LT1769 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25 ° C. VCC = 16V, VBAT = 8V. No load on any outputs unless otherwise noted.PARAMETERCONDITIONSMINTYPMAXUNITSVoltage Amplifier VA Transconductance (Note 3) Output Current from 50µA to 500µA 0.25 0.6 1.3 mho Output Source Current VOVP = VREF + 10mV, VPROG = VREF + 10mV 1.1 mA OVP Input Bias Current VA Output Current at 0.5mA ● ±3 ±10 nA VA Output Current at 0.5mA, TA > 90°C ● –15 25 nA VA Output Current at 0.5mA, TA < 0°C ±15 nA Current Limit Amplifier CL1, 8V ≤ Input Common Mode Turn-On Threshold 0.5mA Output Current 93 100 110 mV Transconductance Output Current from 50µA to 500µA 0.5 1 2 mho CLP Input Current 0.5mA Output Current, VUV ≥ 0.4V 0.3 1 µA CLN Input Current 0.5mA Output Current VUV ≥ 0.4V 0.8 2 mA Note 1: Absolute Maximum Ratings are those values beyond which the life Note 3: Tested with Test Circuit 2. of a device may be impaired. Note 4: A linear interpolation can be used for reference voltage Note 2: Tested with Test Circuit 1. specification between 0°C and – 40°C. WUTYPICAL PERFORMANCE CHARACTERISTICSEfficiency of Figure 1 CircuitICC vs Duty CycleICC vs VCC 100 8 7.0 V V MAXIMUM DUTY CYCLE IN = 16.5 CC = 16V 98 VBAT = 8.4V 7 96 6.5 TJ = 0°C 6 94 TJ = 25°C 92 5 6.0 CHARGER EFFICIENCY TJ = 0°C T 90 (mA) 4 TJ = 125°C (mA) J = 125°C I CC I CC 88 TJ = 25°C 5.5 3 EFFICIENCY (%) 86 INCLUDES LOSS 2 84 IN DIODE D3 5.0 1 82 80 0 4.5 0.2 0.6 1.0 1.4 1.8 2.2 0 10 20 30 40 50 60 70 80 0 5 10 15 20 25 30 IBAT (A) DUTY CYCLE (%) VCC (V) 1769 G01 1769 G02 1769 G03 1769fa 4