This evaluation board used evaluate both MIC5190 MIC5191 high speed LD

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This evaluation board used evaluate both MIC5190 MIC5191 high speed LD

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High-Speed N-Channel Controller MIC5190/91 Evaluation Board
This evaluation board used evaluate both MIC5190 MIC5191 high speed LDO's. MIC5190/1 linear controllers that require external N-Channel MOSFET operation. This allows device tailored application. This evaluation board features very RDS(ON) MOSFET that handle with airflow. dropout voltages (VIN VOUT), this evaluation board deliver current. MIC5190 used voltages less than MIC5191 applications greater than 1Vout.
Requirements
MIC5190/1 evaluation board requires input supply voltages. power supply VIN, which also connected drain N-Channel MOSFET must able deliver amount load current required. operating range supply 5.5V, must also higher voltage than output voltage plus dropout voltage. second supply, VCC, operating range from 13.2V. supplies gate drive MOSFET, therefore voltage must also greater than MOSFETs gate source threshold required regulation.
current limit paragraph. Connect external supply -Apply desired input voltage ground terminals evaluation board, paying careful attention polarity supply voltage (4.5V<VIN<13.2V). Ensure supply voltage monitored terminal. Connect load VOUT ground terminals- load either passive (resistive) active electronic load). ammeter placed between load VOUT terminal. Ensure output voltage monitored VOUT terminal. default output voltage 0.9V MIC5190 1.2V MIC5191. This adjusted changing feedback resistors. (see next paragraph Output Voltage) Enable MIC5190/1 Apply 0.8V greater voltage source enable pin. Alternatively, device enabled tying either enable.
Output Voltage
output voltage MIC5190/1 evaluation board adjustable. output voltage controlled feedback resistors calculated follows: VOUT VREF( VREF equal 0.5V MIC5190 MIC5191.The evaluation board initially adjusted 0.9V (MIC5190) 1.2V (MIC5191), easily modified removing replacing with value that yields desired output voltage. [Removing sets output 0.5V (MIC5190) (MIC5191).]
VOUT VREF
Precautions
evaluation board does have reverse polarity protection. Applying negative voltage terminal damage device. Exceeding also damage device.
Getting Started
Connect external supply -Apply desired input voltage ground terminals evaluation board, paying careful attention polarity supply voltage (0.9V<VIN<5.5V). Ensure supply voltage monitored terminal. ammeter and/or power supply lead resistance reduce voltage supplied input. Since default configuration both ISENSE pins together, MIC5190/1 evaluation board offers current limit protection. Ensure supply current limited prevent damage short circuit conditions. cases where current limit desired refer
Power, Connect Protect trademark Micrel, Inc.
Micrel, Inc. 2180 Fortune Drive Jose 95131 (408) 944-0800 (408) 474-1000 http://www.micrel.com
November 2004
M9999-110204 (408) 955-1690
Micrel
MIC5190/91 Evaluation Board
Current Limit
default configuration MIC5190/1 evaluation board bypass current limit tying ISENSE VIN. cases where current limiting from MIC5190/1 required, board shown Figure sense resistor placed across board. required RSENSE value calculated follows: 50mV RSENSE ILIMIT
November 2004
M9999-110204 (408) 955-1690
Micrel
MIC5190/91 Evaluation Board
Evaluation Board Schematic
MIC5190/91 Evaluation Board Schematic
Bill Materials
Item C1a, Part Number C3225X5R0J226M 1206D226MAT GRM31CR60J226KE19L C1d, open C3216X7R1C475 12063D475MAT GRM31CR61C475KA01L (MIC5190) (MIC5191)
Notes: Semiconductor Tel: 800-344-3860 Micro Commercial Corp. Tel: 800-346-3371 Sumida Tel: 408-982-9660 Murata Tel: 949-916-4000 Vishay Tel: 402-644-4218 Micrel Semiconductor Tel: 408-944-0800
Manufacturer Murata Murata Murata Kyocera Vitramon Vishay Vishay Vishay Vishay Vishay MICREL
Description 22µF/6.3V 1206 22µF/6.3V 1206 22µF/6.3V 1206 4.7µF/16V 1206 4.7µF/16V 1206 4.7µF/16V 1206 10µF/6.3V 0805 10µF/6.3V 0805 0.01µF/25V 1/10W 0805 1/10W 0805
Qty.
GRM31MR06J106KE19L CM21X5R106M06AT VJ0805Y103KXXAT CRCW08051000FRT1 CRCW08051240FRT1 CRCW08054990FRT1 CRCW08051000FRT1 CRCW08051000FRT1 MIC5190BML MIC5191BML
1/10W 0805 1/10W 0805 1/10W 0805 High Speed N-channel
November 2004
M9999-110204 (408) 955-1690
Micrel
MIC5190/91 Evaluation Board
MICREL, INC. 2180 FORTUNE DRIVE JOSE, 95131
(408) 944-0800 (408) 474-1000 http:/www.micrel.com
information furnished Micrel this data sheet believed accurate reliable. However, responsibility assumed Micrel use. Micrel reserves right change circuitry specifications time without notification customer. Micrel Products designed authorized components life support appliances, devices systems where malfunction product reasonably expected result personal injury. Life support devices systems devices systems that intended surgical implant into body support sustain life, whose failure perform reasonably expected result significant injury user. Purchaser's sale Micrel Products life support appliances, devices systems Purchaser's risk Purchaser agrees fully indemnify Micrel damages resulting from such sale. 2004 Micrel, Incorporated.
November 2004
M9999-110204 (408) 955-1690

This evaluation board used evaluate both MIC5190 MIC5191 high speed LD

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