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MIC2103 Datasheet(PDF) 2 Page - Micrel Semiconductor |
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MIC2103 Datasheet(HTML) 2 Page - Micrel Semiconductor |
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2 / 38 page  Micrel, Inc. MIC2103/04 November 26, 2013 2 Revision 2.0 Ordering Information Part Number Switching Frequency Features Package Junction Temperature Range Lead Finish MIC2103YML 200kHz to 600kHz Hyper Light Load 16-pin 3mm x 3mm MLF –40°C to +125°C Pb-Free MIC2104YML 200kHz to 600kHz Hyper Speed Control 16-pin 3mm x 3mm MLF –40°C to +125°C Pb-Free Pin Configuration 16-Pin 3mm x 3mm MLF (ML) (TOP VIEW) Pin Description Pin Number Pin Name Pin Function 1 VDD Internal +5V linear regulator output. VDD is the internal supply bus for the device. A 1μF ceramic capacitor from VDD to AGND is required for decoupling. In the applications with VIN<+5.5V, VDD should be tied to VIN to by-pass the linear regulator. 2 PVDD 5V supply input for the low-side N-channel MOSFET driver, which can be tied to VDD externally. A 1μF ceramic capacitor from PVDD to PGND is recommended for decoupling. 3 ILIM Current Limit Setting. Connect a resistor from SW to ILIM to set the over-current threshold for the converter. 4 DL Low-Side Drive output. High-current driver output for external low-side MOSFET of a buck converter. The DL driving voltage swings from ground to VDD. Adding a small resistor between DL pin and the gate of the low-side N-channel MOSFET can slow down the turn-on and turn-off speed of the MOSFET. 5 PGND Power Ground. PGND is the return path for the buck converter power stage. The PGND pin connects to the sources of low-side N-Channel external MOSFET, the negative terminals of input capacitors, and the negative terminals of output capacitors. The return path for the power ground should be as small as possible and separate from the Signal ground (AGND) return path. 6 FREQ Switching Frequency Adjust input. Tie this pin to VIN to operate at 600kHz and place a resistor divider to reduce the frequency. 7 DH High-Side Drive output. High-current driver output for external high-side MOSFET of a buck converter. The DH driving voltage is floating on the switch node voltage (VSW). Adding a small resistor between DH pin and the gate of the high-side N-channel MOSFET can slow down the turn-on and turn-off speed of the MOSFET. 8 SW Switch Node and Current-Sense input. High current output driver return. The SW pin connects directly to the switch node. Due to the high-speed switching on this pin, the SW pin should be routed away from sensitive nodes. The SW pin also senses the current by monitoring the voltage across the low-side MOSFET during OFF time. In order to sense the current accurately, connect the low-side MOSFET drain to the SW pin using a Kelvin connection. |
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