Overview of MAX667
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 an d 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.
Key features of MAX667
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
MAX667 application/use
automobile electron
Pager and wireless control receiver
Portable instrument
Solar power supply instrument
MAX667 application circuit