MAX8531

19-2711; Rev 0; 1/03 Dual Low-Dropout Linear Regulators with RESET or Low-Noise Output in UCSP or QFN General Description The MAX8530/MAX8531 offer the benefits of lowdropout voltage and ultra-low power regulation in subminiaturized UCSP and QFN packages with an integrated microprocessor reset circuit (MAX8530 only). The devices operate from a 2.5V to 6.5V input and deliver up to 200mA and 150mA outputs with low dropout of 100mV (typ) at 100mA. Designed with an internal P-channel MOSFET pass transistor, the supply current is kept at a low 130µA (with both LDOs on), independent of the load current and dropout voltage. Other features include short-circuit protection and thermal-shutdown protection. The MAX8530 provides microprocessor open-drain, active-low reset output to monitor OUT1, eliminating external components and adjustments. The MAX8530 asserts a 100ms (min) RESET signal when OUT1 drops below 87% of the nominal output voltage. The MAX8531 includes a reference bypass pin for low output noise (40µVRMS). Both devices include a logic-controlled shutdown input and are available in 6-bump UCSP and 6-pin thin QFN exposed pad packages. KIT ATION EVALU E L B AVAILA Features o Guaranteed 200mA Output Current for OUT1 o Guaranteed 150mA Output Current for OUT2 o Low 100mV (typ) Dropout at 100mA Load for both LDOs o Open-Drain, Active-Low 100ms (min) Reset Timer (MAX8530) o Low 40µVRMS Output Noise (MAX8531) o Low 130µA Operating Supply Current o <1µA Shutdown Current o Thermal...