Datasheet LTC3850, LTC3850-1 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | Dual, 2-Phase Synchronous Step-Down Switching Controller |
| Pages / Page | 38 / 2 — ABSOLUTE MAXIMUM RATINGS (Note 1). PIN CONFIGURATION |
| Revision | D |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
ABSOLUTE MAXIMUM RATINGS (Note 1). PIN CONFIGURATION
Model Line for this Datasheet
- LTC3850EGN#PBF LTC3850EGN#TRPBF LTC3850EGN#WPBF LTC3850EGN#WTRPBF LTC3850EGN-1#PBF LTC3850EGN-1#TRPBF LTC3850EGN-1#WPBF LTC3850EGN-1#WTRPBF LTC3850EUF#PBF LTC3850EUF#TRPBF LTC3850EUFD#PBF LTC3850EUFD#TRPBF LTC3850IGN#PBF LTC3850IGN#TRPBF LTC3850IGN#WPBF LTC3850IGN#WTRPBF LTC3850IGN-1#PBF LTC3850IGN-1#TRPBF LTC3850IGN-1#WPBF LTC3850IGN-1#WTRPBF LTC3850IUF#PBF LTC3850IUF#TRPBF LTC3850IUFD#PBF LTC3850IUFD#TRPBF
Text Version of Document
LTC3850/LTC3850-1
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN) ...28V to –0.3V SENSE1+, SENSE2+, SENSE1–, Input Supply Voltage (VIN), SENSE2– Voltages .. 5.5V to –0.3V LTC3850I Only ...30V to –0.3V MODE/PLLIN, ILIM,TK/SS1,TK/SS2, FREQ/PLLFLTR Input Supply Transient Voltage (VIN) < 500ms, with Voltages ..INTVCC to –0.3V INTVCC ≥ 5V, LTC3850I Only ...34V to –0.3V ITH1, ITH2, VFB1, VFB2 Voltages ...2.7V to –0.3V Top Side Driver Voltages INTVCC Peak Output Current ..100mA BOOST1, BOOST2 ..34V to –0.3V Operating Temperature Range (Note 2)..–40°C to 85°C Switch Voltage (SW1, SW2) ..28V to –5V Junction Temperature (Note 3) ... 125°C Switch Voltage (SW1, SW2), Storage Temperature Range .. –65°C to 125°C LTC3850I Only ..30V to –5V Lead Temperature (Soldering, 10 sec) INTVCC, RUN1, RUN2, PGOOD, EXTVCC, (GN Package) ..300°C (BOOST1-SW1), (BOOST2-SW2) ...6V to –0.3V
PIN CONFIGURATION
TOP VIEW TOP VIEW RUN1 1 28 FREQ/PLLFLTR SENSE1+ 2 27 MODE/PLLIN – + SENSE1– 3 26 SW1 SENSE1 SENSE1 RUN1 FREQ/PLLFLTR MODE/PLLIN SW1 TG1 TK/SS1 4 25 TG1 28 27 26 25 24 23 22 I 5 24 TH1 BOOST1 TK/SS1 1 21 BOOST1 V 6 23 FB1 BG1 ITH1 2 20 BG1 SGND 7 22 VIN VFB1 3 19 VIN V 8 21 FB2 INTVCC VFB2 4 29 18 INTVCC I 9 20 TH2 BG2 ITH2 5 17 BG2 TK/SS2 10 19 PGND TK/SS2 6 16 PGND SENSE2– 11 18 BOOST2 SENSE2– 7 15 BOOST2 SENSE2+ 12 17 TG2 8 9 10 11 12 13 14 RUN2 13 16 SW2 + I LIM CC SW2 TG2 I 14 15 RUN2 LIM (EXTVCC)* PGOOD PGOOD SENSE2 EXTV GN PACKAGE UF PACKAGE 28-LEAD NARROW PLASTIC SSOP 28-LEAD (4mm × 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 95°C/W TJMAX = 125°C, θJA = 37°C/W, θJC = 2.6°C/W *PIN 14 = ILIM FOR LTC3850GN, EXTVCC FOR LTC3850GN-1 EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB TOP VIEW TR + SENSE1 RUN1 FREQ/PLLFL MODE/PLLIN SW1 TG1 28 27 26 25 24 23 SENSE1– 1 22 BOOST1 TK/SS1 2 21 BG1 ITH1 3 20 VIN VFB1 4 19 INTVCC 29 VFB2 5 18 BG2 ITH2 6 17 PGND TK/SS2 7 16 BOOST2 SENSE2– 8 15 TG2 9 10 11 12 13 14 + V CC RUN2 ILIM SW2 EXT PGOOD SENSE2 UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 34°C/W, EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB Rev. D 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 Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (VIN) ...28V to –0.3V SENSE1+, SENSE2+, SENSE1–, Input Supply Voltage (VIN), SENSE2– Voltages .. 5.5V to –0.3V LTC3850I Only ...30V to –0.3V MODE/PLLIN, ILIM,TK/SS1,TK/SS2, FREQ/PLLFLTR Input Supply Transient Voltage (VIN) < 500ms, with Voltages ..INTVCC to –0.3V INTVCC ≥ 5V, LTC3850I Only ...34V to –0.3V ITH1, ITH2, VFB1, VFB2 Voltages ...2.7V to –0.3V Top Side Driver Voltages INTVCC Peak Output Current ..100mA BOOST1, BOOST2 ..34V to –0.3V Operating Temperature Range (Note 2)..–40°C to 85°C Switch Voltage (SW1, SW2) ..28V to –5V Junction Temperature (Note 3) ... 125°C Switch Voltage (SW1, SW2), Storage Temperature Range .. –65°C to 125°C LTC3850I Only ..30V to –5V Lead Temperature (Soldering, 10 sec) INTVCC, RUN1, RUN2, PGOOD, EXTVCC, (GN Package) ..300°C (BOOST1-SW1), (BOOST2-SW2) ...6V to –0.3V
PIN CONFIGURATION
TOP VIEW TOP VIEW RUN1 1 28 FREQ/PLLFLTR SENSE1+ 2 27 MODE/PLLIN – + SENSE1– 3 26 SW1 SENSE1 SENSE1 RUN1 FREQ/PLLFLTR MODE/PLLIN SW1 TG1 TK/SS1 4 25 TG1 28 27 26 25 24 23 22 I 5 24 TH1 BOOST1 TK/SS1 1 21 BOOST1 V 6 23 FB1 BG1 ITH1 2 20 BG1 SGND 7 22 VIN VFB1 3 19 VIN V 8 21 FB2 INTVCC VFB2 4 29 18 INTVCC I 9 20 TH2 BG2 ITH2 5 17 BG2 TK/SS2 10 19 PGND TK/SS2 6 16 PGND SENSE2– 11 18 BOOST2 SENSE2– 7 15 BOOST2 SENSE2+ 12 17 TG2 8 9 10 11 12 13 14 RUN2 13 16 SW2 + I LIM CC SW2 TG2 I 14 15 RUN2 LIM (EXTVCC)* PGOOD PGOOD SENSE2 EXTV GN PACKAGE UF PACKAGE 28-LEAD NARROW PLASTIC SSOP 28-LEAD (4mm × 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 95°C/W TJMAX = 125°C, θJA = 37°C/W, θJC = 2.6°C/W *PIN 14 = ILIM FOR LTC3850GN, EXTVCC FOR LTC3850GN-1 EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB TOP VIEW TR + SENSE1 RUN1 FREQ/PLLFL MODE/PLLIN SW1 TG1 28 27 26 25 24 23 SENSE1– 1 22 BOOST1 TK/SS1 2 21 BG1 ITH1 3 20 VIN VFB1 4 19 INTVCC 29 VFB2 5 18 BG2 ITH2 6 17 PGND TK/SS2 7 16 BOOST2 SENSE2– 8 15 TG2 9 10 11 12 13 14 + V CC RUN2 ILIM SW2 EXT PGOOD SENSE2 UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 34°C/W, EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB Rev. D 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 Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
