Datasheet LTC1772 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | Constant Frequency Current Mode Step-Down DC/DC Controller in SOT-23 |
| Pages / Page | 12 / 2 — ABSOLUTE MAXIMUM RATINGS. PACKAGE/ORDER INFORMATION. (Note 1). Order … |
| File Format / Size | PDF / 172 Kb |
| Document Language | English |
ABSOLUTE MAXIMUM RATINGS. PACKAGE/ORDER INFORMATION. (Note 1). Order Options. ELECTRICAL CHARACTERISTICS The
Model Line for this Datasheet
- LTC1772CS6#PBF LTC1772CS6#TRMPBF LTC1772CS6#TRMPBF LTC1772CS6#TRPBF LTC1772CS6#TRPBF LTC1772ES6#PBF LTC1772ES6#TRMPBF LTC1772ES6#TRMPBF LTC1772ES6#TRPBF LTC1772ES6#TRPBF LTC1772HS6#PBF LTC1772HS6#TRMPBF LTC1772HS6#TRMPBF LTC1772HS6#TRPBF LTC1772HS6#TRPBF LTC1772IS6#PBF LTC1772IS6#TRMPBF LTC1772IS6#TRMPBF LTC1772IS6#TRPBF LTC1772IS6#TRPBF
Text Version of Document
LTC1772
W W W U U W U ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1)
ORDER PART NUMBER Input Supply Voltage (VIN)...– 0.3V to 10V SENSE–, PGATE Voltages ... – 0.3V to (V LTC1772CS6 IN + 0.3V) V TOP VIEW LTC1772ES6 FB, ITH /RUN Voltages ... – 0.3V to 2.4V I 1 TH/RUN 6 PGATE LTC1772IS6 PGATE Peak Output Current (<10µs) ... 1A GND 2 5 VIN LTC1772HS6 Storage Ambient Temperature Range ... – 65°C to 150°C Operating Temperature Range V 3 FB 4 SENSE– S6 PART MARKING LTC1772CS6 ... 0°C to 70°C S6 PACKAGE 6-LEAD PLASTIC SOT-23 LTIL LTC1772ES6 (Note 2) .. – 40°C to 85°C θJA = 230°C/ W LTIM LTC1772IS6 (Note 2) ... – 40°C to 85°C LTB7 LTC1772HS6 (Notes 2,3) ... – 40°C to 140°C LTBRY Junction Temperature (Note 3) ... 150°C Lead Temperature (Soldering, 10 sec).. 300°C
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 4.2V unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Input DC Supply Current Typicals at VIN = 4.2V (Note 4) Normal Operation 2.4V ≤ VIN ≤ 9.8V 270 420 µA Sleep Mode 2.4V ≤ VIN ≤ 9.8V 230 370 µA Shutdown 2.4V ≤ VIN ≤ 9.8V, VITH /RUN = 0V 8 22 µA UVLO VIN < UVLO Threshold 6 10 µA Undervoltage Lockout Threshold VIN Falling (LTC1772C) ● 1.60 2.00 2.30 V VIN Falling (LTC1772E, LTC1772I, LTC1772H) ● 1.55 2.00 2.35 V VIN Rising 1.85 2.10 2.40 V Shutdown Threshold (at ITH /RUN) (LTC1772C) ● 0.20 0.35 0.50 V (LTC1772E, LTC1772I, LTC1772H) ● 0.15 0.35 0.55 V Start-Up Current Source VITH/RUN = 0V 0.25 0.5 0.85 µA Regulated Feedback Voltage (Note 5) (LTC1772C) ● 0.780 0.800 0.820 V (Note 5) (LTC1772E, LTC1772I, LTC1772H) ● 0.770 0.800 0.830 V Output Voltage Line Regulation 2.4V ≤ VIN ≤ 9.8V (Note 5) 0.05 mV/V Output Voltage Load Regulation ITH/RUN Sinking 5µA (Note 5) 2.5 mV/µA ITH/RUN Sourcing 5µA (Note 5) 2.5 mV/µA VFB Input Current (Note 5) 10 50 nA Overvoltage Protect Threshold Measured at VFB 0.820 0.860 0.895 V Overvoltage Protect Hysteresis 20 mV Oscillator Frequency VFB = 0.8V 500 550 650 kHz VFB = 0V 120 kHz Gate Drive Rise Time CLOAD = 3000pF 40 ns Gate Drive Fall Time CLOAD = 3000pF 40 ns Peak Current Sense Voltage (Note 6) 120 mV 1772fb 2
W W W U U W U ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1)
ORDER PART NUMBER Input Supply Voltage (VIN)...– 0.3V to 10V SENSE–, PGATE Voltages ... – 0.3V to (V LTC1772CS6 IN + 0.3V) V TOP VIEW LTC1772ES6 FB, ITH /RUN Voltages ... – 0.3V to 2.4V I 1 TH/RUN 6 PGATE LTC1772IS6 PGATE Peak Output Current (<10µs) ... 1A GND 2 5 VIN LTC1772HS6 Storage Ambient Temperature Range ... – 65°C to 150°C Operating Temperature Range V 3 FB 4 SENSE– S6 PART MARKING LTC1772CS6 ... 0°C to 70°C S6 PACKAGE 6-LEAD PLASTIC SOT-23 LTIL LTC1772ES6 (Note 2) .. – 40°C to 85°C θJA = 230°C/ W LTIM LTC1772IS6 (Note 2) ... – 40°C to 85°C LTB7 LTC1772HS6 (Notes 2,3) ... – 40°C to 140°C LTBRY Junction Temperature (Note 3) ... 150°C Lead Temperature (Soldering, 10 sec).. 300°C
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 4.2V unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Input DC Supply Current Typicals at VIN = 4.2V (Note 4) Normal Operation 2.4V ≤ VIN ≤ 9.8V 270 420 µA Sleep Mode 2.4V ≤ VIN ≤ 9.8V 230 370 µA Shutdown 2.4V ≤ VIN ≤ 9.8V, VITH /RUN = 0V 8 22 µA UVLO VIN < UVLO Threshold 6 10 µA Undervoltage Lockout Threshold VIN Falling (LTC1772C) ● 1.60 2.00 2.30 V VIN Falling (LTC1772E, LTC1772I, LTC1772H) ● 1.55 2.00 2.35 V VIN Rising 1.85 2.10 2.40 V Shutdown Threshold (at ITH /RUN) (LTC1772C) ● 0.20 0.35 0.50 V (LTC1772E, LTC1772I, LTC1772H) ● 0.15 0.35 0.55 V Start-Up Current Source VITH/RUN = 0V 0.25 0.5 0.85 µA Regulated Feedback Voltage (Note 5) (LTC1772C) ● 0.780 0.800 0.820 V (Note 5) (LTC1772E, LTC1772I, LTC1772H) ● 0.770 0.800 0.830 V Output Voltage Line Regulation 2.4V ≤ VIN ≤ 9.8V (Note 5) 0.05 mV/V Output Voltage Load Regulation ITH/RUN Sinking 5µA (Note 5) 2.5 mV/µA ITH/RUN Sourcing 5µA (Note 5) 2.5 mV/µA VFB Input Current (Note 5) 10 50 nA Overvoltage Protect Threshold Measured at VFB 0.820 0.860 0.895 V Overvoltage Protect Hysteresis 20 mV Oscillator Frequency VFB = 0.8V 500 550 650 kHz VFB = 0V 120 kHz Gate Drive Rise Time CLOAD = 3000pF 40 ns Gate Drive Fall Time CLOAD = 3000pF 40 ns Peak Current Sense Voltage (Note 6) 120 mV 1772fb 2
