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MAX8531：Dual Low-Dropout Linear Regulator with Reset or Low-Noise Output in UCSP or QFN

Industry's Smallest, Low-Dropout Linear Regulators Designed for Low-Noise, Space-Sensitive Applications

The MAX8530/MAX8531 offer the benefits of low-dropout 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-bar 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.

Key Features Guaranteed 200mA Output Current for OUT1 Guaranteed 150mA Output Current for OUT2 Low 100mV (typ) Dropout at 100mA Load for both LDOs Open-Drain, Active-Low 100ms (min) Reset Timer (MAX8530) Low 40µVRMS Output Noise (MAX8531) Low 130µA Operating Supply Current <1µA Shutdown Current Thermal-Overload and Short-Circuit Protection Output Current Limit Tiny Packages Available 1.16 x 1.57 x 0.6mm UCSP (3 x 2 Grid) 3mm x 3mm Thin QFN

MAX8530, MAX8531: Functional Diagram Applications/Uses Cell Phones/Cordless Phones Digital Cameras Handheld Instruments (PDAs, Palmtops) Notebook Computers PCMCIA Cards PDAs and Palmtop Computers Wireless Local Area Networks (WLANs)

DataSheet

Parametrics

Design kits & evaluation modules

• MAX8530EVKIT
• MAX8531EVKIT

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