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MIC38C42 Datasheet(PDF) 3 Page - Micrel Semiconductor |
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MIC38C42 Datasheet(HTML) 3 Page - Micrel Semiconductor |
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MIC38C42/3/4/5 Micrel, Inc. July 2005 3 M9999-072805 Pin Description Pin Number Pin Number Pin Name Pin Function N, M, MM -1BN, -1BM 1 1 COMP Compensation: Connect external compensation network to modify the error amplifier output. 2 NC Not internally connected. 2 3 FB Feedback (Input): Error amplifier input. Feedback is 2.5V at desired output voltage. 4 NC Not internally connected. 3 5 ISNS Current Sense (Input): Current sense comparator input. Connect to current sensing resistor or current transformer. 6 NC Not internally connected. 4 7 RT/CT Timing Resistor/Timing Capacitor: Connect external RC network to select switching frequency. 5 GND Ground: Combined analog and power ground. 8 PGND Power Ground: N-channel driver transistor ground. 9 AGND Analog Ground: Controller circuitry ground. 6 10 OUT Power Output: Totem-pole output. 11 VD Power Supply (Input): P-channel driver transistor supply input. Return to power ground (PGND). 7 12 VDD Analog Supply (Input): Controller circuitry supply input. Return to analog ground (AGND). 13 NC Not internally connected. 8 14 VREF 5V Reference (Output): Connect external RC network. 1 2 3 4 8 7 6 5 COMP FB ISNS RT/CT VREF VDD OUT GND MIC38C4x 2 NC NC 13 3 FB VDD 12 4 NC VD 11 5 ISNS OUT 10 6 NC AGND 9 7 RT/CT PGND 8 1 COMP V R E F 14 MIC38C4x-1 8-Pin DIP (N) 8-Lead SOIC (M) 8-Lead MM8™ (MM) 14-Pin DIP (-1BN) 14-Lead SOIC (-1BM) Pin Configuration |
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