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MIC5191 Datasheet

  • MIC5191

  • Micrel Semiconductor [Ultra High-Speed, High-Current Active...

  • 183.51KB

  • MICREL

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MIC5191
Micrel
MIC5191
Ultra High-Speed, High-Current Active Filter/LDO Controller
General Description
The MIC5191 is an ultra high-speed linear regulator. It uses
an external N-Channel FET as its power device.
The MIC5191's ultra high-speed abilities can handle 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
卤10%
can be turned into 1V
卤1%
without the use of
a large amount of capacitance.
MIC5191 (1.0V reference) is optimized for output voltages of
1.0V and higher.
The MIC5191 is offered in 10-lead 3mm
脳
3mm MLF鈩?and
10-lead MSOP-10 packages and has an operating junction
temperature range of 鈥?0掳C to +125掳C.
All support documentation can be found on Micrel鈥檚 web
site at www.micrel.com.
Features
鈥?Input voltage range:
V
IN
= 1.0V to 5.5V
鈥?+1.0% initial output tolerance
鈥?/div>
Dropout down to 25mV@10A
鈥?Filters out switching frequency noise on input
鈥?/div>
Very high large signal bandwidth >500kHz
鈥?PSRR >40dB at 500kHz
鈥?Adjustable output voltage down to 1.0V
鈥?Stable with any output capacitor
鈥?Excellent line and load regulation specifications
鈥?Logic controlled shutdown
鈥?Current limit protection
鈥?10-lead MLF鈩?and MSOP-10 packages
鈥?Available 鈥?0掳C to +125掳C junction temperature
Applications
鈥?Distributed power supplies
鈥?ASIC power supplies
鈥?DSP,
碌P,
and
碌C
power supplies
Typical Application
V
CC
= 12V
C1
0.01碌F
V
IN
= 1.2V
MIC5191
IS
VIN
VCC1
VCC2
PGND
EN
C3
0.01碌F
COMP
R3
12.5k鈩?/div>
SGND
FB
OUT
IR3716S
V
OUT
=1.0V@7A
C2
10碌F
GND
GND
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
PowerPAK is a trademark of Siliconix, Inc.
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 474-1000 鈥?http://www.micrel.com
April 2004
1
M9999-042804

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