LT1120CS8#PBF

LT1120CS8#PBF is a combination micropower positive regulator and free collector comparator on a single monolithic chip. With only 40μA supply current, the LT1120 can supply over 125mA of output current. Input voltage range is from 4.5V to 36V and dropout voltage is 0.6V at 125mA. Dropout voltage decreases with lower load currents. Also included on the chip is a class B output 2.5V reference that can either source or sink current. A shutdown pin allows logic shutdown of the output. The comparator can be used for system or battery monitoring. For example, the comparator can be used to warn of low system voltage. Frequency compensation of the comparator for amplifier applications can be obtained by adding external output capacitance. Applications include battery systems, battery-backup system, portable terminals, portable instruments, memory keep-alive.

• Logic shutdown, thermal limiting, 2.5V reference voltage
• Reference load regulation is 0.3% typical at (-2mA ≤ IREF ≤ 2mA, VIN = 12V, TA = 25°C)
• Reference output source current is 4mA typical at (VIN = 5V, TA = 25°C)
• Regulator supply current is 45μA typical at (VIN = 6V, IOUT ≤ 100μA, TA = 25°C)
• Regulator drop voltage is 0.02V typical at (IOUT = 100μA, TA = 25°C)
• Shutdown pin current is 25μA typical at (VIN = 1.4V, TA = 25°C)
• Short-circuit current is 300mA typical at (VIN = 36V, TA = 25°C)
• Comparator offset voltage is 3mV typical at (VIN = 36V, TA = 25°C)
• Comparator power supply rejection is 96dB typical at (4.5V ≤ VS ≤ 36V, TA = 25°C)
• Operating temperature range from 0°C to 100°C, 8-lead plastic SO package

Notes

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