MAX8902A, MAX8902B

Description

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The MAX8902A/MAX8902B low-noise linear regulators deliver up to 500mA of output current with only 16µV_RMS of output noise in a 100kHz bandwidth. These regulators maintain their output voltage over a wide input range, requiring only 100mV of input-to-output headroom at full load.

These LDOs maintain a low 80µA typical supply current, independent of the load current and dropout voltage. The regulator control circuitry includes a programmable soft-start circuit and short circuit, reverse current, and thermal-overload protection. Other features include an enable input and a power-OK output (MAX8902B only).

The MAX8902A output voltage can be set to 1.5V, 1.8V, 2.0V, 2.5V, 3.0V, 3.1V, 3.3V, 4.6V, or 4.7V using the SELA and SELB inputs. The MAX8902B output voltage can be set between 0.6V and 5.3V with an external resistor voltage-divider.

Key Features

• 1.7V to 5.5V Input Voltage Range
• 0.6V to 5.3V Output Voltage Range
• 16µV_RMS Output Noise, 10Hz to 100kHz
• 80µA Operating Supply Current
• 92dB PSRR at 5kHz
• Guaranteed 500mA Output Current
• ±1.5% Output Accuracy Over Load, Line, and Temperature
• 100mV (max) Dropout at 500mA Load
• < 1µA Shutdown Supply Current
• 700mA Short-Circuit Protection
• Thermal-Overload Protection
• Output-to-Input Reverse Current Protection
• 2mm x 2mm x 0.8mm TDFN Package

Applications/Uses

• MP3 and Portable Media Players
• Notebook Computers
• Smartphones