300mA LDO Linear Regulators - Maxim
Description
19-2532; Rev 2; 6/03
KIT ATION EVALU E L B A AVAIL
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
General Description Features
o 3 ✕ 3 UCSP, 6-Pin SOT23, and 8-Pin QFN Packages o Preset +1.
5V to +3.
3V Output (100mV Increments) o SET Pin for Adjustable Output Voltage o 75µVRMS LDO Output Voltage Noise (MAX6477–MAX6484) o ±2.
0% Accuracy Over Temperature o Guaranteed 300mA Output Current o Low Dropout Voltage 55mV at 150mA 114mV at 300mA o 82µA Supply Current, 0.
1µA Shutdown Current o Input Reverse Current, Thermal and Short-Circuit Protection o Microprocessor Reset with Four Timeout Options o Push-Pull or Open-Drain RESET o Manual Reset Input o Remote Feedback Sense
MAX6469–MAX6484
The MAX6469–MAX6484 are low-dropout linear regulators with a fully integrated microprocessor reset circuit.
Each is available with preset output voltages from +1.
5V to +3.
3V in 100mV increments and delivers up to 300mA of load current.
These devices consume only 82µA of supply current.
The low supply current, low dropout voltage, and integrated reset functionality make these devices ideal for battery-powered portable equipment.
The MAX6469–MAX6484 include a reset output that indicates when the regulator output drops below standard microprocessor supply tolerances (-7.
5% or -12.
5% of nominal output voltage).
This eliminates the need for an external microprocessor supervisor, while ensuring that supply voltages and clock oscillators have stabilized before processor activity is enabled.
Push-pull and opendrain active-low reset outputs are available, with reset timeout periods of 2.
5ms, 20ms, 150ms, or 1200ms (min).
The MAX6469/MAX6470/MAX6473–MAX6478/MAX6481– MAX6484 also have a shutdown feature that reduces the supply current to 0.
1µA (typ).
The MAX6471–MAX6474/ MAX6479–MAX6482 offer a manual reset input to assert a microprocessor reset while the regulator output is within specification.
The MAX6475/MAX6476/MAX6483/ MAX6484 feature a remote feedback sense pin for u...
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