The ADP667 is a low-dropout precision voltage regulator that can supply up to 250 mA of output current. It can be used to provide a fixed +5V output with no additional external components or can be adjusted from +1.3V to +16V using two external resistors. Fixed or adjustable operation is automatically selected via the SET input. The low quiescent current (20µA) in conjunction with the low dropout (150mV) makes the ADP667 an ideal choice for portable and low-power applications.
The ADP667 is a precision low‑dropout linear voltage regulator that can provide a fixed +5 V output or an adjustable output from +1.3 V to +16 V using external resistors. It operates over an input range of 3.5 V to 16.5 V and is suitable for handheld instruments, cellular phones, battery‑powered devices, and solar‑powered equipment.
Key features include a low dropout voltage (150 mV @200 mA), low quiescent current (20 mA normal, 0.2 mA shutdown), a dropout detector, and a low‑battery‑detect circuit. The device is pin‑compatible with the MAX667 and is offered in 8‑pin DIP and narrow‑body SOIC packages.
| Input Voltage Range | 3.5 V to 16.5 V |
|---|---|
| Fixed Output Voltage | +5 V |
| Maximum Output Current | 250 mA |
| Dropout Voltage (200 mA) | 150 mV |
| Quiescent Current – Shutdown Mode | 0.2 mA |
| Low Battery Detector Input Threshold (V LBI) | 1.215 V to 1.295 V |
The ADP667 can supply up to 250 mA of output current.
At a 200 mA load the dropout voltage is 150 mV.
Connect the SET pin to a resistor divider; the output voltage follows VOUT = VSET·(R1+R2)/R1 with VSET = 1.255 V.
In shutdown mode the quiescent current is 0.2 mA.