The MAX8667/MAX8668 are dual step-down converters and dual low-dropout (LDO) linear regulators designed to power low-voltage microprocessors or DSPs in portable devices. They offer high efficiency and small external component size. The step-down converters can be adjusted from 0.6V to 3.3V (MAX8668) or factory preset (MAX8667), with a guaranteed output current of 600mA for OUT1 and 1200mA for OUT2. The 1.5MHz hysteretic-PWM control scheme allows for tiny external components and reduces no-load operating current to 100µA. The dual low-quiescent-current, low-noise LDOs operate down to 1.7V supply voltage. The MAX8667/MAX8668 have individual enables for each output, maximizing flexibility. They are available in a space-saving, 3mm x 3mm, 16-pin thin QFN package.
The Maxim MAX8667/MAX8668 family provides dual step‑down DC‑DC converters and dual low‑dropout linear regulators in a compact 3 mm × 3 mm, 16‑pin thin QFN package. Designed for portable devices, the converters deliver up to 600 mA on OUT1 and 1200 mA on OUT2, while the LDOs supply up to 300 mA each with low quiescent current.
The datasheet details absolute maximum ratings, electrical characteristics, typical operating curves, pin descriptions, thermal limits, PCB layout recommendations and ordering information. It also includes evaluation‑kit availability and recommended external component values for optimal performance.
| Input voltage range (step‑down regulators) | 2.6 V to 5.5 V |
|---|---|
| Input voltage range (LDO regulators) | 1.7 V to 5.5 V |
| Guaranteed output current OUT1 | 600 mA |
| Guaranteed output current OUT2 | 1200 mA |
| No‑load supply current (all regulators enabled) | 100 µA |
| Package | 16‑pin thin QFN, 3 mm × 3 mm |
| Operating temperature range | -40 °C to +85 °C |
| LDO supply current (typical) | 20 µA |
The step‑down converters operate with an input voltage from 2.6 V to 5.5 V.
OUT1 is guaranteed to supply 600 mA, while OUT2 can supply 1200 mA.
Both devices are offered in a 16‑pin thin QFN package measuring 3 mm × 3 mm.
The no‑load supply current is typically 100 µA.