Datasheet LTC1771 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | 10µA Quiescent Current High Efficiency Step-Down DC/DC Controller |
| Pages / Page | 16 / 2 — ABSOLUTE AXI U RATI GS (Note 1). PACKAGE/ORDER I FOR ATIO. ELECTRICAL … |
| File Format / Size | PDF / 243 Kb |
| Document Language | English |
ABSOLUTE AXI U RATI GS (Note 1). PACKAGE/ORDER I FOR ATIO. ELECTRICAL CHARACTERISTICS The
Model Line for this Datasheet
Text Version of Document
LTC1771
W W W U ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (VIN).. –0.3V to 20V Junction Temperature (Note 2) .. 125°C Peak Driver Output Current < 10µs (PGATE) ... 1A Operating Temperature Range (Note 3) RUN/SS Voltage ... – 0.3V to (VIN + 0.3V)* LTC1771E ... – 40°C to 85°C MODE Voltage .. – 0.3V to 20V LTC1771I ... – 40°C to 85°C ITH, VFB Voltage .. – 0.3V to 5V Storage Temperature Range ... – 65°C to 150°C SENSE Voltage (VIN > 12V)..(VIN – 12V) to (VIN + 0.3V)* Lead Temperature (Soldering, 10 sec).. 300°C SENSE Voltage (VIN ≤ 12V) .. – 0.3V to (VIN + 0.3V)* *RUN/SS and SENSE cannot exceed 20V.
U W U PACKAGE/ORDER I FOR ATIO
ORDER PART ORDER PART NUMBER TOP VIEW NUMBER TOP VIEW RUN/SS 1 8 MODE RUN/SS 1 8 MODE LTC1771EMS8 LTC1771ES8 I 2 7 SENSE I TH TH 2 7 SENSE LTC1771IS8 VFB 3 6 VIN V 3 6 V FB IN GND 4 5 PGATE GND 4 5 PGATE MS8 PACKAGE MS8 PART MARKING S8 PART MARKING 8-LEAD PLASTIC MSOP S8 PACKAGE T 8-LEAD PLASTIC SO JMAX = 125°C, θJA = 200°C/ W LTKD 1771 TJMAX = 125°C, θJA = 110°C/ W 1771I Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 10V, VRUN = open unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VFB Feedback Voltage (Note 5) ● 1.205 1.230 1.255 V IFB Feedback Current (Note 5) ● 1 10 nA ISUPPLY No-Load Supply Current VIN = 10V, ILOAD = 0 (Note 6) 10 µA ∆VLINEREG Reference Voltage Line Regulation VIN = 5V to 15V (Note 5) ● 0.003 0.03 %/V ∆VLOADREG Output Voltage Load Regulation ITH = 0.5V to 2V, Burst Disabled (Note 5) ● 0.25 1 % IQ Input DC Supply Current (Note 4) Active Mode (PGATE = 0V) VIN = 2.8V to 18V 150 235 µA Sleep Mode (Note 6) VIN = 2.8V to 18V, VFB = 1.5V 9 15 µA Shutdown VIN = 2.8V to 18V, VRUN = 0V 2 6 µA Short Circuit VIN = 2.8V to 18V, VFB = 0V 175 275 µA ∆VSENSE(MAX) Maximum Current Sense Threshold VFB = VREF – 20mV ● 110 140 180 mV ∆VSENSE(MIN) Minimum Current Sense Threshold VFB = VREF + 20mV, Burst Disabled – 25 mV ∆VSENSE(SLEEP) Sleep Current Sense Threshold ITH = 1V 50 mV tOFF Switch Off Time VFB at Regulated Value 3 3.5 4 µs VFB = 0V 70 µs VMODE Mode Pin Threshold VMODE Rising ● 0.5 1.3 2 V 2
W W W U ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (VIN).. –0.3V to 20V Junction Temperature (Note 2) .. 125°C Peak Driver Output Current < 10µs (PGATE) ... 1A Operating Temperature Range (Note 3) RUN/SS Voltage ... – 0.3V to (VIN + 0.3V)* LTC1771E ... – 40°C to 85°C MODE Voltage .. – 0.3V to 20V LTC1771I ... – 40°C to 85°C ITH, VFB Voltage .. – 0.3V to 5V Storage Temperature Range ... – 65°C to 150°C SENSE Voltage (VIN > 12V)..(VIN – 12V) to (VIN + 0.3V)* Lead Temperature (Soldering, 10 sec).. 300°C SENSE Voltage (VIN ≤ 12V) .. – 0.3V to (VIN + 0.3V)* *RUN/SS and SENSE cannot exceed 20V.
U W U PACKAGE/ORDER I FOR ATIO
ORDER PART ORDER PART NUMBER TOP VIEW NUMBER TOP VIEW RUN/SS 1 8 MODE RUN/SS 1 8 MODE LTC1771EMS8 LTC1771ES8 I 2 7 SENSE I TH TH 2 7 SENSE LTC1771IS8 VFB 3 6 VIN V 3 6 V FB IN GND 4 5 PGATE GND 4 5 PGATE MS8 PACKAGE MS8 PART MARKING S8 PART MARKING 8-LEAD PLASTIC MSOP S8 PACKAGE T 8-LEAD PLASTIC SO JMAX = 125°C, θJA = 200°C/ W LTKD 1771 TJMAX = 125°C, θJA = 110°C/ W 1771I Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 10V, VRUN = open unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VFB Feedback Voltage (Note 5) ● 1.205 1.230 1.255 V IFB Feedback Current (Note 5) ● 1 10 nA ISUPPLY No-Load Supply Current VIN = 10V, ILOAD = 0 (Note 6) 10 µA ∆VLINEREG Reference Voltage Line Regulation VIN = 5V to 15V (Note 5) ● 0.003 0.03 %/V ∆VLOADREG Output Voltage Load Regulation ITH = 0.5V to 2V, Burst Disabled (Note 5) ● 0.25 1 % IQ Input DC Supply Current (Note 4) Active Mode (PGATE = 0V) VIN = 2.8V to 18V 150 235 µA Sleep Mode (Note 6) VIN = 2.8V to 18V, VFB = 1.5V 9 15 µA Shutdown VIN = 2.8V to 18V, VRUN = 0V 2 6 µA Short Circuit VIN = 2.8V to 18V, VFB = 0V 175 275 µA ∆VSENSE(MAX) Maximum Current Sense Threshold VFB = VREF – 20mV ● 110 140 180 mV ∆VSENSE(MIN) Minimum Current Sense Threshold VFB = VREF + 20mV, Burst Disabled – 25 mV ∆VSENSE(SLEEP) Sleep Current Sense Threshold ITH = 1V 50 mV tOFF Switch Off Time VFB at Regulated Value 3 3.5 4 µs VFB = 0V 70 µs VMODE Mode Pin Threshold VMODE Rising ● 0.5 1.3 2 V 2
