LM1572 Datasheet | National Semiconductor

Description The LM1572 is a 500k Hz step-down (buck) switching voltage regulator capable of driving up to 1.5A in to a load while occupying a very small PCB area. Current Mode Control results in superior transient response and regulation over a wider range of operating conditions. National’s advanced analog bipolar, CMOS plus DMOS process enables high efficiency at high switching frequency, and the internal 150mΩ MOSFET switch provides more power from a smaller package. The LM1572 has programmable soft-start and frequency foldback to limit the inrush current, and a TTL patible shutdown for easy sequencing. It draws 2.3m A of supply current in standby mode, and only 26µA in shutdown mode. The LM1572 is available in a TSSOP-16 package with an adjustable output or fixed outputs of 5V and 3.3V. The adjustable version can be set between 2.42V and 5V. Features n 500k...