4A High-Performance LDO Linear Regulators

The MAX38907/MAX38908 are fast transient response, high-PSRR nMOS linear regulators that deliver up to 4A load current.

These regulators support a wide input supply range from 0.9V up to 5.5V, and BIAS voltage range from 2.7V to 20V to provide wider supply options in a variety of applications. Output accuracy of ±1% is maintained over line, load, and temperature variations, requiring only 300mV of input-to-output headroom at full load for a good PSRR. The output voltage can be adjusted to a value in the range of 0.6V to 5.0V to accommodate customers that desire to specify a single LDO in the BOM for multiple voltage rails.

The MAX38907 is configurable to one of 27 output voltages using three digital configuration pins. Additionally, each output voltage selection can be adjusted ±5% for margining. The output voltage on the MAX38908 can be adjusted to a value in the range of 0.6V to 5.0V by using two external feedback resistors. These LDOs are fully protected from damage by internal circuitry that provides programmable inrush current limiting, output overcurrent limiting, reverse-current limiting, and thermal overload protection.

The MAX38907 is offered in a 20-pin, 5mm x 5mm TQFN package, while the MAX38908 is offered in 5 x 3 bump, 0.4mm pitch WLP and 14-pin, 3mm x 3mm TDFN packages.

Applications

* Base Stations * FPGAs and DSPs * Medical, Audio, and Instrumentation * PLCs * Portable Cameras * Server μPs

* Delivers Flexible Operating Range

* 0.9V to 5.5V Input Voltage Range

* 2.7V to 20V BIAS Voltage Range

* 0.6V to 5.0V Programmable Output Voltage

* 4A Maximum Output Current

* 51mV Dropout at 4A Load Current

* 1.6mA Operating BIAS Supply Current

* Reduces Noise and Improves Accuracy

* ±1% DC Accuracy Over Load, Line, and Temperature

* 28mV 4A Load Transient Excursion

* 78dB BIAS PSRR at 10kHz

* 52dB IN PSRR at 10kHz at 300mV Input-to-Output Headroom

* Enables Ease-of-Use and Robust Protection

* Stable with 10µF (Minimum) Output Capacitance

* Programmable Soft-Start Rate

* Overcurrent and Overtemperature Protection

* Output-to-Input Reverse Current Protection

* Power-OK Status Pin

* Reduces Size, Improves Reliability

* 14-pin (3mm x 3mm) TDFN, 20-pin (5mm x 5mm) TQFN, and 5 x 3 Bump, 0.4mm Pitch WLP Packages

* -40°C to 125°C Operating Temperature