Datasheet LT3800 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | High-Voltage Synchronous Current Mode Step-Down Controller |
| 页数 / 页 | 24 / 2 — ABSOLUTE MAXIMUM RATINGS(Note 1) PIN CONFIGURATION. Supply Voltages. … |
| 文件格式/大小 | PDF / 265 Kb |
| 文件语言 | 英语 |
ABSOLUTE MAXIMUM RATINGS(Note 1) PIN CONFIGURATION. Supply Voltages. Input Voltages. Input Currents. Maximum Temperatures
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LT3800
ABSOLUTE MAXIMUM RATINGS(Note 1) PIN CONFIGURATION Supply Voltages
TOP VIEW Input Supply Pin (VIN) ... –0.3V to 65V Boosted Supply Pin (BOOST) .. –0.3V to 80V V 1 IN 16 BOOST Boosted Supply Voltage (BOOST – SW) ... –0.3V to 24V NC 2 15 TG SHDN 3 14 SW Boosted Supply Reference Pin (SW) .. –2V to 65V C 4 SS 13 NC Local Supply Pin (VCC) .. –0.3V to 24V 17 BURST_EN 5 12 V
Input Voltages
CC V 6 FB 11 BG SENSE+, SENSE– .. –0.3V to 40V V 7 C 10 PGND SENSE+ – SENSE– ... –1V to 1V SENSE– 8 9 SENSE+ BURST_EN Pin .. –0.3V to 24V Other Inputs (SHDN, C FE PACKAGE SS, VFB, VC) .. –0.3V to 5.0V 16-LEAD PLASTIC TSSOP
Input Currents
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W SHDN, C EXPOSED PAD (PIN 17) IS SGND SS ... –1mA to 1mA MUST BE SOLDERED TO PCB
Maximum Temperatures
Operating Junction Temperature Range (Note 2) LT3800E (Note 3) .. –40°C to 125°C LT3800I ... –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
LT3800EFE#PBF LT3800EFE#TRPBF 3800EFE 16-Lead Plastic TSSOP –40°C to 125°C LT3800IFE#PBF LT3800IFE#TRPBF 3800IFE 16-Lead Plastic 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 = 20V, VCC = BOOST = BURST_EN = 10V, SHDN = 2V, SENSE– = SENSE+ = 10V, SGND = PGND = SW = 0V, CTG = CBG = 3300pF, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range (Note 4) ● 4 60 V Minimum Start Voltage ● 7.5 V UVLO Threshold (Falling) ● 3.65 3.80 3.95 V UVLO Hysteresis 670 mV IVIN VIN Supply Current VCC > 9V ● 20 μA VIN Burst Mode Current VBURST_EN = 0V, VFB = 1.35V 20 μA VIN Shutdown Current VSHDN = 0V 8 15 μA VBOOST Operating Voltage ● 75 V Operating Voltage Range (Note 5) VBOOST – VSW ● 20 V UVLO Threshold (Rising) VBOOST – VSW 5 V UVLO Hysteresis VBOOST – VSW 0.4 V 3800fc 2 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
ABSOLUTE MAXIMUM RATINGS(Note 1) PIN CONFIGURATION Supply Voltages
TOP VIEW Input Supply Pin (VIN) ... –0.3V to 65V Boosted Supply Pin (BOOST) .. –0.3V to 80V V 1 IN 16 BOOST Boosted Supply Voltage (BOOST – SW) ... –0.3V to 24V NC 2 15 TG SHDN 3 14 SW Boosted Supply Reference Pin (SW) .. –2V to 65V C 4 SS 13 NC Local Supply Pin (VCC) .. –0.3V to 24V 17 BURST_EN 5 12 V
Input Voltages
CC V 6 FB 11 BG SENSE+, SENSE– .. –0.3V to 40V V 7 C 10 PGND SENSE+ – SENSE– ... –1V to 1V SENSE– 8 9 SENSE+ BURST_EN Pin .. –0.3V to 24V Other Inputs (SHDN, C FE PACKAGE SS, VFB, VC) .. –0.3V to 5.0V 16-LEAD PLASTIC TSSOP
Input Currents
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W SHDN, C EXPOSED PAD (PIN 17) IS SGND SS ... –1mA to 1mA MUST BE SOLDERED TO PCB
Maximum Temperatures
Operating Junction Temperature Range (Note 2) LT3800E (Note 3) .. –40°C to 125°C LT3800I ... –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
LT3800EFE#PBF LT3800EFE#TRPBF 3800EFE 16-Lead Plastic TSSOP –40°C to 125°C LT3800IFE#PBF LT3800IFE#TRPBF 3800IFE 16-Lead Plastic 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 = 20V, VCC = BOOST = BURST_EN = 10V, SHDN = 2V, SENSE– = SENSE+ = 10V, SGND = PGND = SW = 0V, CTG = CBG = 3300pF, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range (Note 4) ● 4 60 V Minimum Start Voltage ● 7.5 V UVLO Threshold (Falling) ● 3.65 3.80 3.95 V UVLO Hysteresis 670 mV IVIN VIN Supply Current VCC > 9V ● 20 μA VIN Burst Mode Current VBURST_EN = 0V, VFB = 1.35V 20 μA VIN Shutdown Current VSHDN = 0V 8 15 μA VBOOST Operating Voltage ● 75 V Operating Voltage Range (Note 5) VBOOST – VSW ● 20 V UVLO Threshold (Rising) VBOOST – VSW 5 V UVLO Hysteresis VBOOST – VSW 0.4 V 3800fc 2 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS