ANALOG DEVICES LT1073CN8#PBF DC-DC Switching Boost/Buck Regulator, Adjustable, 1 to 30V in, 50V / 0.4A Out, DIP-8

LT1073CN8#PBF is a versatile micropower DC/DC converter requiring only three external components. With an exceptionally low minimum supply voltage of 1V, the LT1073 can be utilized in applications where the primary power source is a single cell. An on-chip auxiliary gain block can serve as a low-battery detector or linear post-regulator. The device can easily be configured as a step-up or stepdown converter, although for most step-down applications or input sources greater than 3V, the LT1173 is recommended. Switch current limiting is user-adjustable by adding a single external resistor. Applications for this converter range from pagers, cameras, and single-cell to 5V converters, to battery backup supplies, laptop and palmtop computers, cellular telephones, portable instruments, 4mA to 20mA loop powered instruments, hand-held inventory computers, and battery-powered ?, ?, and ? particle detectors.

• Operates at supply voltages from 1V to 30V, works in step-up or step-down mode
• Low-battery detector comparator on-chip, user-adjustable current limit
• Internal 1A power switch, no design required, adjustable output voltage
• Quiescent current is 95µA typical at (switch off)
• Oscillator frequency is 19KHz typical at (TA = 25°C, VIN = 1.5V)
• Duty cycle is 72% typical
• Current limit is 400mA typical at (220 ohm between ILIM and VIN, TA = 25°C)
• Comparator hysteresis is 5mV typical at (TA = 25°C)
• Operating temperature range from 0°C to 70°C
• 8-lead PDIP package

Notes

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