LT1528CQ#TRPBF

LT1528 is a 3A low dropout regulator optimized to handle the large load current transients associated with the current generation of microprocessors. This device has the fastest transient response of currently available PNP regulators and is very tolerant of variations in capacitor ESR. Quiescent current is well controlled; it does not increase significantly as the device enters dropout. The regulator can operate with output capacitors as small as 3.3μF, although larger capacitors will be needed to achieve the performance required in most microprocessor applications. An external SENSE pin allows adjustment to output voltages greater than 3.3V, using a simple resistive divider. This device has both reverse input and reverse output protection and includes a shutdown feature. It is used in application such as microprocessor applications, post regulator for switching supplies, 5V to 3.3V logic regulator etc.

• Dropout voltage is 70mV at (ILOAD = 10mA)
• Regulated output voltage is 3.3V at (VIN = 3.8V, IOUT = 1mA)
• No protection diodes needed
• Controlled quiescent current in dropout
• Stable with 3.3μF output capacitor
• Thermal limiting
• Quiescent current in shutdown is 110μA typical
• Ripple rejection is 67dB typical at (VIN – VOUT = 1V(Avg), VRIPPLE = 0.5VP-P)
• Operating junction temperature is 0°C to 125°C
• Package style is 5-lead plastic DD-PAK

Notes

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