MAX1652~MAX1655 are high efficiency PWM step-down DC-DC controllers in a small QSOP package. MAX1653/MAX1655 are an upgrade of MAX797 with a pin-compatible 16-pin SOP package and improved output voltage range down to 1V and lower conduction loss.
The MAX1652‑MAX1655 family are compact 16‑pin SOP/QSOP DC‑DC controllers that combine PWM and PFM operation to maintain high efficiency over a wide load range. They feature an idle‑mode synchronous‑rectified PWM control method that can reach 96 % efficiency and deliver up to 10 A of output current. The devices automatically switch between PWM for heavy load and PFM for light load, and they support optional forced‑PWM operation for noise‑sensitive applications.
These controllers operate from an input voltage of 4.5 V to 30 V and provide selectable output voltage ranges of 2.5 V‑5.5 V (MAX1652/1653/1654) or 1 V‑5.5 V (MAX1655). Switching frequency can be fixed at 150 kHz or 300 kHz, or synchronized to an external clock between 190 kHz and 340 kHz. The datasheet includes absolute‑maximum ratings, electrical characteristics, pin‑out tables, standard operating circuits, and performance graphs. This manual is written in Japanese.
| Input Supply Range | 4.5 V – 30 V |
|---|---|
| Output Voltage Range (MAX1652‑1654) | 2.5 V – 5.5 V |
| Output Voltage Range (MAX1655) | 1 V – 5.5 V |
| Maximum Output Current | 10 A |
| Self‑Consumption Current | 170 µA |
The devices operate from 4.5 V to 30 V input voltage.
MAX1655 can be set to output voltages as low as 1 V up to 5.5 V.