Texas Instruments

MAX660MX

MAX660MX Description

The MAX660MX from Texas Instruments is a fixed-output, charge pump voltage inverter designed to deliver 100mA output current with an input voltage range of 1.5V to 5.5V. This surface-mount IC (packaged in 8-SOIC and supplied in Tape & Reel) is optimized for ratiometric operation, making it ideal for precision applications. It supports dual switching frequencies (10kHz and 80kHz), allowing flexibility in noise versus efficiency trade-offs. Although marked as obsolete, its robust design and REACH-unaffected compliance ensure reliability in existing deployments.

MAX660MX Features

• Wide Input Range: Operates from 1.5V to 5.5V, accommodating low-voltage systems.
• High Output Current: Delivers 100mA, suitable for moderate-power applications.
• Dual Frequency Modes: 10kHz (low noise) and 80kHz (high efficiency) options.
• Ratiometric Functionality: Ensures output accuracy proportional to input voltage.
• Simple Topology: Non-synchronous charge pump eliminates external inductors, reducing board space.
• MSL 1 Rated: Unlimited shelf life with no moisture sensitivity concerns.
• Positive/Negative Output: Configurable for inverting or doubling applications.

MAX660MX Applications

• Portable Electronics: Powers LCD bias circuits and sensor interfaces in battery-operated devices.
• Signal Conditioning: Generates negative rails for op-amps and data converters.
• Industrial Systems: Used in low-noise instrumentation where ratiometric accuracy is critical.
• Legacy Designs: Maintains functionality in obsolete but still-deployed systems due to its reliability.

Conclusion of MAX660MX

The MAX660MX stands out for its versatile input range, ratiometric precision, and compact charge pump design. While newer alternatives exist, its dual-frequency operation and 100mA drive capability make it a pragmatic choice for specific low-voltage, noise-sensitive applications. Engineers valuing simplicity and proven performance in legacy or space-constrained designs will find this IC particularly advantageous.