Datasheet LTC4012, LTC4012-1, LTC4012-2 (Analog Devices) - 3

LTC4012/ LTC4012-1/LTC4012-2 e lectrical characteristics
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Charge Voltage Regulation
VTOL VBAT Accuracy (See Test Circuits) LTC4012 –0.5 0.5 % C-Grade l –0.8 0.8 % I-Grade l –1.0 1.0 % LTC4012-1/LTC4012-2 –0.6 0.6 % C-Grade l –0.8 0.8 % FVS1 = 0V, FVS0 = 0V, I-Grade l –1.1 1.1 % FVS1 = 0V, FVS1 = 5V, I-Grade l –1.15 1.15 % FVS1 = 5V, FVS0 = 0V, I-Grade l –1.25 1.25 % FVS1 = 5V, FVS1 = 5V, I-Grade l –1.35 1.35 % 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 LTC4012 l 1.235 1.281 1.32 V BAT Overvoltage Threshold LTC4012-1/LTC4012-2, Relative to l 103 106 109 % Selected Output Voltage
Charge Current Regulation
ITOL Charge Current Accuracy with RIN = 3.01k, RPROG = 26.7k –4 4 % 6V < BAT < 18V (LTC4012) C-Grade l –5 5 % 6V < BAT < 15V (LTC4012-1, LTC4012-2) 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 (LTC4012) PROG = 1.2V 6V < BAT < 15V (LTC4012-1, LTC4012-2) 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
VACP AC Present Threshold Voltage DCIN – BAT, DCIN Rising C-Grade l 350 500 650 mV I-Grade l 300 700 mV VACP(HYST) ACP Threshold Hysteresis Voltage 200 mV VIL SHDN Input Voltage Low l 300 mV VIH SHDN Input Voltage High l 1.4 V 4012fa Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Test Circuits Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts