Datasheet LTC3548-2 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Dual Synchronous, Fixed/Adjustable Output, 2.25MHz Step-Down DC/DC Regulator |
| Seiten / Seite | 16 / 2 — ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. … |
| Dateiformat / Größe | PDF / 418 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. LEAD FREE FINISH. TAPE AND REEL. PART MARKING
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LTC3548-2
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
TOP VIEW VIN Voltages ...– 0.3V to 6V VOUT1, VFB2 Voltages .. –0.3V to VIN + 0.3V V 1 10 V OUT1 FB2 RUN1, RUN2 Voltages ...–0.3V to V RUN1 2 9 RUN2 IN V 3 11 8 POR MODE/SYNC Voltage .. –0.3V to V IN IN + 0.3V SW1 4 7 SW2 SW1, SW2 Voltages ... –0.3V to VIN + 0.3V GND 5 6 MODE/ POR Voltage ... –0.3V to 6V SYNC Ambient Operating Temperature Range DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN (Note 2) ..– 40°C to 85°C TJMAX = 125°C, θJA = 40°C/W, θJC = 3°C/W (4-LAYER BOARD) EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB GND Junction Temperature (Note 5) ... 125°C Storage Temperature Range ...– 65°C to 125°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3548EDD-2#PBF LTC3548EDD-2#TRPBF LCDK 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°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 = 3.6V, unless otherwise specifi ed. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range l 2.5 5.5 V IFB2 Feedback Pin Input Current l 30 nA VFB2 Feedback Voltage of Channel 2 (Note 3) 0°C ≤ TA ≤ 85°C 0.588 0.6 0.612 V –40°C ≤ TA ≤ 85°C l 0.585 0.6 0.612 V VOUT1 Output Voltage of Channel 1 (Note 3) 0°C ≤ TA ≤ 85°C 1.764 1.8 1.836 V –40°C ≤ TA ≤ 85°C l 1.755 1.8 1.836 V ΔVLINEREG Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 3) 0.3 0.5 %/V ΔVLOADREG Output Voltage Load Regulation (Note 3) 0.5 % IS Input DC Supply Current (Note 4) Active Mode VOUT1 = 1.5V, VFB2 = 0.5V 700 950 μA Sleep Mode VOUT1 = 1.9V, VFB2 = 0.63V, MODE/SYNC = 3.6V 40 60 μA Shutdown RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V 0.1 1 μA fOSC Oscillator Frequency VOUT1 = 1.8V, VFB2 = 0.6V l 1.8 2.25 2.7 MHz fSYNC Synchronization Frequency 2.25 MHz ILIM Peak Switch Current Limit Channel 1 VIN = 3V, Duty Cycle <35% 0.95 1.2 1.6 A Peak Switch Current Limit Channel 2 VIN = 3V, VFB2 = 0.5V, Duty Cycle <35% 0.6 0.7 0.9 A RDS(ON) Top Switch On-Resistance (Note 6) 0.35 0.45 Ω Bottom Switch On-Resistance (Note 6) 0.30 0.45 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V, VFB2 = 0V, VOUT1 = 0V 0.01 1 μA 35482fb 2
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
TOP VIEW VIN Voltages ...– 0.3V to 6V VOUT1, VFB2 Voltages .. –0.3V to VIN + 0.3V V 1 10 V OUT1 FB2 RUN1, RUN2 Voltages ...–0.3V to V RUN1 2 9 RUN2 IN V 3 11 8 POR MODE/SYNC Voltage .. –0.3V to V IN IN + 0.3V SW1 4 7 SW2 SW1, SW2 Voltages ... –0.3V to VIN + 0.3V GND 5 6 MODE/ POR Voltage ... –0.3V to 6V SYNC Ambient Operating Temperature Range DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN (Note 2) ..– 40°C to 85°C TJMAX = 125°C, θJA = 40°C/W, θJC = 3°C/W (4-LAYER BOARD) EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB GND Junction Temperature (Note 5) ... 125°C Storage Temperature Range ...– 65°C to 125°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3548EDD-2#PBF LTC3548EDD-2#TRPBF LCDK 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°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 = 3.6V, unless otherwise specifi ed. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range l 2.5 5.5 V IFB2 Feedback Pin Input Current l 30 nA VFB2 Feedback Voltage of Channel 2 (Note 3) 0°C ≤ TA ≤ 85°C 0.588 0.6 0.612 V –40°C ≤ TA ≤ 85°C l 0.585 0.6 0.612 V VOUT1 Output Voltage of Channel 1 (Note 3) 0°C ≤ TA ≤ 85°C 1.764 1.8 1.836 V –40°C ≤ TA ≤ 85°C l 1.755 1.8 1.836 V ΔVLINEREG Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 3) 0.3 0.5 %/V ΔVLOADREG Output Voltage Load Regulation (Note 3) 0.5 % IS Input DC Supply Current (Note 4) Active Mode VOUT1 = 1.5V, VFB2 = 0.5V 700 950 μA Sleep Mode VOUT1 = 1.9V, VFB2 = 0.63V, MODE/SYNC = 3.6V 40 60 μA Shutdown RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V 0.1 1 μA fOSC Oscillator Frequency VOUT1 = 1.8V, VFB2 = 0.6V l 1.8 2.25 2.7 MHz fSYNC Synchronization Frequency 2.25 MHz ILIM Peak Switch Current Limit Channel 1 VIN = 3V, Duty Cycle <35% 0.95 1.2 1.6 A Peak Switch Current Limit Channel 2 VIN = 3V, VFB2 = 0.5V, Duty Cycle <35% 0.6 0.7 0.9 A RDS(ON) Top Switch On-Resistance (Note 6) 0.35 0.45 Ω Bottom Switch On-Resistance (Note 6) 0.30 0.45 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V, VFB2 = 0V, VOUT1 = 0V 0.01 1 μA 35482fb 2