LTC4008 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT = 12V unless otherwise noted.SYMBOL PARAMETERCONDITIONSMINTYPMAXUNITS DCIN Operating Range 6 28 V IQ Operating Current Charging Sum of Current from CLP, CLN, DCIN 3 5 mA VTOL Voltage Accuracy (Notes 2, 5) –0.8 0.8 % l –1.0 1.0 % BATMON Error (Note 5) Measured from BAT to BATMON, 0 35 80 mV RLOAD = 100k ITOL Charge Current Accuracy (Note 3) VCSP – VBAT Target = 100mV –4 4 % l –5 5 % Shutdown Battery Leakage Current DCIN = 0V (LTC4008 Only) l 20 35 µA ACP/SHDN = 0V l –10 10 µA UVLO Undervoltage Lockout Threshold DCIN Rising, VBAT = 0V l 4.2 4.7 5.5 V Shutdown Threshold at ACP/SHDN l 1 1.6 2.5 V Operating Current in Shutdown VSHDN = 0V, Sum of Current from CLP, 2 3 mA CLN, DCIN Current Sense Amplifier, CA1 Input Bias Current Into BAT Pin 11.66 µA CMSL CA1/I1 Input Common Mode Low l 0 V CMSH CA1/I1 Input Common Mode High VDCIN ≤ 28V l VCLN – 0.2 V VOS Input Voltage Offset –3.5 3.5 mV Current Comparators ICMP and IREV ITMAX Maximum Current Sense Threshold (VCSP – VBAT) VITH = 2.5V l 140 165 200 mV ITREV Reverse Current Threshold (VCSP – VBAT) –30 mV Current Sense Amplifier, CA2 Transconductance 1 mmho Source Current Measured at ITH, VITH = 1.4V –40 µA Sink Current Measured at ITH, VITH = 1.4V 40 µA Current Limit Amplifier Transconductance 1.4 mmho VCLP Current Limit Threshold l 93 100 107 mV ICLN CLN Input Bias Current 100 nA Voltage Error Amplifier, EA Transconductance 1 mmho VREF Reference Voltage Used to Calculate VFLOAT 1.19 V IBEA Input Bias Current ±4 ±25 nA Sink Current Measured at ITH, VITH = 1.4V 36 µA OVSD Overvoltage Shutdown Threshold as a Percent of l 102 107 110 % Programmed Charger Voltage Rev C For more information www.analog.com 3 Document Outline Description Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Operation Applications Information Package Description Revision History Related Parts
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