The MAX731 and MAX752 are CMOS step‑up DC‑DC switch‑mode regulators. The MAX731 accepts a positive input voltage between +2.5 V and +5.25 V and provides a fixed +5 V output at 200 mA. The MAX752 is an adjustable version that converts a minimum of +1.8 V to any voltage up to +15 V, also at up to 200 mA. Both devices use current‑mode PWM control, offer cycle‑by‑cycle current limiting, over‑current protection, external shutdown, and programmable soft‑start.
The document includes absolute maximum ratings, electrical characteristics, typical operating waveforms, pin descriptions, recommended external components, layout guidelines, and ordering information for multiple package options (8‑Pin DIP, 16‑Pin Wide SO, etc.).
| Fixed output voltage (MAX731) | +5 V |
|---|---|
| Adjustable output voltage range (MAX752) | +1.8 V to +15 V |
| Typical full‑load efficiency (MAX731) | 82 % to 87 % |
| Typical quiescent current (MAX731) | 2 mA |
The MAX731 operates with an input voltage between +2.5 V and +5.25 V.
The MAX752 includes cycle‑by‑cycle current limiting, over‑current limiting, external shutdown, and programmable soft‑start protection.
Both devices use a fixed 170 kHz oscillator frequency.
Available packages include 8‑Pin DIP, 16‑Pin Wide SO, and 8‑Pin CERDIP.