Datasheet LTC1775 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | High Power No RSENSE Current Mode Synchronous Step-Down Switching Regulator |
| Pages / Page | 24 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| File Format / Size | PDF / 307 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
LTC1775
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (V ORDER PART IN, TK) ... 36V to – 0.3V TOP VIEW Boosted Supply Voltage (BOOST) ... 42V to – 0.3V NUMBER EXTV 1 16 CC VIN Boosted Driver Voltage (BOOST – SW) .. 7V to – 0.3V SYNC 2 15 TK LTC1775CGN Switch Voltage (SW) ..36V to – 5V RUN/SS 3 14 SW LTC1775CS EXTVCC Voltage ...7V to –0.3V FCB 4 13 TG LTC1775IGN ITH Voltage ..2.7V to –0.3V I 5 12 TH BOOST LTC1775IS FCB, RUN/SS, SYNC Voltages ...7V to – 0.3V SGND 6 11 INTVCC VOSENSE, VPROG Voltages ..(INTVCC + 0.3V) to –0.3V V 7 10 OSENSE BG GN PART MARKING Peak Driver Output Current < 10µs (TG, BG) .. 2A V 8 9 PROG PGND INTV 1775 CC Output Current .. 50mA GN PACKAGE S PACKAGE Operating Ambient Temperature Range 16-LEAD NARROW 16-LEAD PLASTIC SO 1775I PLASTIC SSOP LTC1775C .. 0°C to 70°C TJMAX = 125°C, θJA = 130°C/W (GN) LTC1775I (Note 5) .. – 40°C to 85°C TJMAX = 125°C, θJA = 110°C/W (S) Junction Temperature (Note 2) ... 125°C Consult factory for Military grade parts. 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 at TA = 25
°
C. VIN = 15V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop
IINVOSENSE Feedback Current VPROG Pin Open, ITH = 1.19V (Note 3) 10 50 nA VOUT Regulated Output Voltage ITH = 1.19V (Note 3) 1.19V (Adjustable) Selected VPROG Pin Open ● 1.178 1.190 1.202 V 3.3V Selected VPROG = 0V ● 3.220 3.300 3.380 V 5V Selected VPROG = INTVCC ● 4.900 5.000 5.100 V VLINEREG Reference Voltage Line Regulation VIN = 4V to 20V, ITH = 1.19V (Note 3), 0.001 0.01 %/V VPROG Pin Open VLOADREG Output Voltage Load Regulation ITH = 2V (Note 3) ● – 0.020 – 0.2 % ITH = 0.5V (Note 3) ● 0.035 0.2 % VFCB Forced Continuous Threshold VFCB Ramping Negative ● 1.16 1.19 1.22 V IFCB Forced Continuous Bias Current VFCB = 1.19V – 1 – 2 µA VOVL Output Overvoltage Lockout VPROG Pin Open 1.24 1.28 1.32 V IPROG VPROG Input Current 3.3V VOUT VPROG = 0V – 3.5 – 7 µA 5V VOUT VPROG = 5V 3.5 7 µA IQ Input DC Supply Current Normal Mode EXTVCC = 5V (Note 4) 500 µA Shutdown VRUN/SS = 0V, 4V < VIN < 15V 15 30 µA VRUN/SS RUN/SS Pin Threshold ● 0.8 1.4 2 V IRUN/SS Soft Start Current Source VRUN/SS = 0V –1.2 –2.5 –4 µA ∆VSENSE(MAX) Maximum Current Sense Threshold VOSENSE = 1V, VPROG Pin Open 260 300 340 mV 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Input Supply Voltage (V ORDER PART IN, TK) ... 36V to – 0.3V TOP VIEW Boosted Supply Voltage (BOOST) ... 42V to – 0.3V NUMBER EXTV 1 16 CC VIN Boosted Driver Voltage (BOOST – SW) .. 7V to – 0.3V SYNC 2 15 TK LTC1775CGN Switch Voltage (SW) ..36V to – 5V RUN/SS 3 14 SW LTC1775CS EXTVCC Voltage ...7V to –0.3V FCB 4 13 TG LTC1775IGN ITH Voltage ..2.7V to –0.3V I 5 12 TH BOOST LTC1775IS FCB, RUN/SS, SYNC Voltages ...7V to – 0.3V SGND 6 11 INTVCC VOSENSE, VPROG Voltages ..(INTVCC + 0.3V) to –0.3V V 7 10 OSENSE BG GN PART MARKING Peak Driver Output Current < 10µs (TG, BG) .. 2A V 8 9 PROG PGND INTV 1775 CC Output Current .. 50mA GN PACKAGE S PACKAGE Operating Ambient Temperature Range 16-LEAD NARROW 16-LEAD PLASTIC SO 1775I PLASTIC SSOP LTC1775C .. 0°C to 70°C TJMAX = 125°C, θJA = 130°C/W (GN) LTC1775I (Note 5) .. – 40°C to 85°C TJMAX = 125°C, θJA = 110°C/W (S) Junction Temperature (Note 2) ... 125°C Consult factory for Military grade parts. 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 at TA = 25
°
C. VIN = 15V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop
IINVOSENSE Feedback Current VPROG Pin Open, ITH = 1.19V (Note 3) 10 50 nA VOUT Regulated Output Voltage ITH = 1.19V (Note 3) 1.19V (Adjustable) Selected VPROG Pin Open ● 1.178 1.190 1.202 V 3.3V Selected VPROG = 0V ● 3.220 3.300 3.380 V 5V Selected VPROG = INTVCC ● 4.900 5.000 5.100 V VLINEREG Reference Voltage Line Regulation VIN = 4V to 20V, ITH = 1.19V (Note 3), 0.001 0.01 %/V VPROG Pin Open VLOADREG Output Voltage Load Regulation ITH = 2V (Note 3) ● – 0.020 – 0.2 % ITH = 0.5V (Note 3) ● 0.035 0.2 % VFCB Forced Continuous Threshold VFCB Ramping Negative ● 1.16 1.19 1.22 V IFCB Forced Continuous Bias Current VFCB = 1.19V – 1 – 2 µA VOVL Output Overvoltage Lockout VPROG Pin Open 1.24 1.28 1.32 V IPROG VPROG Input Current 3.3V VOUT VPROG = 0V – 3.5 – 7 µA 5V VOUT VPROG = 5V 3.5 7 µA IQ Input DC Supply Current Normal Mode EXTVCC = 5V (Note 4) 500 µA Shutdown VRUN/SS = 0V, 4V < VIN < 15V 15 30 µA VRUN/SS RUN/SS Pin Threshold ● 0.8 1.4 2 V IRUN/SS Soft Start Current Source VRUN/SS = 0V –1.2 –2.5 –4 µA ∆VSENSE(MAX) Maximum Current Sense Threshold VOSENSE = 1V, VPROG Pin Open 260 300 340 mV 2
