MAQ5280

Automotive

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

October 2008

M9999-102708-B

General Description

The MAQ5280 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

automotive and telecom, the MAQ5280 offers 2% initial

accuracy, extremely high power supply rejection ratio

(PSRR > 80dB) and low ground current (typically 31µA).

The MAQ5280 can also be put into a zero-off-mode

current state, drawing a minuscule amount of current when

disabled.

The MAQ5280 has a very wide input voltage range, with a

DC rating from –24V to 120V. This wide input range

covers the automotive load dump range and the MAQ5280

is optimized for line transient response, making it ideal for

harsh environment applications.

The MAQ5280 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. This part is also AEC-Q100

Qualified for automotive applications.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 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

• Thermally efficient 8-pin EPAD SOIC package

• AEC-Q100 qualified

Applications

• Automotive Systems

• Industrial Applications

• Remote Keyless Entry Power Supply

• Telecom Applications

• Off-line Power Supplies

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Typical Application

Automotive Application