Datasheet LT8640S, LT8643S (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | 42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent Current |
| Pages / Page | 30 / 2 — absoluTe MaxiMuM raTings (Note 1). pin conFiguraTion. orDer inForMaTion … |
| File Format / Size | PDF / 2.3 Mb |
| Document Language | English |
absoluTe MaxiMuM raTings (Note 1). pin conFiguraTion. orDer inForMaTion http://www.linear.com/product/LT8640S#orderinfo
Model Line for this Datasheet
Text Version of Document
LT8640S/LT8643S
absoluTe MaxiMuM raTings (Note 1)
VIN, EN/UV, PG ..42V Operating Junction Temperature Range (Note 2) BIAS ..25V LT8640SE/LT8643SE ... –40°C to 125°C FB, TR/SS . ...4V LT8640SI/LT8643SI... –40°C to 125°C SYNC Voltage . ..6V Storage Temperature Range .. –65°C to 150°C Maximum Reflow (Package Body) Temperature ...260°C
pin conFiguraTion
LT8640S LT8643S TOP VIEW TOP VIEW FB PG GND TR/SS SYNC/MODE CLKOUT FB PG V C TR/SS SYNC/MODE CLKOUT 24 23 22 21 20 19 24 23 22 21 20 19 BIAS 1 18 RT BIAS 1 18 RT INTVCC 2 25 26 17 EN INTVCC 2 25 26 17 EN GND GND GND GND GND 3 16 GND GND 3 16 GND NC 4 15 NC NC 4 15 NC 27 28 27 28 VIN 5 GND GND 14 VIN VIN 5 GND GND 14 VIN VIN 6 13 VIN VIN 6 13 VIN 7 8 9 10 11 12 7 8 9 10 11 12 BST SW SW SW SW SW BST SW SW SW SW SW LQFN PACKAGE LQFN PACKAGE 24-LEAD (4mm × 4mm × 0.94mm) 24-LEAD (4mm × 4mm × 0.94mm) θJA = 38°C/W, θJC(PAD) = 7°C/W (Note 3) θJA = 38°C/W, θJC(PAD) = 7°C/W (Note 3) EXPOSED PAD (PINS 25–28) ARE GND, SHOULD BE SOLDERED TO PCB EXPOSED PAD (PINS 25–28) ARE GND, SHOULD BE SOLDERED TO PCB
orDer inForMaTion http://www.linear.com/product/LT8640S#orderinfo PACKAGE MSL PART NUMBER PART MARKING* FINISH CODE PAD FINISH TYPE** RATING TEMPERATURE RANGE
LT8640SEV#PBF 8640S LT8640SIV#PBF e4 Au (RoHS) LQFN (Laminate Package LT8643SEV#PBF with QFN Footprint) 3 –40°C to 125°C 8643S LT8643SIV#PBF • Consult Marketing for parts specified with wider operating temperature • Terminal Finish Part Marking: www.linear.com/leadfree ranges. *Device temperature grade is identified by a label on the shipping • Recommended PCB Assembly and Manufacturing Procedures: container. www.linear.com/umodule/pcbassembly • Pad finish code is per IPC/JEDEC J-STD-609. • Package and Tray Drawings: www.linear.com/packaging Parts ending with PBF are RoHS and WEEE compliant. **The LT8640S/LT8643S package has the same dimensions as a standard 4mm × 4mm QFN package. 8640sfa 2 For more information www.linear.com/LT8640S Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information 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, PG ..42V Operating Junction Temperature Range (Note 2) BIAS ..25V LT8640SE/LT8643SE ... –40°C to 125°C FB, TR/SS . ...4V LT8640SI/LT8643SI... –40°C to 125°C SYNC Voltage . ..6V Storage Temperature Range .. –65°C to 150°C Maximum Reflow (Package Body) Temperature ...260°C
pin conFiguraTion
LT8640S LT8643S TOP VIEW TOP VIEW FB PG GND TR/SS SYNC/MODE CLKOUT FB PG V C TR/SS SYNC/MODE CLKOUT 24 23 22 21 20 19 24 23 22 21 20 19 BIAS 1 18 RT BIAS 1 18 RT INTVCC 2 25 26 17 EN INTVCC 2 25 26 17 EN GND GND GND GND GND 3 16 GND GND 3 16 GND NC 4 15 NC NC 4 15 NC 27 28 27 28 VIN 5 GND GND 14 VIN VIN 5 GND GND 14 VIN VIN 6 13 VIN VIN 6 13 VIN 7 8 9 10 11 12 7 8 9 10 11 12 BST SW SW SW SW SW BST SW SW SW SW SW LQFN PACKAGE LQFN PACKAGE 24-LEAD (4mm × 4mm × 0.94mm) 24-LEAD (4mm × 4mm × 0.94mm) θJA = 38°C/W, θJC(PAD) = 7°C/W (Note 3) θJA = 38°C/W, θJC(PAD) = 7°C/W (Note 3) EXPOSED PAD (PINS 25–28) ARE GND, SHOULD BE SOLDERED TO PCB EXPOSED PAD (PINS 25–28) ARE GND, SHOULD BE SOLDERED TO PCB
orDer inForMaTion http://www.linear.com/product/LT8640S#orderinfo PACKAGE MSL PART NUMBER PART MARKING* FINISH CODE PAD FINISH TYPE** RATING TEMPERATURE RANGE
LT8640SEV#PBF 8640S LT8640SIV#PBF e4 Au (RoHS) LQFN (Laminate Package LT8643SEV#PBF with QFN Footprint) 3 –40°C to 125°C 8643S LT8643SIV#PBF • Consult Marketing for parts specified with wider operating temperature • Terminal Finish Part Marking: www.linear.com/leadfree ranges. *Device temperature grade is identified by a label on the shipping • Recommended PCB Assembly and Manufacturing Procedures: container. www.linear.com/umodule/pcbassembly • Pad finish code is per IPC/JEDEC J-STD-609. • Package and Tray Drawings: www.linear.com/packaging Parts ending with PBF are RoHS and WEEE compliant. **The LT8640S/LT8643S package has the same dimensions as a standard 4mm × 4mm QFN package. 8640sfa 2 For more information www.linear.com/LT8640S Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
