Datasheet LTC1876 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator |
| Pages / Page | 36 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| File Format / Size | PDF / 372 Kb |
| Document Language | English |
ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL CHARACTERISTICS The
Model Line for this Datasheet
Text Version of Document
LTC1876
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (VIN)... 36V to –0.3V ORDER PART TOP VIEW Topside Driver Voltages NUMBER RUN/SS1 1 36 (BOOST1, BOOST2) ... 42V to –0.3V PGOOD SENSE1+ 2 35 TG1 Switch Voltage (SW1, SW2) ... 36V to –5V LTC1876EG SENSE1– 3 34 SW1 INTVCC, EXTVCC, RUN/SS1, RUN/SS2, PGOOD, V 4 33 BOOST1 OSENSE1 (BOOST1-SW1), (BOOST2-SW2), ...7V to – 0.3V FREQSET 5 32 VIN STBYMD 6 31 BG1 SENSE1+, SENSE2+, SENSE1–, SENSE2– FCB 7 30 EXTVCC Voltages ... (1.1)INTVCC to –0.3V I 8 29 INTV TH1 CC FREQSET, STBYMD, FCB, PGOOD 9 28 PGND SGND Voltages .. 7V to – 0.3V 10 27 BG2 3.3VOUT I 11 26 BOOST2 ITH2 ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ... 2.7V to –0.3V V 12 25 SW2 OSENSE2 Peak Output Current <10µs (TG1, TG2, BG1, BG2) ... 3A SENSE2– 13 24 TG2 INTV SENSE2+ 14 23 RUN/SS2 CC Peak Output Current .. 50mA AUXSGND 15 22 AUXSD AUXVIN .. 16V to –0.3V AUXV 16 21 AUXV FB IN AUXSD ... 10V AUXSW 17 20 AUXPGND AUXSW ... 36V to –0.3V AUXSW 18 19 AUXPGND AUXVFB Voltage ... 2.5V to –0.3V G PACKAGE Current into AUXV 36-LEAD PLASTIC SSOP FB ... ±1mA Operating Temperature Range (Note 2) ...–40°C to 85°C TJMAX = 125°C, θJA = 95°C/W Junction Temperature (Note 3) ... 125°C Consult factory for parts specified with wider operating temperature ranges. Storage Temperature Range ..–65°C to 150°C Lead Temperature (Soldering, 10 sec).. 300°C
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 15V, VRUN/SS1, 2 = 5V, AUXVIN = 3V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops
VOSENSE1, 2 Regulated Feedback Voltage ITH1, 2 Voltage = 1.2V (Note 4) ● 0.792 0.800 0.808 V IVOSENSE1, 2 Feedback Current (Note 4) –5 –50 nA VREFLNREG Reference Voltage Line Regulation VIN = 3.6V to 30V (Note 4) 0.002 0.02 %/V VLOADREG Output Voltage Load Regulation (Note 4) Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V ● 0.1 0.5 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 2V ● –0.1 –0.5 % gm1, 2 Transconductance Amplifier gm ITH1, 2 = 1.2V; Sink/Source 5µA; (Note 4) 1.3 mmho gmOL1, 2 Transconductance Amplifier GBW ITH1, 2 = 1.2V; (Note 4) 3 MHz IQ Input DC Supply Current (Note 5) Normal Mode VIN = 15V; EXTVCC Tied to VOUT1; VOUT1 = 5V 350 µA Standby VRUN/SS1, 2 = 0V, VSTBYMD > 2V 125 µA Shutdown VRUN/SS1, 2 = 0V, VSTBYMD = Open 20 35 µA VFCB Forced Continuous Threshold ● 0.76 0.800 0.84 V IFCB Forced Continuous Current VFCB = 0.85V –0.3 –0.18 –0.1 µA VBINHIBIT Burst Inhibit (Constant Frequency) Measured at FCB pin 4.3 4.8 V Threshold 1876fa 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (VIN)... 36V to –0.3V ORDER PART TOP VIEW Topside Driver Voltages NUMBER RUN/SS1 1 36 (BOOST1, BOOST2) ... 42V to –0.3V PGOOD SENSE1+ 2 35 TG1 Switch Voltage (SW1, SW2) ... 36V to –5V LTC1876EG SENSE1– 3 34 SW1 INTVCC, EXTVCC, RUN/SS1, RUN/SS2, PGOOD, V 4 33 BOOST1 OSENSE1 (BOOST1-SW1), (BOOST2-SW2), ...7V to – 0.3V FREQSET 5 32 VIN STBYMD 6 31 BG1 SENSE1+, SENSE2+, SENSE1–, SENSE2– FCB 7 30 EXTVCC Voltages ... (1.1)INTVCC to –0.3V I 8 29 INTV TH1 CC FREQSET, STBYMD, FCB, PGOOD 9 28 PGND SGND Voltages .. 7V to – 0.3V 10 27 BG2 3.3VOUT I 11 26 BOOST2 ITH2 ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ... 2.7V to –0.3V V 12 25 SW2 OSENSE2 Peak Output Current <10µs (TG1, TG2, BG1, BG2) ... 3A SENSE2– 13 24 TG2 INTV SENSE2+ 14 23 RUN/SS2 CC Peak Output Current .. 50mA AUXSGND 15 22 AUXSD AUXVIN .. 16V to –0.3V AUXV 16 21 AUXV FB IN AUXSD ... 10V AUXSW 17 20 AUXPGND AUXSW ... 36V to –0.3V AUXSW 18 19 AUXPGND AUXVFB Voltage ... 2.5V to –0.3V G PACKAGE Current into AUXV 36-LEAD PLASTIC SSOP FB ... ±1mA Operating Temperature Range (Note 2) ...–40°C to 85°C TJMAX = 125°C, θJA = 95°C/W Junction Temperature (Note 3) ... 125°C Consult factory for parts specified with wider operating temperature ranges. Storage Temperature Range ..–65°C to 150°C Lead Temperature (Soldering, 10 sec).. 300°C
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 15V, VRUN/SS1, 2 = 5V, AUXVIN = 3V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops
VOSENSE1, 2 Regulated Feedback Voltage ITH1, 2 Voltage = 1.2V (Note 4) ● 0.792 0.800 0.808 V IVOSENSE1, 2 Feedback Current (Note 4) –5 –50 nA VREFLNREG Reference Voltage Line Regulation VIN = 3.6V to 30V (Note 4) 0.002 0.02 %/V VLOADREG Output Voltage Load Regulation (Note 4) Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V ● 0.1 0.5 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 2V ● –0.1 –0.5 % gm1, 2 Transconductance Amplifier gm ITH1, 2 = 1.2V; Sink/Source 5µA; (Note 4) 1.3 mmho gmOL1, 2 Transconductance Amplifier GBW ITH1, 2 = 1.2V; (Note 4) 3 MHz IQ Input DC Supply Current (Note 5) Normal Mode VIN = 15V; EXTVCC Tied to VOUT1; VOUT1 = 5V 350 µA Standby VRUN/SS1, 2 = 0V, VSTBYMD > 2V 125 µA Shutdown VRUN/SS1, 2 = 0V, VSTBYMD = Open 20 35 µA VFCB Forced Continuous Threshold ● 0.76 0.800 0.84 V IFCB Forced Continuous Current VFCB = 0.85V –0.3 –0.18 –0.1 µA VBINHIBIT Burst Inhibit (Constant Frequency) Measured at FCB pin 4.3 4.8 V Threshold 1876fa 2
