MIC5380/1 Evaluation Board High Performance Dual 150mA LDO 1mm x 1mm Thin MLF® General Description Getting Started The MIC5380/1 is an advanced dual LDO ideal for powering general purpose portable devices. The MIC5380/1 provides two independently controlled, high performance 150mA LDOs in a tiny 1mm x 1mm Thin MLF® package. When the MIC5381 is disabled an internal resistive load is automatically applied to the output to discharge the output capacitor. Ideal for battery powered applications, the MIC5380/1 offers low dropout voltage 155mV@150mA and low ground current typically 32µA per LDO. An input capacitor may be required when the power supply is more than 4-inches from the device. The evaluation board includes an input capacitor of 10µF to compensate for long inductive test leads. Requirements The MIC5380/1 evaluation board requires an input power supply that is able to deliver at least 600mA at a voltage within the range of 2.5V to 5.5V. The output load can be either active or passive. Precautions The evaluation board does not have reverse polarity protection. Applying a negative voltage to the VIN terminal may damage the device. 1. Connect an external supply to VIN. Apply the desired input voltage to the VIN (J1) and ground terminal (J2) of the evaluation board, paying careful attention to polarity and supply voltage (2.5V ≤ VIN ≤ 5.5V). An ammeter may 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. 2. Enable/Disable the MIC5380/1. To enable the MIC5380/1 jumper the enable terminal (J7 for LDO1 and J8 for LDO2) to VIN. To disable the output, simply jumper the EN terminal (J7 for LDO1 and J8 for LDO2) to the GND terminal (J2). 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 100K pull-down resistors. 3. Connect the load to the VOUT terminals (J3 for LDO1 and J5 for LDO2) and ground terminal (J4, J6). The load can be either a passive (resistor) or active (electronic load). Be sure to monitor the output voltage at the VOUT (J3, J5) terminals. Ordering Information Part Number Description MIC5380-SSYFT EV 150mA High Performance Dual LDO VOUT1 = 3.3V, VOUT2 = 3.3V Evaluation Board MIC5380-PPYFT EV 150mA High Performance Dual LDO VOUT1 = 3.0V, VOUT2 = 3.0V Evaluation Board MIC5380-MGYFT EV 150mA High Performance Dual LDO VOUT1 = 2.8V, VOUT2 = 1.8V Evaluation Board MIC5380-M4YFT EV 150mA High Performance Dual LDO VOUT1 = 2.8V, VOUT2 = 1.2V Evaluation Board MIC5380-G4YFT EV 150mA High Performance Dual LDO VOUT1 = 1.8V, VOUT2 = 1.2V Evaluation Board MIC5381-SSYFT EV 150mA High Performance Dual LDO with auto discharge VOUT1 = 3.3V, VOUT2 = 3.3V Evaluation Board MIC5381-PPYFT EV 150mA High Performance Dual LDO with auto discharge VOUT1 = 3.0V, VOUT2 = 3.0V Evaluation Board MIC5381-MGYFT EV 150mA High Performance Dual LDO with auto discharge VOUT1 = 2.8V, VOUT2 = 1.8V Evaluation Board MIC5381-M4YFT EV 150mA High Performance Dual LDO with auto discharge VOUT1 = 2.8V, VOUT2 = 1.2V Evaluation Board MIC5381-G4YFT EV 150mA High Performance Dual LDO with auto discharge VOUT1 = 1.8V, VOUT2 = 1.2V Evaluation Board 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 March 2009 M9999-032309-A Micrel, Inc. MIC5380/1 Evaluation Board Evaluation Board Schematic Bill of Materials Item C1 Part Number C1608X5R0J106K GRM155R1A1055KE19D C2, C3 0402ZD105KAT2A LMK105BJ105KV-F R1, R2 CRCW0603100KFKEA MIC5380-xxYFT U1 MIC5381-xxYFT Manufacturer TDK (1) Qty. 10µF Ceramic, 6.3V, X5R, Size 0603 Capacitor Murata(2) 1 1µF Ceramic, 10V, X5R, Size 0402 Capacitor AVX(3) Taiyo Yuden Description 2 1µF Ceramic, 10V, X5R, Size 0402 Capacitor (4) Vishay(5) 1µF Ceramic, 10V, X5R, Size 0402 Capacitor 100K, 1%, 1/16W, Size 0603 Resistor 2 ® Micrel, Inc.(6) Dual, 150mA LDO, Size 1mm x 1mm Thin MLF Dual, 150mA LDO, with auto discharge 1mm x 1mm Thin MLF® 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. March 2009 2 M9999-032309-A Micrel, Inc. MIC5380/1 Evaluation Board PCB Layout Recommendations Top Layer Bottom Layer March 2009 3 M9999-032309-A Micrel, Inc. MIC5380/1 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. © 2009 Micrel, Incorporated. March 2009 4 M9999-032309-A