MIC5332 Evaluation Board Micro-Power High Performance Dual 300mA ULDO™ voltage is monitored at the VIN terminal, as the ammeter and/or power lead resistance can reduce the voltage supplied to the input. General Description The MIC5332 is a tiny dual low quiescent current LDO. The MIC5332 provides two high performance 300mA LDOs, and a POR generator into a 2mm x 2mm Thin MLF® package. The MIC5332 dual Ultra Low Dropout (ULDO™) linear regulator is easy to use. A minimum output capacitance of 1µF for each of the outputs is required. An input capacitor is required when the power supply is more than 4-inches away from the device. The evaluation board includes an input capacitor of 1µF to allow for long inductive test leads. 2. Enable/Disable the MIC5332. The evaluation board is provided with 10k pull up resistors on both of the enable pins (EN1 and EN2) to VIN. To disable an output, simply jumper the EN terminal (J5 for LDO1, J4 for LDO2) to the GND terminal (J2). The enable pins must be either pulled high or low. Removing the pull up resistors and leaving the pins floating will cause the regulators to operate in an indeterminate state. 3. Connect the loads to the VOUT terminals (J6 for LDO1, J8 for LDO2) and ground terminal (J7). The load can be either a passive (resistor) or active (electronic load). Be sure to monitor the output voltage at the VOUT (J6 and J8) terminals. Requirements The MIC5332 evaluation board requires an input power source that is able to deliver greater than 600mA with an input voltage range of 2.3V to 5.5V. The output load can be either an active or passive load. Precautions The evaluation board does not have reverse polarity protection. Applying a negative voltage to the VIN terminal may damage the device. The MIC5332 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. Ensure that the supply 4. Monitoring Power on Reset. Connect an oscilloscope to the POR2 terminal (J3) and ground terminal (J7). The evaluation board has a 0.1µF capacitor connected from the CSET2 pin-to-GND. This corresponds to a delay of 100ms on the POR2 output. The POR2 delay time can be modified by changing the value of C4 with a rate of 1s/µF, or removing C4 for zero delay. Ordering Information Part Number Description MIC5332-XXYMT EV Evaluation board with the 300mA Dual ULDO™ 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 January 2008 M9999-012408-A Micrel, Inc. MIC5332 Evaluation Board Evaluation Board Schematic U1 MIC5332-xxYMT VIN J1 VIN 1 R3 10k J3 POR J4 EN2 R2 10k VOUT1 POR2 VOUT2 8 J6 VOUT1 7 J8 VOUT2 R1 10k 3 4 J5 EN1 VIN 5 EN2 EN1 CSET2 GND C1 1µF 6 C4 0.1µF 2 C2 1µF C3 1µF J2 GND J7 GND Bill of Materials Item Part Number Manufacturer C1, C2, C3 C1608X5R0J105K TDK(1) C4 R1, R2, R3 U1 VJ0603Y104KXXAT CRCW06031002FKEYE3 MIC5332-XXYMT Qty 3 (2) Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603 1 (2) Resistor, 10kΩ, 1%, 1/16W, Size 0603 Vishay Vishay Micrel Description Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 (3) 3 ® UCAP LDO, Dual 300mA, Size 2mm x 2mm Thin MLF 1 Notes: 1. TDK: www.tdk.com 2. Vishay: www.vishay.com 3. Micrel, Inc.: www.micrel.com January 2008 2 M9999-012408-A Micrel, Inc. MIC5332 Evaluation Board PCB Layout Recommendations 1350 (mil) 1400 (mil) Top Layer 1350 (mil) 1400 (mil) Bottom Layer January 2008 3 M9999-012408-A Micrel, Inc. MIC5332 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. January 2008 4 M9999-012408-A