Datasheet LTC3858 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | Low IQ, Dual 2-Phase Synchronous Step-Down Controller |
| Pages / Page | 38 / 2 — ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. … |
| File Format / Size | PDF / 434 Kb |
| Document Language | English |
ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. LEAD FREE FINISH. TAPE AND REEL. PART MARKING*
Model Line for this Datasheet
Text Version of Document
LTC3858
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
TOP VIEW Input Supply Voltage (VIN) ... –0.3V to 40V + Topside Driver Voltages FB1 SENSE1 V I TH1 SS1 I LIM PGOOD1 TG1 SW1 BOOST1, BOOST2 ... –0.3V to 46V 32 31 30 29 28 27 26 25 Switch Voltage (SW1, SW2) .. –5V to 40V SENSE1– 1 24 BOOST1 PLLIN/MODE,(BOOST1-SW1), FREQ 2 23 BG1 (BOOST2-SW2) ... –0.3V to 6V PHASMD 3 22 VIN RUN1, RUN2 ... –0.3V to 8V CLKOUT 4 21 PGND 33 Maximum Current Sourced into Pin PLLIN/MODE 5 SGND 20 EXTVCC SGND 6 19 INTVCC from Source >8V...100μA RUN1 7 18 BG2 SENSE1+, SENSE2+, SENSE1– RUN2 8 17 BOOST2 SENSE2– Voltages .. –0.3V to 28V 9 10 11 12 13 14 15 16 FREQ Voltages ... –0.3V to INTV – + CC FB2V I TH2 SS2 TG2 SW2 ILIM, PHASMD Voltages ... –0.3V to INTVCC SENSE2 SENSE2 PGOOD2 EXTVCC .. –0.3V to 14V UH PACKAGE 32-LEAD (5mm s 5mm) PLASTIC QFN ITH1, ITH2,VFB1, VFB2 Voltages .. –0.3V to 6V TJMAX = 125°C, θJA = 34°C/W PGOOD1, PGOOD2 Voltages ... –0.3V to 6V EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB SS1, SS2, INTVCC Voltages ... –0.3V to 6V Operating Junction Temperature Range (Note 2) .. –40°C to 125°C Maximum Junction Temperature (Note 3) .. 125°C Storage Temperature Range ... –65°C to 150°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3858EUH#PBF LTC3858EUH#TRPBF 3858 32-Lead (5mm × 5mm) Plastic QFN –40°C to 125°C LTC3858IUH#PBF LTC3858IUH#TRPBF 3858 32-Lead (5mm × 5mm) Plastic QFN –40°C to 125°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C (Note 2). VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Operating Voltage Range 4 38 V VFB1,2 Regulated Feedback Voltage (Note 4) ITH1,2 = 1.2V –40°C to 125°C l 0.788 0.800 0.812 V –40°C to 85°C 0.792 0.800 0.808 V IFB1,2 Feedback Current (Note 4) ±5 ±50 nA VREFLNREG Reference Voltage Line Regulation (Note 4) VIN = 4.5V to 38V 0.002 0.02 %/V 3858fc 2
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
TOP VIEW Input Supply Voltage (VIN) ... –0.3V to 40V + Topside Driver Voltages FB1 SENSE1 V I TH1 SS1 I LIM PGOOD1 TG1 SW1 BOOST1, BOOST2 ... –0.3V to 46V 32 31 30 29 28 27 26 25 Switch Voltage (SW1, SW2) .. –5V to 40V SENSE1– 1 24 BOOST1 PLLIN/MODE,(BOOST1-SW1), FREQ 2 23 BG1 (BOOST2-SW2) ... –0.3V to 6V PHASMD 3 22 VIN RUN1, RUN2 ... –0.3V to 8V CLKOUT 4 21 PGND 33 Maximum Current Sourced into Pin PLLIN/MODE 5 SGND 20 EXTVCC SGND 6 19 INTVCC from Source >8V...100μA RUN1 7 18 BG2 SENSE1+, SENSE2+, SENSE1– RUN2 8 17 BOOST2 SENSE2– Voltages .. –0.3V to 28V 9 10 11 12 13 14 15 16 FREQ Voltages ... –0.3V to INTV – + CC FB2V I TH2 SS2 TG2 SW2 ILIM, PHASMD Voltages ... –0.3V to INTVCC SENSE2 SENSE2 PGOOD2 EXTVCC .. –0.3V to 14V UH PACKAGE 32-LEAD (5mm s 5mm) PLASTIC QFN ITH1, ITH2,VFB1, VFB2 Voltages .. –0.3V to 6V TJMAX = 125°C, θJA = 34°C/W PGOOD1, PGOOD2 Voltages ... –0.3V to 6V EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB SS1, SS2, INTVCC Voltages ... –0.3V to 6V Operating Junction Temperature Range (Note 2) .. –40°C to 125°C Maximum Junction Temperature (Note 3) .. 125°C Storage Temperature Range ... –65°C to 150°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3858EUH#PBF LTC3858EUH#TRPBF 3858 32-Lead (5mm × 5mm) Plastic QFN –40°C to 125°C LTC3858IUH#PBF LTC3858IUH#TRPBF 3858 32-Lead (5mm × 5mm) Plastic QFN –40°C to 125°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C (Note 2). VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Operating Voltage Range 4 38 V VFB1,2 Regulated Feedback Voltage (Note 4) ITH1,2 = 1.2V –40°C to 125°C l 0.788 0.800 0.812 V –40°C to 85°C 0.792 0.800 0.808 V IFB1,2 Feedback Current (Note 4) ±5 ±50 nA VREFLNREG Reference Voltage Line Regulation (Note 4) VIN = 4.5V to 38V 0.002 0.02 %/V 3858fc 2
