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SI9139DG-3320 Datasheet(PDF) 4 Page - Vishay Siliconix |
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SI9139DG-3320 Datasheet(HTML) 4 Page - Vishay Siliconix |
4 / 17 page Si9139 Vishay Siliconix New Product www.vishay.com 4 Document Number: 71841 S-22317—Rev. A, 16-Dec-02 PIN CONFIGURATION RESET FBA FBC SSOP-28 DHA BSTC LXA DHC BSTA LXC DLC CSP DLA VIN VL Top View 25 26 27 28 2 3 4 1 22 23 24 5 6 7 CSN FBB COMP PGND GND DLB REF BSTB ONA ONB CSB LXB DHB CSA 18 19 20 21 9 10 11 8 15 16 17 12 13 14 PIN DESCRIPTION Pin Symbol Description 1 RESET Open drain NMOS output active-low timed reset output. RESET swings GND to VL. Goes high after a fixed 32,000 clock cycle delay following proper power-up of all supply outputs indicating Power_Good. 2 FBC Feedback for Auxiliary controller C. Normally connected to an external resistor divider used to set the Auxiliary output voltage. 3 BSTC Boost capacitor connection for Auxiliary SMPS controller C 4 DHC Gate-drive output for Auxiliary SMPS controller C high-side MOSFET 5 LXC Inductor connection for Auxiliary SMPS controller C 6 DLC Gate-drive output for Auxiliary SMPS controller C low-side MOSFET 7 CSP Current sense positive input for Auxiliary SMPS controller C 8 CSN Current sense negative input for Auxiliary SMPS controller C 9 COMP Auxiliary SMPS controller C compensation connection, if required 10 GND Analog ground 11 REF 3.3-V internal reference 12 ONA Logic High enables the SMPS controller A 13 ONB Logic High enables the SMPS controller B and the Auxiliary SMPS controller C adjustable SMPS controllers 14 CSB Current sense input for SMPS controller B 15 DHB Gate-drive output for SMPS controller B high-side MOSFET 16 LXB Inductor connection for SMPS controller B 17 BSTB Boost capacitor connection for SMPS controller B 18 DLB Gate-drive output for SMPS controller B low-side MOSFET 19 PGND Power ground 20 FBB Feedback for SMPS controller B 21 VL 5-V logic supply voltage for internal circuitry 22 VIN Input voltage 23 DLA Gate-drive output for SMPS controller A low-side MOSFET 24 BSTA Boost capacitor connection for SMPS controller A 25 LXA Gate-drive output for SMPS controller A high-side MOSFET 26 DHA Inductor connection for SMPS controller A low-side MOSFET 27 FBA Feedback for SMPS controller A 28 CSA Current sense input for SMPS controller A |
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