MIC5190
Micrel
MIC5190
Ultra High-Speed, High-Current Active Filter/LDO Controller
Features
General Description
• Input voltage range:
The MIC5190 is an ultra high-speed linear regulator. It uses
an external N-Channel FET as its power device.
V
= 0.9V to 5.5V
IN
• +1.0% initial output tolerance
• Dropout down to 25mV@10A
The MIC5190 offers ultra high-speed to cope with the fast
load demands of microprocessor cores, ASICs, and other
high-speeddevices.Signalbandwidthsofgreaterthan500kHz
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.
• 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
1.25V ±10% can be turned into 0.9V ±1% without the use of
IN
a large amount of capacitance.
• 3mm × 3mm 10-lead MLF™ and MSOP-10 packages
• Available –40°C to +125°C junction temperature
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.
Applications
• Distributed power supplies
• ASIC power supplies
All support documentation can be found on Micrel’s web
site at www.micrel.com.
• DSP, µP, and µC power supplies
Typical Application
VCC = 12V
C1
0.01µF
VIN =1.2V
VOUT = 0.9V@7A
IR3716S
MIC5190
IS
OUT
R1
100Ω
VIN
VCC1
VCC2
EN
FB
C2
10µF
R2
125Ω
PGND
SGND
C3
0.01µF
COMP
R3
12.5kΩ
GND
GND
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
PowerPAK is a trademark of Siliconix, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-120105
December 2005
1
MICREL [ MICREL SEMICONDUCTOR ]
