Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators

 

Part Number	Replacement	Explanation

Description

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The MAX8510/MAX8511/MAX8512 ultra-low-noise, low-dropout (LDO) linear regulators are designed to deliver up to 120mA continuous output current. These regulators achieve a low 120mV dropout for 120mA load current. The MAX8510 uses an advanced architecture to achieve ultra-low output voltage noise of 11µV_RMS and PSRR of 54dB at 100kHz.

The MAX8511 does not require a bypass capacitor, hence achieving the smallest PC board area. The MAX8512's output voltage can be adjusted with an external divider.

The MAX8510/MAX8511 are preset to a variety of voltages in the 1.5V to 4.5V range. Designed with a P-channel MOSFET series pass transistor, the MAX8510/MAX8511/MAX8512 maintain very low ground current (40µA).

The regulators are designed and optimized to work with low-value, low-cost ceramic capacitors. The MAX8510 requires only 1µF (typ) of output capacitance for stability with any load. When disabled, current consumption drops to below 1µA.

Package options include a 5-pin SC70 and a tiny 2mm x 2mm x 0.8mm TDFN package.

MAX8510, MAX8511, MAX8512: Functional Diagram Enlarge+

Key Features

• Space-Saving SC70 and TDFN (2mm x 2mm) Packages
• 11µV_RMS Output Noise at 100Hz to 100kHz Bandwidth (MAX8510)
• 78dB PSRR at 1kHz (MAX8510)
• 120mV Dropout at 120mA Load
• Stable with 1µF Ceramic Capacitor for Any Load
• Guaranteed 120mA Output
• Only Need Input and Output Capacitors (MAX8511)
• Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3V, 3.3V, 4.5V (MAX8510/MAX8511) and Adjustable (MAX8512)
• Low 40µA Ground Current
• Excellent Load/Line Transient
• Overcurrent and Thermal Protection

Applications/Uses

• Base Stations
• Bluetooth® Portable Radios and Accessories
• Cellular and Cordless Phones
• Digital Cameras
• PDA and Palmtop Computers
• Personal Stereos
• Portable and Battery-Powered Equipment
• Wireless LANs