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
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Overview
Features and Benefits
- 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
Product Details
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.
Applications
- Cell Phones/Cordless Phones
- Digital Cameras
- Handheld Instruments (PDAs, Palmtops)
- Notebook Computers
- PCMCIA Cards
- PDAs and Palmtop Computers
- Wireless Local Area Networks (WLANs)
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Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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