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
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M9999-120105
MIC5190
Micrel
Ordering Information
FB
Output Output
Part Number
Voltage Current Voltage
Standard
Pb-Free
MIC5190BML MIC5190YML
0.5V
ADJ
ADJ
MIC5190BMM MIC5190YMM
0.5V
ADJ
ADJ
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
Package
10-pin MLF™
MSOP-10
Pin Configuration
VIN 1
FB 2
SGND 3
VCC1 4
COMP 5
10 IS
9 PGND
8 OUT
7 VCC2
6 EN
VIN 1
FB 2
SGND 3
VCC1 4
COMP 5
10 IS
9 PGND
8 OUT
7 VCC2
6 EN
MLF™-10 (ML)
MSOP-10 (MM)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
Pin Name
VIN
FB
SGND
VCC1
COMP
EN
VCC2
OUT
PGND
IS
Pin Function
Input voltage (Current Sense +).
Feedback input to error amplifier.
Signal ground.
Supply to the internal voltage regulator.
Error amplifier output for external compensation.
Enable (Input): CMOS-compatible.
Logic high = Enable, Logic low = Shutdown. Do not float pin.
Power to output driver.
Output drive to gate of power MOSFET.
Power ground.
Current sense.
December 2005
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M9999-120105
MIC5190
Micrel
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .................................................. +6.0V
Enable Input Voltage (V
EN
) ......................................... +14V
V
CC
1, V
CC
2 ............................................................... +14V
Junction Temperature (T
J
) ................ –40°C
≤
T
J
≤
+125°C
ESD .........................................................................
Note 2
Operating Ratings
(3)
Supply Voltage (V
IN
) ................................... +0.9V to +5.5V
Enable Input Voltage (V
EN
) ................................. 0V to V
CC
V
CC
1,V
CC
2 ............................................... +4.5V to +13.2V
Junction Temperature (T
J
) ................ –40°C
≤
T
J
≤
+125°C
Package Thermal Resistance
MLF™
(θ
JA
)
(4)
..................................................... 60°C/W
MSOP
(θ
JA
)
(5) ..............................................................
200°C/W
Electrical Characteristics
(6)
T
A
= 25°C with V
IN
= 1.2V, V
CC
= 12V, V
OUT
= 0.5V;
bold
values indicate –40°C < T
J
< +125°C; unless otherwise specified.
Parameter
Output Voltage Accuracy
Condition
At 25°C
Over temperature range
Output Voltage Line Regulation
Feedback Voltage
Output Voltage Load Regulation
VCC Pin Current (V
CC
1 + V
CC
2)
VCC Pin Current (V
CC
1 + V
CC
2)
VIN Pin Current
FB Bias Current
Current Limit Threshold
Start-up Time
Enable Input Threshold
V
EN
= V
IN
Regulator enable
Regulator shutdown
Enable Hysteresis
Enable Pin Input Current
V
IL
< 0.2V (Regulator shutdown)
V
IH
> 0.8V (Regulator enabled)
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
3. The device is not guaranteed to function outside its operating ratings.
4. Per JESD 51-5 (1S2P Direct Attach Method).
5. Per JESD 51-3 (1S0P).
6. Specification for packaged product only.
Min
–1
–2
–0.1
0.495
Typ
Max
+1
+2
Units
%
%
%/V
V
%
µA
V
IN
= 1.2V to 5.5V
I
L
= 10mA to 1A
Enable = 0V
Enable = 5V
Current from V
IN
0.005
0.5
0.02
40
15
10
13
+0.1
0.505
0.5
20
15
30
70
100
mA
µA
µA
mV
µs
V
35
50
25
0.8
0.6
0.5
100
100
100
0.2
V
mV
nA
nA
December 2005
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M9999-120105
Microchip MCU
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