The MAX732 and MAX733 are CMOS step‑up DC‑DC switch‑mode regulators. MAX732 provides a regulated +12 V output from a 4.0 V‑9.3 V input and up to 200 mA load current, while MAX733 delivers +15 V from a 4.0 V‑11.0 V input with up to 125 mA load current. Both devices use a current‑mode PWM controller, feature cycle‑by‑cycle current limiting, over‑current and undervoltage lockout protection, and operate with a single 504 µH inductor.
The datasheet includes absolute maximum ratings, detailed electrical characteristics, pin descriptions for the 8‑pin DIP and 16‑pin wide‑SO packages, soft‑start timing tables, and example application schematics for flash‑memory programming supplies and battery‑powered converters. Recommended component values for inductors and output capacitors are also provided.
| MAX732 Output Voltage | +12 V |
|---|---|
| MAX733 Output Voltage | +15 V |
| MAX732 Input Voltage Range | 4.0 V – 9.3 V |
| MAX733 Input Voltage Range | 4.0 V – 11.0 V |
| MAX732 Maximum Load Current | 200 mA |
| MAX733 Maximum Load Current | 125 mA |
| Typical Efficiency (full load) | 85 % – 92 % |
| Oscillator Frequency | 170 kHz (typical) |
| Undervoltage Lockout Threshold | 4.0 V (typical) |
The internal oscillator typically runs at 170 kHz.
The MAX732 can deliver up to 200 mA of output current.
The MAX733 accepts input voltages from 4.0 V to 11.0 V.