5V Programmable, Low-Dropout Voltage Regulator

The MAX667 low-dropout, positive, linear voltage regulator supplies up to 250mA of output current. With no load, it has a typical quiescent current of 20µA. At 200mA of output current, the input/output voltage differential is typically 150mV. Other features include a low-voltage detector to indicate power failure, as well as early-warning and low-dropout detectors to indicate an imminent loss of output voltage regulation. A shutdown control disables the output and puts the circuit into a low quiescent-current mode.

The MAX667 employs Dual Mode™ operation. One mode uses internally trimmed feedback resistors to produce +5V. In the other mode, the output may be varied from +1.3V to +16V by connecting two external resistors.

The MAX667 is a pin-compatible upgrade to the MAX666 in most applications where the input voltages are above +3.5V. Choose the MAX667 when high output currents and/or low dropout voltages are desired, as well as for improved performance at higher temperatures.

Applications

* Automotive Electronics * Pagers and Radio Control Receivers * Portable Instrumentation * Solar-Powered Instruments

* 350mV Max Dropout at 200mA

* 250mA Output Current

* Normal Mode: 20µA Typ Quiescent Current

* Shutdown Mode: 0.2µA Typ Quiescent Current

* Low-Battery Detector

* Fixed +5V (Min Component Count) or Adjustable Output

* +3.5V to +16.5V Input

* Dropout Detector Output

* 10µF Output Capacitor