MIC5190

Micrel

MIC5190

Ultra High-Speed, High-Current Active Filter/LDO Controller

General Description

The MIC5190 is an ultra high-speed linear regulator. It uses

an external N-Channel FET as its power device.

The MIC5190 offers ultra high-speed to cope with the fast

load demands of microprocessor cores, ASICs, and other

high-speed devices. Signal bandwidths of greater than 500kHz

can be achieved with a minimum amount of capacitance

while at the same time keeping the output voltage clean,

regardless of load demand. A powerful output driver delivers

large MOSFETs into their linear regions, achieving ultra-low

dropout voltage.

1.25V

a large amount of capacitance.

MIC5190 (0.5V reference) is optimized for output voltages of

below 1.0V.

The MIC5190 is offered in 10-lead 3mm

× 3mm MLF™ and

10-lead MSOP-10 packages and has an operating junction

temperature range of –40

°C to +125°C.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Typical Application

Features

• Input voltage range:

V

• +1.0% initial output tolerance

• Dropout down to 25mV@10A

• Filters out switching frequency noise on input

• Very high large signal bandwidth >500kHz

• PSRR >40dB at 500kHz

• Adjustable output voltage down to 0.5V

• Stable with any output capacitor

• Excellent line and load regulation specifications

• Logic controlled shutdown

• Current limit protection

•3mm

× 3mm 10-lead MLF™ and MSOP-10 packages

• Available –40

°C to +125°C junction temperature

Applications

• Distributed power supplies

• ASIC power supplies

• DSP,

µP, and µC power supplies

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.

PowerPAK is a trademark of Siliconix, Inc.

VIN

SGND

PGND

IS

IR3716S

OUT

VCC1

R1

100Ω

C3

0.01

µF

C2

10

µF

R2

125Ω

FB

GND

GND

VCC2

EN

COMP

MIC5190

R3

12.5kΩ

C1

0.01

µF

December 2005

1

M9999-120105