Datasheet LTC1877 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | High Efficiency Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 18 / 2 — ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. … |
| 文件格式/大小 | PDF / 246 Kb |
| 文件语言 | 英语 |
ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. LEAD FREE FINISH. TAPE AND REEL. PART MARKING
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LTC1877
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
Input Supply Voltage (VIN) ..–0.3V to 11V TOP VIEW ITH, PLL LPF Voltage ... –0.3V to 2.7V RUN 1 8 PLL LPF RUN, V I 2 TH 7 SYNC/MODE FB Voltages .. –0.3V to VIN VFB 3 6 VIN SYNC/MODE Voltage .. –0.3V to VIN GND 4 5 SW SW Voltage ... –0.3V to (VIN + 0.3V) MS8 PACKAGE 8-LEAD PLASTIC MSOP P-Channel MOSFET Source Current (DC) .. 800mA TJMAX = 125°C, θJA = 150°C/W N-Channel MOSFET Sink Current (DC) .. 800mA Peak SW Sink and Source Current .. 1.5A Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) .. 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
LTC1877EMS8#PBF LTC1877EMS8#TRPBF LTLU 8-Lead Plastic MSOP –40°C to 85°C LTC1877IMS8#PBF LTC1877IMS8#TRPBF LTLV 8-Lead Plastic MSOP –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 = 5V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 4) l 4 30 nA VFB Regulated Output Voltage (Note 4) 0°C ≤ TA ≤ 85°C 0.784 0.8 0.816 V (Note 4) –40°C ≤ TA ≤ 85°C l 0.74 0.8 0.84 V ΔVOVL Output Overvoltage Lockout ΔVOVL = VOVL – VFB l 20 50 110 mV ΔVFB Reference Voltage Line Regulation VIN = 2.65V to 10V (Note 4) 0.05 0.15 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.9V to 1.2V l 0.1 0.5 % Measured in Servo Loop; VITH = 1.6V to 1.2V l –0.1 –0.5 % VIN Input Voltage Range l 2.65 10 V IQ Input DC Bias Current (Note 5) Pulse-Skipping Mode 2.65V < VIN < 10V, VSYNC/MODE = 0V, IOUT = 0A 230 350 μA Burst Mode Operation VSYNC/MODE = VIN, IOUT = 0A 10 15 μA Shutdown VRUN = 0V, VIN = 10V 0 1 μA fOSC Oscillator Frequency VFB = 0.8V 495 550 605 kHz VFB = 0V 80 kHz fSYNC SYNC Capture Range 400 700 kHz 1877fb 2
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
Input Supply Voltage (VIN) ..–0.3V to 11V TOP VIEW ITH, PLL LPF Voltage ... –0.3V to 2.7V RUN 1 8 PLL LPF RUN, V I 2 TH 7 SYNC/MODE FB Voltages .. –0.3V to VIN VFB 3 6 VIN SYNC/MODE Voltage .. –0.3V to VIN GND 4 5 SW SW Voltage ... –0.3V to (VIN + 0.3V) MS8 PACKAGE 8-LEAD PLASTIC MSOP P-Channel MOSFET Source Current (DC) .. 800mA TJMAX = 125°C, θJA = 150°C/W N-Channel MOSFET Sink Current (DC) .. 800mA Peak SW Sink and Source Current .. 1.5A Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) .. 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
LTC1877EMS8#PBF LTC1877EMS8#TRPBF LTLU 8-Lead Plastic MSOP –40°C to 85°C LTC1877IMS8#PBF LTC1877IMS8#TRPBF LTLV 8-Lead Plastic MSOP –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 = 5V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 4) l 4 30 nA VFB Regulated Output Voltage (Note 4) 0°C ≤ TA ≤ 85°C 0.784 0.8 0.816 V (Note 4) –40°C ≤ TA ≤ 85°C l 0.74 0.8 0.84 V ΔVOVL Output Overvoltage Lockout ΔVOVL = VOVL – VFB l 20 50 110 mV ΔVFB Reference Voltage Line Regulation VIN = 2.65V to 10V (Note 4) 0.05 0.15 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.9V to 1.2V l 0.1 0.5 % Measured in Servo Loop; VITH = 1.6V to 1.2V l –0.1 –0.5 % VIN Input Voltage Range l 2.65 10 V IQ Input DC Bias Current (Note 5) Pulse-Skipping Mode 2.65V < VIN < 10V, VSYNC/MODE = 0V, IOUT = 0A 230 350 μA Burst Mode Operation VSYNC/MODE = VIN, IOUT = 0A 10 15 μA Shutdown VRUN = 0V, VIN = 10V 0 1 μA fOSC Oscillator Frequency VFB = 0.8V 495 550 605 kHz VFB = 0V 80 kHz fSYNC SYNC Capture Range 400 700 kHz 1877fb 2