ANALOG DEVICES LT1175IT#PBF LDO Voltage Regulator, Adjustable, -4.3 to -20V in, 500mV Drop, 0.5A Out, TO-220-5, -40 to 125 °C

LT1175IT#PBF is a negative micropower low dropout regulator, featuring a quiescent current of 45?A, which drops to 10?A in shutdown mode. Its new reference amplifier topology provides precision DC characteristics while maintaining good loop stability with an extremely wide range of output capacitors. The regulator achieves very low dropout voltage and high efficiency through a unique power transistor anti-saturation design. Additionally, several user-friendly features are incorporated into the LT1175. The SHDN pin can interface directly with either positive or negative logic levels, and the output can be forced to reverse voltage without damage or latchup. Unlike some earlier designs, the increase in quiescent current during a dropout condition is actively limited. Applications for this regulator include analogue systems, modems, instrumentation, A/D and D/A converters, interface drivers, and battery-powered systems.

• Adjustable current limit, low voltage linear dropout characteristics
• Stable with wide range of output capacitors, positive or negative shutdown logic
• Quiescent input supply current is 45?A typical at (VIN � VOUT ? 12V, TA = 25°C)
• Input supply current in shutdown is 10?A typical at (active-low VSHDN = 0V, TA = 25°C)
• Dropout voltage is 0.1V typical at (IOUT = 25mA)
• Current limit is 800mA typical at (VIN � VOUT = 1V to 12V)
• Load regulation is 0.1% typical at (IOUT = 0mA to 500mA)
• Output voltage temperature drift is 0.25% typical at (TJ = 25°C to TJMIN, or 25°C to TJMAX)
• Output voltage accuracy is 1.5 % typical at (VIN � VOUT = 1V to VIN = 20V, IOUT = 0A to 500mA)
• Operating junction temperature range from -40°C to 125°C, 5-lead plastic TO-220 package

Notes

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