MIC5280 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – 25mA, 120V, Low IQ, High PSRR LDO

MIC5280
25mA, 120V, Low I_Q, High PSRR LDO
General Description
Features
The MIC5280 is a high performance low dropout regulator,
offering a very low noise output with a very wide input
voltage operating range, up to 120V DC input voltage.
Ideal for high input voltage applications such as industrial
and telecom, the MIC5280 offers 2% initial accuracy,
extremely high power supply rejection ratio (PSRR >
80dB) and low ground current (typically 31µA). The
MIC5280 can also be put into a zero-off-mode current
state, drawing a minuscule amount of current when
disabled.
The MIC5280 has a very wide input voltage range, with a
DC rating from –24V to 120V. The MIC5280 is optimized
for line transient response, making it ideal for harsh
environment applications.
• Wide input voltage range: 4.5V to 120V DC
• Very low quiescent current: 31µA typical
• 25mA guaranteed output current
• Adjustable output from 1.215V to 5V
• DC voltage protection down to -24V
• Ability to withstand up to +120V DC at the input
• Stable with ceramic output capacitors
• Ultra High PSRR > 80dB for RF applications
• High output accuracy
– ± 2% initial accuracy
– ± 3% over temperature (–40°C to +125°C)
• Thermal shutdown and current limit protection
The MIC5280 has an operating junction temperature range
of –40°C to +125°C and is available in an adjustable
output voltage version in a lead-free (RoHS compliant) 8-
pin EPAD SOIC packaging.
• Thermally efficient 8-pin EPAD SOIC package
Applications
Data sheets and support documentation can be found on ^{• Industrial applications}
Micrel’s 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 [phone] • fax + 1 [phone] • http://www.micrel.com
January 2009
M9999-012209-A