The LMR70503 is an inverting buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin micro SMD
package (0.84 mm × 1.615 mm × 0.6 mm). Its unique control method is designed to provide fast transient response, low output
noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current
limit, minimum switching frequency limit, and Under Voltage Lock Out (UVLO), with no external compensation required. For
ease of use, the EN pin is referred to the IC ground instead of the negative output voltage. The LMR70503 is operating in
Discontinuous Conduction Mode (DCM) in light load. The minimum switching frequency is limited to 500 kHz to avoid audio
frequency interference to other systems. Very small total solution size can be achieved with the tiny footprint of the LMR70503
and the low external component count.