MIC95410 Evaluation Board 6.6m R , 7A, 5.5V Load Switch in DS(ON) IN 1.2mm x 2.0mm QFN Package General Description The MIC95410 is a high-side load switch used for The basic parameters of the MIC95410 evaluation board computing and for ultra-dense embedded computing are the IN supply of 1V to 5.5V and the separated bias boards where high-current, low-voltage rails from sub-1V voltage from 2.7V to 9V. It also includes a TTL-logic level to 5.5V have to be sectioned. The integrated 6.6m turn-on command (CTL) and an output discharge function R N-channel MOSFET ensures low voltage drop and when disabled. DS(ON) low power dissipation while delivering up to 7A of load Due to the optimized pinout of the MIC95410, the current. evaluation board can achieve a two-layer-only routing (top The MIC95410 provides user-adjustable slew-rate- and bottom), while internal planes are connected to GND controlled turn-on to limit the inrush current to the input and kept as solid GND planes for best thermal supply voltage. performance. See PCB Layout section. The MIC95410 is available in thermally efficient, space- MIC95410 datasheet and support documentation are saving 10-pin 1.2mm 2.0mm QFN package with 0.5mm available on Micrels web site at: www.micrel.com. pin pitch and an operating junction temperature range from Ordering Information 40 C to +125 C. Part Number Description MIC95410YFL EV MIC95410 Evaluation Board Evaluation Board Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC95410 Evaluation Board Getting Started Recommended Setup Recommended Steps The MIC95410 evaluation board setup comprises of the 1. Ensure no jumper is installed at J1. following points: R1 will pull down the CTL pin and keep the MIC95410 disabled until Step 8. A power supply with at least 7A of current capability for IN, not to exceed 5.5V. 2. Connect the VS supply. Connect the VS bias supply to terminals J2-2 (VS)/J2- A passive or active load which can handle up to 1 (GND). J2 is the connector at the bottom edge of the 7A at 5.5V, connected at OUT (CON3) / GND evaluation board. (CON4). Alternatively, VS can be shorted to IN by installing a A low-power bias supply for VS, 2.7V V 9V. VS jumper across positions J2-3 (IN) and J2-2 (VS). This A function generator for driving CTL. is possible only for 2.7V V 5.5V. If V is lower IN IN than 2.7V, an external independent bias supply for VS A digital multi-meter (DMM). is mandatory. The bias supply pin VS can be shorted to IN by means of 3. Connect the IN supply. the VS header located at the bottom of the board near the Connect the power supply to the IN (CON1) and GND label. In this case, evaluation can be performed for 2.7V (CON2) terminals and regulate its current limit to VIN 5.5V, and the low-power bias supply for VS can be approximately 7.5A. An ammeter may be placed avoided. Similarly, the CTL pin can be shorted to VS by between the input supply and the IN terminal to the means of header J1, making the function generator evaluation board. Ensure that the supply voltage is redundant. monitored at the IN terminal (CON1 or J5), because Power-Up Precautions the ammeter and/or power lead resistance can reduce The evaluation board does not have reverse polarity the voltage supplied to the input. Keep the power protection. Applying a negative voltage to the IN or VS supply disabled do not apply power until Step 7. terminals may damage the device. 4. Connect the load to the output terminals. The turn-on of the MIC95410, especially in the presence of Connect the load across the terminals OUT large output capacitive loads associated with long input (CON3)/GND (CON4). Adjust the load. Do not exceed leads, may cause some L-C ringing. The ringing may a 7A current. Output voltage may be monitored at J4. cause false current readings and generate voltage 5. Connect the DMM across the MIC95410. overshoot. Reducing the length of the input leads as much Set the DMM to a mV voltage reading and connect it as possible (10cm or less) or using a large electrolytic between J6-1 (IN S, positive terminal) and J6-2 decoupling capacitor (up to some mF) between IN (CON1) (OUT S, negative terminal). This is for reading the and GND (CON2) of the evaluation board is voltage drop across the MIC95410. recommended. 6. Connect the function generator to CTL. Connect the function generator between J1-2 (CTL) and J1-1 (GND). Set it to DC mode with the level between 2.4V and V (unterminated). Keep the output VS disabled. 7. Enable the IN and VS supplies. 8. Enable the MIC95410. Enable the MIC95410 by enabling the function generator output. Alternatively, install a jumper across J1-2 (CTL) and J1-3 (VS). Verify that the input voltage passes to the output and monitor the voltage drop across the MIC95410 with the DMM. October 1, 2014 Revision 1.0 2