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
IN
±10%
can be turned into 0.9V
±1%
without the use of
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.
Features
• Input voltage range:
V
IN
= 0.9V to 5.5V
• +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
Typical Application
V
CC
= 12V
C1
0.01µF
V
IN
=1.2V
MIC5190
IS
VIN
VCC1
VCC2
PGND
EN
C3
0.01µF
COMP
R3
12.5kΩ
SGND
FB
OUT
IR3716S
V
OUT
= 0.9V@7A
R1
100Ω
C2
10µF
R2
125Ω
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
December 2005
1
M9999-120105
MICREL [ MICREL SEMICONDUCTOR ]
