MIC5280YME Microchip

MIC5280 25mA, 120V, Low I , High PSRR LDO Q General Description Features The MIC5280 is a high performance low dropout regulator, Wide input voltage range: 4.5V to 120V DC offering a very low noise output with a very wide input Very low quiescent current: 31A typical voltage operating range, up to 120V DC input voltage. 25mA guaranteed output current Ideal for high input voltage applications such as industrial Adjustable output from 1.215V to 5V and telecom, the MIC5280 offers 2% initial accuracy, DC voltage protection down to -24V extremely high power supply rejection ratio (PSRR > Ability to withstand up to +120V DC at the input 80dB) and low ground current (typically 31A). The MIC5280 can also be put into a zero-off-mode current Stable with ceramic output capacitors state, drawing a minuscule amount of current when Ultra High PSRR > 80dB for RF applications disabled. High output accuracy The MIC5280 has a very wide input voltage range, with a 2% initial accuracy DC rating from 24V to 120V. The MIC5280 is optimized 3% over temperature (40C to +125C) for line transient response, making it ideal for harsh environment applications. Thermal shutdown and current limit protection Thermally efficient 8-pin EPAD SOIC package The MIC5280 has an operating junction temperature range of 40C to +125C and is available in an adjustable output voltage version in a lead-free (RoHS compliant) 8- Applications pin EPAD SOIC packaging. Industrial applications Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Remote keyless entry power supply Telecom applications Off-line power supplies Typical Application Telecom Application Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5280 Ordering Information Part Number Voltage Temperature Range Package Lead Finish MIC5280YME Adj. 40 to +125C 8-Pin EPAD SOIC Pb-Free Pin Configuration CBYP 1 8 VIN VOUT 2 7 NC ADJ 3 6 NC GND 4 5 EN 8-Pin EPAD SOIC (ME) Pin Description Pin Number Pin Name Pin Function 1 CBYP Connect 10F capacitor. Increases PSRR when VIN 6.5V. 2 VOUT Regulator Output Pin. Connect 2.2F for better stable operation. 3 ADJ Connect pin 3 to external resistor divider to set VOUT. 4 GND Ground. 5 EN Enable pin. Enable Low turns part OFF, Enable High turns part ON. 6, 7 NC Not internally connected. 8 VIN Supply Input pin. Supply (Input): -24V to 120V input voltage. EP Exposed Pad Connect to Ground plane trace. M9999-012209-A January 2009 2