MAX730ACSA

The MAX730ACSA is a 5V-output CMOS step-down switching regulator designed for various applications including portable instruments and cellular phones. It accepts input voltages between 5.2V and 11V and delivers a regulated 5V output at up to 450mA. The device utilizes pulse-width modulation (PWM) current-mode control for precise regulation and excellent transient response.

Key electrical characteristics include high efficiencies ranging from 85% to 96%, a quiescent supply current of 1.7mA, and a shutdown current of only 6µA. The fixed-frequency switching operates at 170kHz, allowing for easy filtering of output ripple and noise. The regulator also incorporates cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection.

Packaged in an 8-pin SOIC surface mount package, the MAX730ACSA is suitable for space-constrained designs. Its output voltage accuracy is guaranteed to be ±5% over line, load, and temperature variations. The design requires only a single preselected inductor value, simplifying component selection and board layout.

Applications for the MAX730ACSA include portable instruments, cellular phones and radios, personal communicators, distributed power systems, and computer peripherals. Its robust feature set and compact package make it a versatile choice for power management solutions.