The MAX1595 is a regulated 3.3V/5.0V step-up/step-down charge pump from Maxim Integrated Products. It has an input voltage range of 1.8V to 5.5V and a maximum output current of 125mA. The chip operates at a 1MHz switching frequency and features high efficiency and small size.
The MAX1595 charge‑pump regulator provides a regulated 3.3 V or 5 V output from a 1.8 V to 5.5 V input. Its unique control architecture enables step‑up and step‑down operation while using only three external ceramic capacitors—no inductors are required. The device is offered in compact 8‑pin UMAX and 12‑pin thin QFN packages, making it suitable for space‑constrained applications such as white‑LED backlighting, flash‑memory supplies, and PCMCIA cards.
Key features include a 1 MHz switching frequency, 125 mA maximum output current, low quiescent current (220 µA) and ultra‑low shutdown current (0.1 µA). The datasheet provides detailed pin descriptions, recommended capacitor values, electrical characteristics, and layout guidelines to help designers achieve optimal performance.
| Input Voltage Range | 1.8 V – 5.5 V |
|---|---|
| Output Voltage Options | 3.3 V or 5.0 V |
| Maximum Output Current | 125 mA |
| Switching Frequency | 1 MHz |
| Quiescent Current (Normal) | 220 µA |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Types | 8‑pin UMAX, 12‑pin Thin QFN |
The device operates from 1.8 V up to 5.5 V input.
It can supply up to 125 mA of load current.
No, the regulator works with only three external ceramic capacitors.