400kHz ePAD MSOP Synchronous Buck Controller MIC2159 high-efficie

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400kHz ePAD MSOP Synchronous Buck Controller MIC2159 high-efficie

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MIC2159 Evaluation Board
400kHz ePAD MSOP Synchronous Buck Controller
MIC2159 high-efficiency, simple 400kHz synchronous buck control housed small ePAD MSOP-10 package. MIC2159 allows compact DC-to-DC solutions with minimal external component count cost. output voltage precisely regulated down 0.8V. adaptive N-Channel MOSFET drive scheme allows efficiencies more than across wide load range. Data sheets support documentation found Micrel's site www.micrel.com. Requirements MIC2159 evaluation board requires input power source that able deliver greater than 12V. Precautions evaluation board does have reverse polarity protection. Applying negative voltage I/P1 terminal damage device. MIC2159 evaluation board tailored input voltage range. input voltage range should exceed 14.5V input. Getting Started Connect external supply VIN. Apply desired input voltage I/P1 ground terminals evaluation board, paying careful attention polarity supply voltage (5VVIN12V). ammeter placed between input supply terminal evaluation board. Ensure that supply voltage monitored terminal. ammeter and/or power lead resistance reduce voltage supplied input. Enabling MIC2159. MIC2159 enabled soon power supply with voltage range 14.5V connected across I/P1and terminals. Adjusting Output Voltage Output Voltage selected changing link voltage selector header JP1. voltage options 1.2V, 1.8V, 2.5V. link selected left open then output voltage default 0.8V. output voltage MIC2159 evaluation board still adjustable. output voltage controlled R11, R12, feedback resistors. example, takes R11, output voltage calculated follows:
VOUT VREF
evaluation board initially adjusted 1.2V, easily modified removing replacing with value that yields desired output voltage. resistor recommended 3k-to-10k resistor range.
0.8V 0.8V
Ensure output voltage selected does exceed since tantalum output capacitor 6.3V voltage rating. Typically, working voltage tantalum capacitors should never exceed their rated voltage value. When output voltages greater than desired, output capacitor should replaced with where output voltage less than output capacitor voltage rating (tantalum capacitors).
Ordering Information
Part Number MIC2159YMME Description Evaluation board with MIC2159YMME device
Micrel Inc. 2180 Fortune Drive Jose, 95131 (408) 944-0800 (408) 474-1000 http://www.micrel.com
October 2007
M9999-103007-A
Micrel, Inc. Board Performance
MIC2159 Evaluation Board
3.3V Efficiency
OUTPUT CURRENT
1.2V Efficiency
OUTPUT CURRENT
October 2007
M9999-103007-A
Micrel, Inc.
MIC2159 Evaluation Board
I/P1
TPSD686M020R0070
+VIN
68µF/20V
68µV
68µF
2Pin 0.1µF/25V 10µF/6V Si7348DP 10µF Ceramic
SD103BWS
MIC2159YMM
Cp/EN Cp/EN
0.1µF/25V Si7348DP PROBE1 CEP125-0R8NC-UD 0.8µH
COUT TPSD337M006R0045 10µF/ 6.3V PROBE-T
O/P1
330µF Si7348DP B340A Si7368DP
330µF 100nF
2Pin
0.1µF Open 4.02k
40.2k
14.7k
Open 6.98k 2.5V 11.8k 1.8V 29.4k 1.2V
HEADER
MIC2159 Schematic
October 2007
M9999-103007-A
Micrel, Inc.
MIC2159 Evaluation Board
Bill Materials
Item C14, C15,
Notes: Vishay: www.vishay.com AVX: www.avx.com TDK: www.tdk.com Murata: www.murata.com Diodes, Inc.: www.diodes.com Sumida: www.sumida.com Infineon: www.infineon.com Micrel, Inc.: www.micrel.com
Part Number TR3D686K020E115 TPSD686M020R0070 C3216X7R1C106M 1206YC106MAT2A GRM31R61C106M VJ0603Y104KXXAT TR3D337M6R3C0045 TR3D337M6R3E0045 594D337K06R3D2T TPSD337M006R0045 VJ0805Y224KXXAT VJ0603A221KXXAT VJ0603A102KXXAT SD103AWSV-GS08 SL04-GS08 1N5819HW CDEP147NP-1R2MC-73 CRCW06034R99FRT1 CRCW06031001FRT1 CRCW08050000FRT1 CRCW06034022FRT1 CRCW06035111FRT1 CRCW08051R40FRT1 CRCW06031002FRT1 CRCW06034990FRT1 CRCW06034701FRT1 CRCW06038061FRT1 CRCW06032002FRT1 BSC048N025S BSC048N025S Si7866DP MIC2159-YMME
Manufacturer Vishay Sprague(1) AVX(2) TDK(3) AVX(2) Murata(4) Vishay Vitramon(1) Vishay Vitramon(1) Vishay Vitramon(1) Vishay Vitramon(1) Vishay Vitramon(1) Vishay Vitramon(1) Vishay Vitramon(1) Vishay(1) Vishay(1) Diodes, Sumida Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Vishay Dale(1) Infineon(7) Infineon(7) Vishay Siliconix(1) Micrel, Inc.(8)
Description 68µF/20V CASE 10µF/16V, Ceramic Capacitor 0.1µF/25V Ceramic Capacitor 330µF/6.3V, case 0.22µF/25V, 0805 220pF/25V 1nF/25V OPEN Schottky Diode Schottky Diode 1.2µH, 35A@20°C Inductor 4.99, 0603, 1/16W, 1.0k 0603, Resistor 0805, Resistor 40.2k 0603, Resistor 5.11k 0603, Resistor 1.4, 0805 1/10W, 0603, Resistor 499, 0603, 1/16W, OPEN 4.70k 0603, Resistor 8.06k, 0603, Resistor 0603, Resistor CHANNEL MOSFET OPEN OPEN 400kHz ePAD MSOP Synchronous Buck Controller
Qty.
October 2007
M9999-103007-A
Micrel, Inc.
MIC2159 Evaluation Board
Layout Recommendations
Layer with Silkscreen
Bottom Layer with Silkscreen
October 2007
M9999-103007-A
Micrel, Inc.
MIC2159 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. 2007 Micrel, Incorporated.
October 2007
M9999-103007-A

400kHz ePAD MSOP Synchronous Buck Controller MIC2159 high-efficie

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