MIC2606YML-EV

MIC2605/6 Evaluation Board 1.2MHz / 2MHz PWM DC/DC Boost Switching Regulator General Description The MIC2605/6 is a 1.2MHz/2MHz, PWM DC/DC boost switching regulator available in a 2mm x 2mm MLF® package. High power density is achieved with the MIC2605/6 internal 40V/0.5A switch and 1Ω schottky diode, allowing it to power large loads in a tiny footprint. Requirements The MIC2605/6 evaluation board requires an input power source that is able to deliver greater than 500mA at 4.5V. Precautions The evaluation board does not have reverse polarity protection. Applying a negative voltage to the VIN (J1) terminal may damage the device. The MIC2605/6 evaluation board is tailored for a 4.5V to 20V input voltage range. The input voltage range should not exceed 20VDC on the input. Getting Started 1. Connect an external supply to the VIN. Apply desired input voltage to the VIN (J1) and ground (J2) terminals of the evaluation board, paying careful attention to polarity and supply voltage (4.5V≤VIN≤20.0V). An ammeter may be placed between the input supply and the VIN terminal to the evaluation board. Ensure that the supply voltage is monitored at the VIN terminal. The ammeter and/or power lead resistance can reduce the voltage supplied to the input. 2. Connect the load to the VOUT (J4) and ground (J5) terminals. The load can be either passive (resistor) or active (electronic load). An ammeter can be placed between the load and the VOUT terminal. The default output voltage is set to 32V. This can be adjusted by changing the feedback resistors. 3. Enabling the MIC2605/6. The MIC2605/6 has an enable pin connected to J3 terminal. A logic high 1.5V or greater will turn on the switching boost regulator and a logic low 0.3V or lower will shut down the switching boost regulator reducing the quiescent current to less than 0.1µA. Output Voltage The output voltage on the MIC2605/6 evaluation board is adjustable. The output voltage is controlled by the feedback resistors (R1 and R2) and can be calculated as follows: ⎛ R1 ⎞ VOUT = 1.25 V ⋅ ⎜ + 1⎟ ⎝ R2 ⎠ The evaluation board is initially adjusted to 32V, but can easily be modified by removing R1 and replacing it with the value that yields the desired output voltage. ⎞ ⎛V R1 = R2 ⋅ ⎜⎜ OUT − 1⎟⎟ ⎠ ⎝ 1.25V Ensure the output voltage selected does not exceed 40V rating of the output switch. Ordering Information Part Number Description MIC2605YML EV Evaluation board for the MIC2605YML device MIC2606YML EV Evaluation board for the MIC2606YML device Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com September 2008 M9999-092908-B Micrel, Inc. MIC2605/6 Evaluation Board Evaluation Board Schematic L1 10µH 1 2 U1 MIC2605/6YML J1 VIN 4.5V to 12V 2 C1 1µF/25V J2 GND J3 EN SW VOUT 4 R3 10k VIN FB VDD SS PGND 3 EN J4 VOUT 32V 1 R1 12.4k 6 C4 1µF/50V C5 N.U. 5 R2 C3 0.1µF/50V J5 GND 8 C2 0.1µF/50V 7 Bill of Materials Item Part Number C1608X5R1E105K C1 AVX(2) 08055D105MAT (2) 06035C104MAT GRM188R71C104KA01D VJ0603Y104KXAAT C3 06035C104MAT GRM188R71C104KA01D C4 08055D105MAT C5 N.U. L1 R1 R2 R3 TDK LQH43CN100K03 VLCF4020T-100MR85 Description Qty (1) 06033D105MAT VJ0603Y104KXAAT C2 Manufacture Capacitor, 1µF, 25V, X5R, Size 0603 AVX 1 Capacitor, 1µF, 50V , X5R, Size 0805 (3) Vishay Capacitor, 0.1µF, 50V, X7R, Size 0603 AVX(2) (4) Murata 1 Capacitor, 0.1µF, 16V , X7R, Size 0603 (3) Vishay Capacitor, 0.1µF, 50V, X7R, Size 0603 AVX(2) (4) Murata Capacitor, 0.1µF, 16V , X7R, Size 0603 (2) AVX Capacitor, 1µF, 50V , X5R, Size 0805 ----- 1 ----(4) Murata TDK 1 10uH, 0.65mA, DCR 240mΩ (1) 1 10uH, 0.85A-1.22A, DCR 120mΩ CRCW06031242FKEA Vishay Dale(3) Resistor, 12.4K, 1%, 1/16W, Size 0603 1 CRCW06034990FKEA Vishay Dale (3) Resistor, 499Ω, 1%, 1/16W, Size 0603 1 Vishay Dale (3) Resistor, 10k, 1%, 1/16W, Size 0603 1 0.5A, 1.2MHz / 2MHz Wide Input Range Integrated Switch Boost Regulator 1 CRCW060310K0FKEA U1 MIC2605/6YML Micrel, Inc.(5) Notes: 1. TDK: www.tdk.com 2. AVX: www.avx.com 3. Vishay: www.vishay.com 4. Murata: www.murata.com 5. Micrel, Inc.: www.micrel.com September 2008 2 M9999-092908-B Micrel, Inc. MIC2605 Evaluation Board PCB Layout Recommendations Top Layer Bottom Layer September 2008 3 M9999-092908-B Micrel, Inc. MIC2605 Evaluation Board MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2008 Micrel, Incorporated. September 2008 4 M9999-092908-B