage 6V ≤ VSCP ≤ 28V GDCI/GB1I/GB2I Active Regulation: (Note 3) IOP(SRC) Source Current –4 µA IOP(SNK) Sink Current 75 µA SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS |
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