MIC5333 Evaluation Board Micro-Power High Performance Dual 300mA ULDO™ with Dual POR resistance can reduce the voltage supplied to the input so monitor the supply voltage at the VIN terminal. General Description The MIC5333 is a tiny dual output, low quiescent current LDO. The MIC5333 provides two high performance 300mA LDOs, with a POR generator for each LDO output into a 2.5mm x 2.5mm Thin MLF® package. The MIC5333 dual Ultra Low Dropout (ULDO™) linear regulator is easy to use. A small output capacitance of only 1µF for each of the outputs is required. An input capacitor may be required when the power supply is more than 4” away from the device. The evaluation board includes an input capacitor of 1µF to compensate for long inductive test leads. 2. Enable/Disable the MIC5333. The evaluation board has both of the enable pins (EN1 and EN2) connected to pin terminals and must be tied to either VIN or GND with jumper wires for proper operation. To enable an output, jumper the EN terminal (J6 for LDO1, J5 for LDO2) to VIN (J1). To disable an output, jumper the EN terminal to the GND terminal (J2 or J9). Leaving the enable pins floating will cause the regulators to operate in an indeterminate state. Requirements The MIC5333 evaluation board requires an input power source that is able to deliver at least 600mA at a voltage within the range of 2.3V to 5.5V. The output load can be either active or passive. 3. Connect the loads to the VOUT terminals (J8 for LDO1, J7 for LDO2) and ground terminal (J10). The load can be either passive (resistor) or active (electronic load). Be sure to monitor the output voltage at the VOUT (J7 and J8) terminals. Precautions The evaluation board does not have reverse polarity protection. Applying a negative voltage to the VIN terminal may damage the device. The MIC5333 evaluation board is tailored for a Li-Ion range input supply voltage. It should not exceed 5.5V on the input. Getting Started 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 (2.3V ≤ VIN ≤ 5.5V). An ammeter may be placed between the input supply and the VIN terminal to the evaluation board to accurately monitor the input current. The ammeter and/or power lead 4. Power on Reset. Connect an oscilloscope to the POR terminal (J4 for POR1, or J3 for POR2) and ground terminal (J2, J9 or J10). The evaluation board has a 0.1µF capacitors connected from the CSET pins to GND. This corresponds to a delay of 100ms on the POR1 and POR2 outputs. The POR delay time can be modified by changing the value of C2 for POR1 and C3 for POR2 with a rate of 1s/µF, or removing the capacitors for zero delay. Ordering Information Part Number Description MIC5333-XXYMT EV Evaluation board with the 300mA Dual ULDO™ with Dual POR device ULDO is a trademark of Micrel, Inc. 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 2008 M9999-030408-A Micrel, Inc. MIC5333 Evaluation Board Evaluation Board Schematic U1 MIC5333-xxYMT VIN J1 VIN 1 10 J8 VOUT1 9 J7 VOUT2 VIN VOUT1 POR2 VOUT2 POR1 CSET2 8 EN2 CSET1 7 R2 R1 100k 100k 3 J3 - POR2 4 J4 - POR1 5 J5 - EN2 6 J6 - EN1 EN1 GND C1 1µF C2 0.1µF 2 C3 0.1µF C5 1µF C4 1µF J10 GND J2 - GND J9 - GND Bill of Materials Item Part Number Manufacturer (1) Qty C1, C4, C5 C1608X5R0J105K Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 3 C2, C3 VJ0603Y104KXXAT Vishay(2) Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603 2 R1, R2 CRCW06031003FRT1 Vishay(2) Resistor, 100kΩ, 1%, 1/16W, Size 0603 U1 MIC5333-XXYMT TDK Description Micrel (3) 2 ® UCAP LDO, Dual 300mA with dual POR, 2.5mm x 2.5mm Thin MLF 1 Notes: 1. TDK: www.tdk.com 2. Vishay: www.vishay.com 3. Micrel, Inc.: www.micrel.com March 2008 2 M9999-030408-A Micrel, Inc. MIC5333 Evaluation Board PCB Layout Recommendations 1120 (mil) 1200 (mil) Top Layer 1120 (mil) 1200 (mil) Bottom Layer March 2008 3 M9999-030408-A Micrel, Inc. MIC5333 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. © 2007 Micrel, Incorporated. March 2008 4 M9999-030408-A