LT1761IS5-2.8#TRMPBF

LT1761IS5-2.8#TRMPBF is a micropower, low-noise, low-dropout regulator. With an external 0.01μF bypass capacitor, output noise drops to 20μVRMS over a 10Hz to 100KHz bandwidth. Designed for use in battery-powered systems, the low 20μA quiescent current makes it an ideal choice. In shutdown, the quiescent current drops to less than 0.1μA. This device is capable of operating over an input voltage from 1.8V to 20V and can supply 100mA of output current with a dropout voltage of 300mV. Quiescent current is well-controlled, not rising in dropout as it does with many other regulators. This regulator is stable with output capacitors as low as 1μF. Small ceramic capacitors can be used without the series resistance required by other regulators. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting, and reverse current protection. Applications include cellular phones, pagers, battery-powered systems, frequency synthesizers, and wireless modems.

• Wide input voltage range from 1.8V to 20V, stable with 1μF output capacitor
• Reverse-battery protected, no reverse current, no protection diodes needed
• Regulated output voltage is 2.8V typical at (VIN = 3.3V, ILOAD = 1mA, TA = 25°C)
• Load regulation is 10mV typical at (VIN = 3.8V, ΔILOAD = 1mA to 50mA, TA = 25°C)
• Output voltage noise is 20μVRMS typical at (COUT = 10μF, CBYP = 0.01μF, ILOAD = 100mA)
• Quiescent current in shutdown is 0.01µA typ at (VIN = 6V, VSHDN = 0V, TA = 25°C)
• Ripple rejection is 65dB typical at (VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz)
• GND pin current is 20μA typical at (ILOAD = 0mA, TA = 25°C)
• Reverse output current is 10μA typical at (VOUT = 2.8V, VIN < 2.8V, TA = 25°C)
• Operating junction temperature range from -40°C to 125°C, 5-lead plastic TSOT-23

Notes

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