LTC4123 elecTrical characTerisTicsThe l denotes the specifications which apply over the specified operatingjunction temperature range, otherwise specifications are at TA = 25°C. VACIN = 0V, VCC = 5V unless otherwise noted (Notes 2, 3, 4). SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSThermal Sensing Cold Temperature Fault Threshold Die Temperature Falling –5 °C Hysteresis 5 °C Hot Temperature Fault Threshold Die Temperature Rising 70 °C Hysteresis 5 °C Zinc-Air Battery Detection VZn-AIR Zinc-Air Fault Threshold Voltage VBAT Rising 1.60 1.65 V Hysteresis 40 mV TZn-AIR Zinc-Air Detection Period 80 s Charge Voltage Limit During Zinc-Air Battery Detection 1.8 V Zinc-Air Detection Charge Current RPROG = 23.7kΩ 1 mA Reverse Polarity Detection VREVPOL Reverse Polarity Threshold Voltage VBAT Falling –50 mV Hysteresis 40 mV AC Rectification VCC(HIGH) VCC High Voltage Limit VCC Rising 5 V VCC(LOW) VCC Low Voltage Limit VCC Falling 3 V ACIN to VCC Voltage Drop IVCC = –20mA, Charger Terminated 0.65 V Status Pin (CHRG) ICHRG CHRG Pin Pull-Down Current VCHRG = 450mV 250 340 430 µA CHRG Leakage Current CHRG = 5V 1 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings impedance and other environmental factors. The junction temperature may cause permanent damage to the device. Exposure to any Absolute (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and Maximum Rating condition for extended periods may affect device power dissipation (PD, in Watts) according to the following formula: reliability and lifetime. TJ = TA + (PD • θJA), where θJA (in °C/W) is the package thermal Note 2: The LTC4123 is tested under conditions such that TJ ≈ TA. The impedance. LTC4123E is guaranteed to meet specifications from 0°C to 85°C junction Note 3: All currents into pins are positive; all voltages are referenced to temperature. Specifications over the –20°C to 85°C operating junction GND unless otherwise noted. temperature are assured by design, characterization and correlation with Note 4: These parameters are guaranteed by design and are not 100% statistical process controls. Note that the maximum ambient temperature tested. The battery charge voltage variation over temperature is guaranteed consistent with these specifications is determined by specific operating in a ±15mV band as shown in the Typical Performance Characteristics curve. conditions in conjunction with board layout, the rated package thermal 4123fa For more information www.linear.com/LTC4123 3
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