Datasheet LT1680 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | High Power DC/DC Step-Up Controller |
| Pages / Page | 16 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| File Format / Size | PDF / 228 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
LT1680
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW ORDER PART Power Supply Voltage (12VIN) .. – 0.3V to 20V NUMBER SL/ADJ 1 16 5VREF Sense Amplifier Input Common Mode .. – 0.3V to 60V C 2 15 T SYNC GATE Pin Voltage ... – 0.3V to 12V LT1680CN IN + 0.3V I 3 14 AVG 12VIN RUN/SHDN Pin Voltage ... – 0.3V to 12V LT1680CSW IN SS 4 13 GATE LT1680IN All Other Pin Voltages ... – 0.3V to 7V V 5 12 C PGND LT1680ISW 5V Reference Output Current ... 65mA SGND 6 11 RUN/SHDN Operating Ambient Temperature Range V 7 10 FB SENSE – LT1680C .. 0°C to 70°C V 8 9 REF SENSE + LT1680I .. – 40°C to 85°C N PACKAGE SW PACKAGE 16-LEAD PDIP 16-LEAD PLASTIC SO WIDE Storage Temperature Range .. – 65°C to 150°C TJMAX = 125°C, θJA = 75°C/ W (N) Lead Temperature (Soldering, 10 sec)... 300°C TJMAX = 125°C, θJA = 90°C/ W (SW) Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. 12VIN = 12V, VVC = 2V, VFB = VREF = 1.25V, CGATE = 3000pF, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply and Protection
I12VIN DC Active Supply Current (Note 2) Gate Output On ● 15 22 mA Gate Output Off 12 mA DC Standby Supply Current VRUN < 0.5V ● 150 250 µA VRUN/SHDN Shutdown Rising Threshold ● 1.15 1.25 1.35 V VSSHYST Shutdown Threshold Hysteresis 25 mV ISS Soft Start Charge Current ● 5 8 14 µA VUVLO Undervoltage Lockout Threshold - Falling ● 8.20 9.00 9.75 V Undervoltage Lockout Threshold - Rising ● 9.35 9.95 V Undervoltage Lockout Hysteresis ● 200 350 mV
5V Reference
VREF5 5V Reference Voltage Line, Load and Temperature ● 4.75 5 5.25 V 5V Reference Line Regulation 10V ≤ 12VIN ≤ 15V ● 3 5 mV/V IREF5 5V Reference Load Range - DC ● 10 mA Pulse ● 20 mA 5V Reference Load Regulation 0 ≤ IREF5 ≤ 20mA ● –1.25 – 2 V/A ISC 5V Reference Short-Circuit Current 45 mA
Error Amplifier
VFB Error Amplifier Reference Voltage Measured at Feedback Pin 1.242 1.250 1.258 V ● 1.235 1.265 V IFB Feedback Input Current VFB = VREF ● 0.1 0.5 1.0 µA gm Error Amplifier Transconductance ● 1200 2000 3200 µmho AV Error Amplifier Voltage Gain ● 1500 3000 V/V IVC Error Amplifier Source Current ● 200 275 µA Error Amplifier Sink Current VFB – VREF = 500mV ● 280 400 µA VVC Absolute VC Clamp Voltage Measured at VC Pin 3.5 V 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW ORDER PART Power Supply Voltage (12VIN) .. – 0.3V to 20V NUMBER SL/ADJ 1 16 5VREF Sense Amplifier Input Common Mode .. – 0.3V to 60V C 2 15 T SYNC GATE Pin Voltage ... – 0.3V to 12V LT1680CN IN + 0.3V I 3 14 AVG 12VIN RUN/SHDN Pin Voltage ... – 0.3V to 12V LT1680CSW IN SS 4 13 GATE LT1680IN All Other Pin Voltages ... – 0.3V to 7V V 5 12 C PGND LT1680ISW 5V Reference Output Current ... 65mA SGND 6 11 RUN/SHDN Operating Ambient Temperature Range V 7 10 FB SENSE – LT1680C .. 0°C to 70°C V 8 9 REF SENSE + LT1680I .. – 40°C to 85°C N PACKAGE SW PACKAGE 16-LEAD PDIP 16-LEAD PLASTIC SO WIDE Storage Temperature Range .. – 65°C to 150°C TJMAX = 125°C, θJA = 75°C/ W (N) Lead Temperature (Soldering, 10 sec)... 300°C TJMAX = 125°C, θJA = 90°C/ W (SW) Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. 12VIN = 12V, VVC = 2V, VFB = VREF = 1.25V, CGATE = 3000pF, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply and Protection
I12VIN DC Active Supply Current (Note 2) Gate Output On ● 15 22 mA Gate Output Off 12 mA DC Standby Supply Current VRUN < 0.5V ● 150 250 µA VRUN/SHDN Shutdown Rising Threshold ● 1.15 1.25 1.35 V VSSHYST Shutdown Threshold Hysteresis 25 mV ISS Soft Start Charge Current ● 5 8 14 µA VUVLO Undervoltage Lockout Threshold - Falling ● 8.20 9.00 9.75 V Undervoltage Lockout Threshold - Rising ● 9.35 9.95 V Undervoltage Lockout Hysteresis ● 200 350 mV
5V Reference
VREF5 5V Reference Voltage Line, Load and Temperature ● 4.75 5 5.25 V 5V Reference Line Regulation 10V ≤ 12VIN ≤ 15V ● 3 5 mV/V IREF5 5V Reference Load Range - DC ● 10 mA Pulse ● 20 mA 5V Reference Load Regulation 0 ≤ IREF5 ≤ 20mA ● –1.25 – 2 V/A ISC 5V Reference Short-Circuit Current 45 mA
Error Amplifier
VFB Error Amplifier Reference Voltage Measured at Feedback Pin 1.242 1.250 1.258 V ● 1.235 1.265 V IFB Feedback Input Current VFB = VREF ● 0.1 0.5 1.0 µA gm Error Amplifier Transconductance ● 1200 2000 3200 µmho AV Error Amplifier Voltage Gain ● 1500 3000 V/V IVC Error Amplifier Source Current ● 200 275 µA Error Amplifier Sink Current VFB – VREF = 500mV ● 280 400 µA VVC Absolute VC Clamp Voltage Measured at VC Pin 3.5 V 2
