4µV Ultra-Low-Noise 1A LDO with Two-Level Output-Voltage Selection

The MAX38913/MAX38914 is a low-noise linear regulator that delivers up to 1A of load current with as low as 4μVRMS of output noise. The MAX38913/MAX38914 can dynamically change its output voltage between two separate levels. The MAX38913/MAX38914 has the pass-through mode which, when enabled, completely bypasses the linear regulator.

This regulator maintains ±1% output accuracy over a wide input voltage range, temperature, and load conditions. The no-load quiescent current in the regulation mode is 1.37mA. During the pass-through mode, unlike the conventional dropout mode of an LDO, the MAX38913/MAX38914 consumes very little quiescent current. The MAX38913/MAX38914 has a 6Ω active discharge feature to quickly discharge output capacitors of up to 300μF.

The MAX38913 has 33 programmable output-voltage settings for both voltage selections. The MAX38914 has pre-programmed output voltage levels of 2.3V and 2V. The MAX38913/MAX38914 is packaged in either a space-saving 12-bump WLP or a full-featured 3mm x 3mm, 14-pin TDFN package. Optional power-OK and power-on-reset pins are available in the 14-pin TDFN version.

Applications

* Image Sensors * Portable Sensor Applications * SD Memory Cards

* Delivers Flexible Output Range

* 1.8V to 5.5V Input Voltage Range

* 0.6V to 5.0V Output Voltage Range

* 1A Maximum Output Current

* 28mV Dropout at 1A Load Current and 5.0V Supply

* 33mV Dropout at 1A Load Current and 3.6V Supply

* Excellent DC and AC Performance

* 1% Regulation over Line, Load, and Temperature

* 4µVRMS of Output Noise, 10Hz to 100kHz

* 75dB PSRR at 10kHz

* High-Level System Integration

* Integrated Pass-Through Function

* Fast Active Discharge of 6Ω at OUT

* Dynamic Two-Level Voltage Scaling with 33 Levels for Each Option for Flexible Configuration (MAX38913)

* 2V, 2.3V Pre-Programmed Voltage Levels (MAX38914)

* Stable with 4µF (Minimum Capacitance)

* Overcurrent and Overtemperature Protection

* Power-OK/Power-on-Reset Output

* Operation Temperature Range from -40°C to +125°C

* Package

* 12-Bump, 0.4mm-Pitch WLP

* 14-Pin, 3mm x 3mm TDFN