LTC4012-3 e lecTrical characTerisTics The l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSCharge Voltage Regulation VTOL VBAT Accuracy (See Test Circuits) –0.5 0.5 % C-Grade l –0.8 0.8 % I-Grade l –1.0 1.0 % IVFB VFB Input Bias Current VFB = 1.2V ±20 nA RON FBDIV On Resistance ILOAD = 100µA l 85 190 Ω ILEAK-FBDIV FBDIV Output Leakage Current SHDN = 0V, FBDIV = 0V l –1 0 1 µA VBOV VFB Overvoltage Threshold l 1.235 1.281 1.32 V Charge Current Regulation ITOL Charge Current Accuracy with RIN = 3.01k, RPROG = 26.7k –4 4 % 6V < BAT < 18V C-Grade l –5 5 % I-Grade l –9.5 9.5 % VSENSE = 0mV, PROG = 1.2V –12.75 –11.67 –10.95 µA AI Current Sense Amplifier Gain (PROG ∆I) with VSENSE Step from 0mV to 5mV, –1.78 –1.66 –1.54 µA RIN = 3.01k, 6V < BAT < 18V PROG = 1.2V VCS-MAX Maximum Peak Current Sense Threshold Voltage ITH = 2V, C-Grade l 140 195 250 mV per Cycle (RIN = 3.01k) ITH = 2V, I-Grade l 125 265 mV ITH = 5V l 325 430 mV VC10 C/10 Indicator Threshold Voltage PROG Falling 340 400 460 mV VREV Reverse Current Threshold Voltage PROG Falling 180 253 295 mV Input Current Regulation VCL Current Limit Threshold CLP – CLN 97 100 103 mV C-Grade l 96 100 104 mV I-Grade l 92 108 mV ICLN CLN Input Bias Current CLN = CLP ±100 nA VICL ICL Indicator Threshold (CLP – CLN) – VCL –8 –5 –2 mV CLP Supply OVR Operating Voltage Range 6 28 V VUVLO CLP Undervoltage Lockout Threshold CLP Increasing l 4.65 4.85 5.25 V VUV(HYST) UVLO Threshold Hysteresis 200 mV ICLPO CLP Operating Current CLP = 20V, No Gate Loads 2 3 mA Shutdown VIL SHDN Input Voltage Low l 300 mV VIH SHDN Input Voltage High l 1.4 V RIN SHDN Pull-Down Resistance 40 kΩ ICLPS CLP Shutdown Current CLP = 12V, DCIN = 0V l 15 26 µA SHDN = 0V 350 500 µA ILEAK-BAT BAT Leakage Current SHDN = 0V or DCIN = 0V, l –1.5 0 1.5 µA 0V ≤ CSP = CSN = BAT ≤ 18V ILEAK-CSN CSN Leakage Current SHDN = 0V or DCIN = 0V, l –1.5 0 1.5 µA 0V ≤ CSP = CSN = BAT ≤ 20V ILEAK-CSP CSP Leakage Current SHDN = 0V or DCIN = 0V, l –1.5 0 1.5 µA 0V ≤ CSP = CSN = BAT ≤ 20V ILEAK-SW SW Leakage Current SHDN = 0V or DCIN = 0V, l –1 0 2 µA 0V ≤ SW ≤ 20V 40123fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Operation Applications Information Package Description Revision History Typical Application Related Parts
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