MIC5387 Evaluation Board Ultra-Small Triple 150mA Output LDO General Description Getting Started The MIC5387 is an advanced, general purpose tripleoutput, linear regulator offering high power supply rejection (PSRR) in an ultra-small 6 pin 1.6mm x 1.6mm Thin MLF® package. The MIC5387 is capable of 150mA from each output and offers high PSRR, making it an ideal solution for any portable electronic application. Ideal for battery powered applications, the MIC5387 offers 2% initial accuracy, low dropout voltage (180mV @ 150mA), and low ground current (typically 32µA per output). The MIC5387 is available in a lead-free (RoHS compliant) 1.6mm x 1.6mm 6 pin Thin MLF® occupying only 2.56mm2 of PCB area, a 36% reduction in board area compared to a 2mm x 2mm Thin MLF® package. An input capacitor is required when the power supply is more than four inches from the device. The evaluation board includes an input capacitor of 10µF to compensate for long inductive test leads. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. • Connect an External Supply to VIN. Apply the desired input voltage to the VIN (J1) and ground (J2) terminal of the evaluation board, paying careful attention to polarity and supply voltage (2.5V ≤ VIN ≤ 5.5V). An ammeter can be placed between the input supply and the VIN terminal of 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. • Enable/Disable the MIC5387. To enable the MIC5387 jumper the enable terminal (J3 for LDO2 and LDO3) to VIN. LDO1 does not have an enable pin and is always enabled when VIN is above the UVLO threshold. To disable outputs 2 and 3, simply remove the jumper from the EN2/3 terminal. The enable pin must be either pulled high or low. Leaving the pin floating will cause the regulator to operate in an indeterminate state. The evaluation board is supplied with 100KΩ pull-down resistor on the EN2/3 pin for default off state of LDO2 and LDO3. • Connect the Load. Connect the loads to the VOUT Terminals (J4 for LDO1, J6 for LDO2 and J8 for LDO3) and Ground Terminals (J5, J7, or J9). The loads can be either passive (resistor) or active (electronic load). Be sure to monitor the output voltage at the VOUT (J5, J7 and J9) terminals. Requirements The MIC5387 evaluation board requires an input power supply that is capable of delivering a minimum 600mA at a voltage range of 2.5V to 5.5V. The output load can be either active or passive. Precautions The MIC5387 evaluation board does not have reverse polarity protection. Applying a negative voltage to the VIN terminal may damage the device. Ordering Information Part Number Description MIC5387-SGFYMT EV Triple-Output LDO Evaluation Board. VOUT1 = 3.3V, VOUT2 = 1.8V, VOUT3 = 1.5V. MIC5387-SG4YMT EV Triple-Output LDO Evaluation Board. VOUT1 = 3.3V, VOUT2 = 1.8V, VOUT3 = 1.2V. MIC5387-GMGYMT EV Triple-Output LDO Evaluation Board. VOUT1 = 1.8V, VOUT2 = 2.8V, VOUT3 = 1.8V. MIC5387-GMMYMT EV Triple-Output LDO Evaluation Board. VOUT1 = 1.8V, VOUT2 = 2.8V, VOUT3 = 2.8V. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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 May 2010 M9999-052510-A Micrel, Inc. MIC5387 Evaluation Board Evaluation Board Schematic Bill of Materials Item C1 Part Number C1608X5R0J106K GRM155R1A1055KE19D C2, C3, C4 0402ZD105KAT2A LMK105BJ105KV-F R1, R2, R3 U1 CRCW0402100KFKEA MIC5387-xxxYMT Manufacturer TDK (1) Qty. 10μF, Ceramic, 6.3V, X5R, Size 0603 Capacitor (2) Murata 1 1μF, Ceramic, 10V, X5R, Size 0402 Capacitor (3) AVX 1μF, Ceramic, 10V, X5R, Size 0402 Capacitor Taiyo Yuden(4) Vishay(5) Micrel, Inc. Description (6) 3 1μF, Ceramic, 10V, X5R, Size 0402 Capacitor 100KΩ, 1%, 1/16W, Size 0402 Resistor 3 High-Performance, Triple-Output, 150mA LDO 1 Notes: 1. TDK: www.tdk.com. 2. Murata: www.murata.com. 3. AVX: www.avx.com. 4. Taiyo Yuden: www.t-Yuden.com. 5. Vishay: www.vishay.com. 6. Micrel, Inc.: www.micrel.com May 2010 2 M9999-052510-A Micrel, Inc. MIC5387 Evaluation Board PCB Layout Recommendations Top Layer Bottom Layer May 2010 3 M9999-052510-A Micrel, Inc. MIC5387 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. © 2010 Micrel, Incorporated. May 2010 4 M9999-052510-A