Datasheet LT8645S, LT8646S (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | 65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current |
| Seiten / Seite | 30 / 2 — ABSOLUTE MAXIMUM RATINGS (Note 1). PIN CONFIGURATION |
| Revision | B |
| Dateiformat / Größe | PDF / 2.4 Mb |
| Dokumentensprache | Englisch |
ABSOLUTE MAXIMUM RATINGS (Note 1). PIN CONFIGURATION
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Textversion des Dokuments
LT8645S/LT8646S
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN, EN/UV ..65V Operating Junction Temperature Range (Note 2) PG ...42V LT8645SE/LT8646SE ... –40°C to 125°C BIAS ..25V LT8645SI/LT8646SI... –40°C to 125°C FB, TR/SS . ...4V Storage Temperature Range .. –65°C to 150°C SYNC/MODE Voltage . ..6V Maximum Reflow (Package Body) Temperature ...260°C
PIN CONFIGURATION
LT8645S LT8646S TOP VIEW TOP VIEW FB PG GND TR/SS SYNC/MODE CLKOUT FB PG V C TR/SS SYNC/MODE CLKOUT 32 31 30 29 28 27 32 31 30 29 28 27 BIAS 1 26 RT BIAS 1 26 RT INTVCC 2 25 EN/UV INTVCC 2 25 EN/UV 33 34 33 34 NC 3 GND GND 24 NC NC 3 GND GND 24 NC VIN 4 23 VIN VIN 4 23 VIN VIN 5 22 VIN VIN 5 22 V 35 36 IN 35 36 V GND GND GND GND IN 6 21 VIN VIN 6 21 VIN NC 7 20 NC NC 7 20 NC GND 8 19 GND GND 8 19 GND 37 38 37 38 GND 9 GND GND 18 GND GND 9 GND GND 18 GND GND 10 17 GND GND 10 17 GND 11 12 13 14 15 16 11 12 13 14 15 16 BST SW SW SW SW SW BST SW SW SW SW SW LQFN PACKAGE LQFN PACKAGE 32-LEAD (6mm × 4mm × 0.94mm) 32-LEAD (6mm × 4mm × 0.94mm) JEDEC BOARD: θJA = 30°C/W, ΨJT = 0.6°C/W, JEDEC BOARD: θJA = 30°C/W, ΨJT = 0.6°C/W, θJCTOP = 28.5°C/W, θJC(PAD) = 4.4°C/W (NOTE 3) θJCTOP = 28.5°C/W, θJC(PAD) = 4.4°C/W (NOTE 3) DEMO BOARD: θJA = 17°C/W DEMO BOARD: θJA = 17°C/W EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB Rev. B 2 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN, EN/UV ..65V Operating Junction Temperature Range (Note 2) PG ...42V LT8645SE/LT8646SE ... –40°C to 125°C BIAS ..25V LT8645SI/LT8646SI... –40°C to 125°C FB, TR/SS . ...4V Storage Temperature Range .. –65°C to 150°C SYNC/MODE Voltage . ..6V Maximum Reflow (Package Body) Temperature ...260°C
PIN CONFIGURATION
LT8645S LT8646S TOP VIEW TOP VIEW FB PG GND TR/SS SYNC/MODE CLKOUT FB PG V C TR/SS SYNC/MODE CLKOUT 32 31 30 29 28 27 32 31 30 29 28 27 BIAS 1 26 RT BIAS 1 26 RT INTVCC 2 25 EN/UV INTVCC 2 25 EN/UV 33 34 33 34 NC 3 GND GND 24 NC NC 3 GND GND 24 NC VIN 4 23 VIN VIN 4 23 VIN VIN 5 22 VIN VIN 5 22 V 35 36 IN 35 36 V GND GND GND GND IN 6 21 VIN VIN 6 21 VIN NC 7 20 NC NC 7 20 NC GND 8 19 GND GND 8 19 GND 37 38 37 38 GND 9 GND GND 18 GND GND 9 GND GND 18 GND GND 10 17 GND GND 10 17 GND 11 12 13 14 15 16 11 12 13 14 15 16 BST SW SW SW SW SW BST SW SW SW SW SW LQFN PACKAGE LQFN PACKAGE 32-LEAD (6mm × 4mm × 0.94mm) 32-LEAD (6mm × 4mm × 0.94mm) JEDEC BOARD: θJA = 30°C/W, ΨJT = 0.6°C/W, JEDEC BOARD: θJA = 30°C/W, ΨJT = 0.6°C/W, θJCTOP = 28.5°C/W, θJC(PAD) = 4.4°C/W (NOTE 3) θJCTOP = 28.5°C/W, θJC(PAD) = 4.4°C/W (NOTE 3) DEMO BOARD: θJA = 17°C/W DEMO BOARD: θJA = 17°C/W EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB Rev. B 2 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts