Datasheet LT3474, LT3474-1 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Step-Down 1A LED Driver |
| Seiten / Seite | 20 / 2 — ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION … |
| Dateiformat / Größe | PDF / 226 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION LEAD FREE FINISH. TAPE AND REEL. PART MARKING
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Textversion des Dokuments
LT3474/LT3474-1
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
VIN Pin ..(–0.3V), 36V BIAS Pin ..25V TOP VIEW BOOST Pin Voltage ...51V BOOST above SW Pin ...25V DNC* 1 16 DNC* OUT 2 15 GND OUT, LED Pins (LT3474) ..15V LED 3 14 PWM OUT, LED Pins (LT3474-1) ...26V V 4 IN 17 13 VADJ PWM Pin ...10V SW 5 12 VC VADJ Pin ...6V BOOST 6 11 REF VC, REF, RT Pins ..3V BIAS 7 10 SHDN SHDN Pin ...VIN GND 8 9 RT BIAS Pin Current ...1A FE PACKAGE Maximum Junction Temperature (Note 2)... 125°C 16-LEAD PLASTIC TSSOP Operating Temperature Range (Note 3) θJC = 8°C/W, θJA = 40°C/W EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB LT3474E, LT3474E-1 .. –40°C to 85°C *DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS. LT3474I, LT3474I-1 .. –40°C to 125°C Storage Temperature Range ... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .. 300°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3474EFE#PBF LT3474EFE#TRPBF 3474EFE 16-Lead TSSOP –40°C to 85°C LT3474IFE#PBF LT3474IFE#TRPBF 3474IFE 16-Lead TSSOP –40°C to 125°C LT3474EFE-1#PBF LT3474EFE-1#TRPBF 3474EFE-1 16-Lead TSSOP –40°C to 85°C LT3474IFE-1#PBF LT3474IFE-1#TRPBF 3474IFE-1 16-Lead TSSOP –40°C to 125°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. 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 temperature range, otherwise specifi cations are at TA = 25°C. VIN = 12V, VBOOST = 16V, VOUT = 4V unless otherwise noted (Note 3). PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 3.5 4 V Input Quiescent Current Not Switching 2.6 4 mA Shutdown Current SHDN = 0.3V, VBOOST = 0V, VOUT = 0V 0.01 2 μA LED Pin Current VADJ Tied to VREF 0.98 1 1.02 A l 0.968 1.025 A VADJ Tied to VREF/5 0.193 0.2 0.207 A l 0.186 0.210 A REF Voltage l 1.23 1.25 1.265 V 3474fd 2
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
VIN Pin ..(–0.3V), 36V BIAS Pin ..25V TOP VIEW BOOST Pin Voltage ...51V BOOST above SW Pin ...25V DNC* 1 16 DNC* OUT 2 15 GND OUT, LED Pins (LT3474) ..15V LED 3 14 PWM OUT, LED Pins (LT3474-1) ...26V V 4 IN 17 13 VADJ PWM Pin ...10V SW 5 12 VC VADJ Pin ...6V BOOST 6 11 REF VC, REF, RT Pins ..3V BIAS 7 10 SHDN SHDN Pin ...VIN GND 8 9 RT BIAS Pin Current ...1A FE PACKAGE Maximum Junction Temperature (Note 2)... 125°C 16-LEAD PLASTIC TSSOP Operating Temperature Range (Note 3) θJC = 8°C/W, θJA = 40°C/W EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB LT3474E, LT3474E-1 .. –40°C to 85°C *DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS. LT3474I, LT3474I-1 .. –40°C to 125°C Storage Temperature Range ... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .. 300°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3474EFE#PBF LT3474EFE#TRPBF 3474EFE 16-Lead TSSOP –40°C to 85°C LT3474IFE#PBF LT3474IFE#TRPBF 3474IFE 16-Lead TSSOP –40°C to 125°C LT3474EFE-1#PBF LT3474EFE-1#TRPBF 3474EFE-1 16-Lead TSSOP –40°C to 85°C LT3474IFE-1#PBF LT3474IFE-1#TRPBF 3474IFE-1 16-Lead TSSOP –40°C to 125°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. 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 temperature range, otherwise specifi cations are at TA = 25°C. VIN = 12V, VBOOST = 16V, VOUT = 4V unless otherwise noted (Note 3). PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 3.5 4 V Input Quiescent Current Not Switching 2.6 4 mA Shutdown Current SHDN = 0.3V, VBOOST = 0V, VOUT = 0V 0.01 2 μA LED Pin Current VADJ Tied to VREF 0.98 1 1.02 A l 0.968 1.025 A VADJ Tied to VREF/5 0.193 0.2 0.207 A l 0.186 0.210 A REF Voltage l 1.23 1.25 1.265 V 3474fd 2