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LT1579CGN-5 Datasheet(PDF) 11 Page - Linear Technology |
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LT1579CGN-5 Datasheet(HTML) 11 Page - Linear Technology |
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11 / 20 page  11 LT1579 PIN FUNCTIONS LBO1: This is the open collector output of the low-battery comparator LB1. This output pulls low when the com- parator input drops below the threshold voltage. The LBO1 output voltage is 1V when sinking 5mA, dropping to under 200mV at 20 µA (see curve of Logic Flag Voltage vs Current in the Typical Performance Characteristics). This makes the LBO1 pin equally useful in driving both bipolar and CMOS logic inputs with the addition of an external pull-up resistor. It is also capable of driving higher current devices, such as LEDs. This pin is inter- nally clamped to 7V and – 0.6V (one VBE). If unused, this pin can be left open circuit. Device operation is unaffected if this pin is not connected. LBO2: This is the open collector output of the low-battery comparator LB2. This output pulls low when the com- parator input drops below the threshold voltage. The LBO2 output voltage is 1V when sinking 5mA, dropping to under 200mV at 20 µA (see curve of Logic Flag Voltage vs Current in the Typical Performance Characteristics). This makes the LBO2 pin equally useful in driving both bipolar and CMOS logic inputs with the addition of an external pull-up resistor. It is also capable of driving higher current devices, such as LEDs. This pin is internally clamped to 7V and – 0.6V (one VBE). If unused, this pin can be left open circuit. Device operation is unaffected if this pin is not connected. BLOCK DIAGRAM – + + – LB1 – + LB2 1.5V REFERENCE BIAS CURRENT CONTROL DROPOUT DETECT VIN1 VIN2 SHDN SS BIASCOMP LBI1 LBI2 VOUT ADJ BACKUP DROPOUT LBO1 LBO2 OUTPUT DRIVER CONTROL WARNING FLAGS 1579 • BD E/A INTERNAL RESISTOR DIVIDER FOR FIXED VOLTAGE DEVICES ONLY |
Similar Part No. - LT1579CGN-5 |
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Similar Description - LT1579CGN-5 |
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