Datasheet LT8640S-2, LT8643S-2 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | 42V, 6A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current |
| Pages / Page | 30 / 2 — ABSOLUTE MAXIMUM RATINGS (Note 1). PIN CONFIGURATION. ORDER INFORMATION. … |
| File Format / Size | PDF / 2.6 Mb |
| Document Language | English |
ABSOLUTE MAXIMUM RATINGS (Note 1). PIN CONFIGURATION. ORDER INFORMATION. PACKAGE. MSL. PART NUMBER. PART MARKING*. FINISH CODE
Model Line for this Datasheet
Text Version of Document
LT8640S-2/LT8643S-2
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN, EN/UV, PG ..42V Operating Junction Temperature Range (Note 2) BIAS ..25V LT8640S-2E/LT8643S-2E .. –40°C to 125°C FB, TR/SS . ...4V LT8640S-2I/LT8643S-2I .. –40°C to 125°C SYNC/MODE Voltage . ..6V LT8640S-2H/LT8643S-2H ... –40°C to 150°C Storage Temperature Range .. –65°C to 150°C Maximum Reflow (Package Body) Temperature ...260°C
PIN CONFIGURATION
LT8640S-2 LT8643S-2 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) JEDEC BOARD: θJA = 38°C/W, θJC(PAD) = 7°C/W (NOTE 3) JEDEC BOARD: θJA = 38°C/W, θJC(PAD) = 7°C/W (NOTE 3) EXPOSED PAD (PINS 25 TO 28) ARE GND, SHOULD BE SOLDERED TO PCB EXPOSED PAD (PINS 25 TO 28) ARE GND, SHOULD BE SOLDERED TO PCB
ORDER INFORMATION PACKAGE MSL PART NUMBER PART MARKING* FINISH CODE PAD FINISH TYPE** RATING TEMPERATURE RANGE
LT8640SEV-2#PBF –40°C to 125°C LT8640SIV-2#PBF 86402 –40°C to 125°C LT8640SHV-2#PBF –40°C to 150°C e4 Au (RoHS) LQFN (Laminate Package LT8643SEV-2#PBF with QFN Footprint) 3 –40°C to 125°C LT8643SIV-2#PBF 86432 –40°C to 125°C LT8643SHV-2#PBF –40°C to 150°C • Consult Marketing for parts specified with wider operating temperature • Recommended PCB Assembly and Manufacturing Procedures: ranges. *Device temperature grade is identified by a label on the shipping www.analog.com/umodule/pcbassembly container. • Package and Tray Drawings: www.analog.com/packaging • Pad finish code is per IPC/JEDEC J-STD-609. Parts ending with PBF are RoHS and WEEE compliant. **The LT8640S-2/LT8643S-2 package has the same dimensions as a standard 4mm × 4mm QFN package. Rev 0 2 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION E LECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATIONS RELATED PARTS
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN, EN/UV, PG ..42V Operating Junction Temperature Range (Note 2) BIAS ..25V LT8640S-2E/LT8643S-2E .. –40°C to 125°C FB, TR/SS . ...4V LT8640S-2I/LT8643S-2I .. –40°C to 125°C SYNC/MODE Voltage . ..6V LT8640S-2H/LT8643S-2H ... –40°C to 150°C Storage Temperature Range .. –65°C to 150°C Maximum Reflow (Package Body) Temperature ...260°C
PIN CONFIGURATION
LT8640S-2 LT8643S-2 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) JEDEC BOARD: θJA = 38°C/W, θJC(PAD) = 7°C/W (NOTE 3) JEDEC BOARD: θJA = 38°C/W, θJC(PAD) = 7°C/W (NOTE 3) EXPOSED PAD (PINS 25 TO 28) ARE GND, SHOULD BE SOLDERED TO PCB EXPOSED PAD (PINS 25 TO 28) ARE GND, SHOULD BE SOLDERED TO PCB
ORDER INFORMATION PACKAGE MSL PART NUMBER PART MARKING* FINISH CODE PAD FINISH TYPE** RATING TEMPERATURE RANGE
LT8640SEV-2#PBF –40°C to 125°C LT8640SIV-2#PBF 86402 –40°C to 125°C LT8640SHV-2#PBF –40°C to 150°C e4 Au (RoHS) LQFN (Laminate Package LT8643SEV-2#PBF with QFN Footprint) 3 –40°C to 125°C LT8643SIV-2#PBF 86432 –40°C to 125°C LT8643SHV-2#PBF –40°C to 150°C • Consult Marketing for parts specified with wider operating temperature • Recommended PCB Assembly and Manufacturing Procedures: ranges. *Device temperature grade is identified by a label on the shipping www.analog.com/umodule/pcbassembly container. • Package and Tray Drawings: www.analog.com/packaging • Pad finish code is per IPC/JEDEC J-STD-609. Parts ending with PBF are RoHS and WEEE compliant. **The LT8640S-2/LT8643S-2 package has the same dimensions as a standard 4mm × 4mm QFN package. Rev 0 2 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION E LECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATIONS RELATED PARTS
