Datasheet LTC1878 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | High Efficiency Monolithic Synchronous Step-Down Regulator |
| Seiten / Seite | 16 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| Dateiformat / Größe | PDF / 239 Kb |
| Dokumentensprache | Englisch |
ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL CHARACTERISTICS. The
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LTC1878
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (VIN)...– 0.3V to 7V ORDER PART ITH, PLL LPF Voltage ..–0.3V to 2.7V TOP VIEW NUMBER RUN, VFB Voltages .. – 0.3V to VIN RUN 1 8 PLL LPF SYNC/MODE Voltage .. – 0.3V to V I 2 7 SYNC/MODE IN TH LTC1878EMS8 V 3 6 V FB IN SW Voltage ... – 0.3V to (VIN + 0.3V) GND 4 5 SW P-Channel MOSFET Source Current (DC) ... 800mA MS8 PACKAGE MS8 PART MARKING 8-LEAD PLASTIC MSOP N-Channel MOSFET Sink Current (DC) ... 800mA TJMAX = 125°C, θJA = 150°C/ W Peak SW Sink and Source Current .. 1.5A LTNX Operating Ambient Temperature Range (Note 2) .. – 40°C to 85°C Consult factory for Industrial and Military grade parts. Junction Temperature (Note 3) .. 125°C Storage Temperature Range ... – 65°C to 150°C Lead Temperature (Soldering, 10 sec).. 300°C
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 4) ● 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 ● 0.74 0.8 0.84 V ∆VOVL Output Overvoltage Lockout ∆VOVL = VOVL – VFB ● 20 50 110 mV ∆VFB Reference Voltage Line Regulation VIN = 2.65V to 6V (Note 4) 0.05 0.2 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.9V to 1.2V ● 0.1 0.5 % Measured in Servo Loop; VITH = 1.6V to 1.2V ● – 0.1 – 0.5 % VIN Input Voltage Range ● 2.65 6 V IQ Input DC Bias Current (Note 5) Pulse Skipping Mode 2.65V < VIN < 6V, VSYNC/MODE = 0V, IOUT = 0A 230 350 µA Burst Mode Operation VSYNC/MODE = VIN, IOUT = 0A 10 15 µA Shutdown VRUN = 0V, VIN = 6V 0 1 µA fOSC Oscillator Frequency VFB = 0.8V 495 550 605 kHz VFB = 0V 80 kHz fSYNC SYNC Capture Range 400 700 kHz IPLL LPF Phase Detector Output Current Sinking Capability fPLLIN < fOSC ● 3 10 20 µA Sourcing Capability fPLLIN > fOSC ● –3 –10 –20 µA RPFET RDS(ON) of P-Channel MOSFET ISW = 100mA 0.5 0.7 Ω RNFET RDS(ON) of N-Channel MOSFET ISW = –100mA 0.6 0.8 Ω 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (VIN)...– 0.3V to 7V ORDER PART ITH, PLL LPF Voltage ..–0.3V to 2.7V TOP VIEW NUMBER RUN, VFB Voltages .. – 0.3V to VIN RUN 1 8 PLL LPF SYNC/MODE Voltage .. – 0.3V to V I 2 7 SYNC/MODE IN TH LTC1878EMS8 V 3 6 V FB IN SW Voltage ... – 0.3V to (VIN + 0.3V) GND 4 5 SW P-Channel MOSFET Source Current (DC) ... 800mA MS8 PACKAGE MS8 PART MARKING 8-LEAD PLASTIC MSOP N-Channel MOSFET Sink Current (DC) ... 800mA TJMAX = 125°C, θJA = 150°C/ W Peak SW Sink and Source Current .. 1.5A LTNX Operating Ambient Temperature Range (Note 2) .. – 40°C to 85°C Consult factory for Industrial and Military grade parts. Junction Temperature (Note 3) .. 125°C Storage Temperature Range ... – 65°C to 150°C Lead Temperature (Soldering, 10 sec).. 300°C
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3.6V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IVFB Feedback Current (Note 4) ● 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 ● 0.74 0.8 0.84 V ∆VOVL Output Overvoltage Lockout ∆VOVL = VOVL – VFB ● 20 50 110 mV ∆VFB Reference Voltage Line Regulation VIN = 2.65V to 6V (Note 4) 0.05 0.2 %/V VLOADREG Output Voltage Load Regulation Measured in Servo Loop; VITH = 0.9V to 1.2V ● 0.1 0.5 % Measured in Servo Loop; VITH = 1.6V to 1.2V ● – 0.1 – 0.5 % VIN Input Voltage Range ● 2.65 6 V IQ Input DC Bias Current (Note 5) Pulse Skipping Mode 2.65V < VIN < 6V, VSYNC/MODE = 0V, IOUT = 0A 230 350 µA Burst Mode Operation VSYNC/MODE = VIN, IOUT = 0A 10 15 µA Shutdown VRUN = 0V, VIN = 6V 0 1 µA fOSC Oscillator Frequency VFB = 0.8V 495 550 605 kHz VFB = 0V 80 kHz fSYNC SYNC Capture Range 400 700 kHz IPLL LPF Phase Detector Output Current Sinking Capability fPLLIN < fOSC ● 3 10 20 µA Sourcing Capability fPLLIN > fOSC ● –3 –10 –20 µA RPFET RDS(ON) of P-Channel MOSFET ISW = 100mA 0.5 0.7 Ω RNFET RDS(ON) of N-Channel MOSFET ISW = –100mA 0.6 0.8 Ω 2