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LM73605RNPT Fiches technique(PDF) 3 Page - Texas Instruments |
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LM73605RNPT Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 53 page VCC RT BIAS SS/TRK 2 3 4 23 25 24 PVIN SW SW DAP PVIN PGND SW 22 26 1 5 CBOOT SW PGND 21 6 PGND PGND 20 7 PGOOD 19 8 AGND 9 10 18 17 EN FB SYNC/ MODE 16 11 29 28 27 30 13 14 15 12 SW PVIN NC NC NC NC NC NC NC NC 3 LM73605, LM73606 www.ti.com SNVSAH5 – SEPTEMBER 2017 Product Folder Links: LM73605 LM73606 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated (1) A = Analog, O = Output, I = Input, G = Ground, P = Power 5 Pin Configuration and Functions RNP Package 30-Pin Wettable Flanks QFN (WQFN) 6 mm × 4 mm × 0.8 mm Top View Pin Functions PIN I/O(1) DESCRIPTION NO. NAME 1, 2, 3, 4, 5 SW P Switching output of the regulator. Internally connected to source of the HS FET and drain of the LS FET. Connect to power inductor and boot-strap capacitor. 6 CBOOT P Boot-strap capacitor connection for HS FET driver. Connect a high-quality 470-nF capacitor from this pin to the SW pin. 7 VCC P Output of internal bias supply. Used as supply to internal control circuits and drivers. Connect a high-quality 2.2-µF capacitor from this pin to GND. TI does not recommend loading this pin by external circuitry. 8 BIAS P Optional BIAS LDO supply input. TI recommends tying to VOUT when 3.3 V ≤ VOUT ≤ 18 V, or tie to an external 3.3-V or 5-V rail if available, to improve efficiency. BIAS pin voltage must not be greater than VIN. Tie to ground when not in use. 9 RT A Switching frequency setting pin. Place a resistor from this pin to ground to set the switching frequency. If floating, the default switching frequency will be 500 kHz. Do not short to ground. 10 SS/TRK A Soft-start control pin. Leave this pin floating for a 5-ms internal soft-start ramp. An external capacitor can be connected from this pin to ground to extend the soft start time. A 2-µA current sourced from this pin charges the capacitor to provide the ramp. Connect to external ramp for tracking. Do not short to ground. 11 FB I Feedback input for output voltage regulation. Connect a resistor divider to set the output voltage. Never short this pin to ground during operation. 12–15, 27–30 NC — No internal connection. Connect to ground net and copper to improve heat sinking and board-level reliability. 16 PGOOD O Open drain power-good flag output. Connect to suitable voltage supply through a current limiting resistor. High = VOUT regulation OK, Low = VOUT regulation fault. PGOOD = LOW when EN = low and VIN > 2 V. |
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Description similaire - LM73605RNPT |
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