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The MAX734 is a +12 V output, step‑up, DC‑DC switch‑mode regulator designed for flash‑memory programming supplies. It converts a low input voltage (as low as 4.75 V) to a regulated +12 V output, delivering a guaranteed 120 mA while consuming only 1.2 mA quiescent current.
Key features include a fixed 170 kHz oscillator, logic‑controlled shutdown (70 µA shutdown current), 85 % typical efficiency, and compact 8‑pin SO or DIP packages that fit into less than 0.3 in³. The device supports various applications such as PCMCIA +12 V supplies and solid‑state disk drives.
| Regulated Output Voltage | +12 V ±5 % |
|---|---|
| Output Current | 120 mA (guaranteed) |
| Typical Efficiency | 85 % (typical) |
| Shutdown Supply Current | 70 µA |
| Quiescent Supply Current (no load) | 1.2 mA |
| Oscillator Frequency | 170 kHz |
| Minimum Input Voltage | 4.75 V |
| Package Options | 8‑pin SO and Plastic DIP |
The device provides a regulated +12 V output with a tolerance of ±5 %.
It guarantees an output current of 120 mA.
Typical efficiency is about 85 %.
The shutdown supply current is 70 µA.