Datasheet LT1372, LT1377 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators |
| Pages / Page | 12 / 2 — ABSOLUTE AXI U RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL … |
| File Format / Size | PDF / 203 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
LT1372/LT1377
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Supply Voltage ... 30V ORDER PART NUMBER Switch Voltage TOP VIEW LT1372CN8 LT1372HVIN8 LT1372/LT1377 .. 35V V 1 C 8 VSW LT1372HVCN8 LT1372IS8 LT1372HV .. 42V FB 2 7 GND NFB 3 GND S LT1372CS8 LT1372HVIS8 S/S Pin Voltage ... 30V 6 S/S 4 5 VIN LT1372HVCS8 LT1377CS8 Feedback Pin Voltage (Transient, 10ms) .. ±10V LT1372IN8 LT1377IS8 Feedback Pin Current ... 10mA N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO Negative Feedback Pin Voltage S8 PART MARKING (Transient, 10ms) ... ±10V TJMAX = 125°C, θJA = 100°C/ W (N8) 1372 1372H 1377 TJMAX = 125°C, θJA = 120°C/ W (S8) Operating Junction Temperature Range 1372I 1372HI 1377I Commercial .. 0°C to 125°C* Consult factory for parts specified with wider operating temperature ranges. Industrial ... – 40°C to 125°C *Units shipped prior to Date Code 9552 are rated at 100°C maximum Short Circuit ... 0°C to 150°C operating temperature. Storage Temperature Range .. – 65°C to 150°C Lead Temperature (Soldering, 10 sec)... 300°C
ELECTRICAL CHARACTERISTICS The
●
denotes specifcatons which appy over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VREF Reference Voltage Measured at Feedback Pin 1.230 1.245 1.260 V VC = 0.8V ● 1.225 1.245 1.265 V IFB Feedback Input Current VFB = VREF 250 550 nA ● 900 nA Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 25V, VC = 0.8V ● 0.01 0.03 %/V VNFB Negative Feedback Reference Voltage Measured at Negative Feedback Pin – 2.540 – 2.490 – 2.440 V Feedback Pin Open, VC = 0.8V ● – 2.570 – 2.490 – 2.410 V INFB Negative Feedback Input Current VNFB = VNFR ● – 45 – 30 – 15 µA Negative Feedback Reference Voltage 2.7V ≤ VIN ≤ 25V, VC = 0.8V ● 0.01 0.05 %/V Line Regulation gm Error Amplifier Transconductance ∆IC = ±25µA 1100 1500 1900 µmho ● 700 2300 µmho Error Amplifier Source Current VFB = VREF – 150mV, VC = 1.5V ● 120 200 350 µA Error Amplifier Sink Current VFB = VREF + 150mV, VC = 1.5V ● 1400 2400 µA Error Amplifier Clamp Voltage High Clamp, VFB = 1V 1.70 1.95 2.30 V Low Clamp, VFB = 1.5V 0.25 0.40 0.52 V AV Error Amplifier Voltage Gain 500 V/ V VC Pin Threshold Duty Cycle = 0% 0.8 1 1.25 V f Switching Frequency 2.7V ≤ VIN ≤ 25V LT1372 450 500 550 kHz 0°C ≤ TJ ≤ 125°C ● 430 500 580 kHz – 40°C ≤ TJ < 0°C (I Grade) 400 580 kHz LT1377 0.90 1 1.10 MHz 0°C ≤ TJ ≤ 125°C ● 0.86 1 1.16 MHz – 40°C ≤ TJ < 0°C (I Grade) 0.80 1.16 MHz 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
Supply Voltage ... 30V ORDER PART NUMBER Switch Voltage TOP VIEW LT1372CN8 LT1372HVIN8 LT1372/LT1377 .. 35V V 1 C 8 VSW LT1372HVCN8 LT1372IS8 LT1372HV .. 42V FB 2 7 GND NFB 3 GND S LT1372CS8 LT1372HVIS8 S/S Pin Voltage ... 30V 6 S/S 4 5 VIN LT1372HVCS8 LT1377CS8 Feedback Pin Voltage (Transient, 10ms) .. ±10V LT1372IN8 LT1377IS8 Feedback Pin Current ... 10mA N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO Negative Feedback Pin Voltage S8 PART MARKING (Transient, 10ms) ... ±10V TJMAX = 125°C, θJA = 100°C/ W (N8) 1372 1372H 1377 TJMAX = 125°C, θJA = 120°C/ W (S8) Operating Junction Temperature Range 1372I 1372HI 1377I Commercial .. 0°C to 125°C* Consult factory for parts specified with wider operating temperature ranges. Industrial ... – 40°C to 125°C *Units shipped prior to Date Code 9552 are rated at 100°C maximum Short Circuit ... 0°C to 150°C operating temperature. Storage Temperature Range .. – 65°C to 150°C Lead Temperature (Soldering, 10 sec)... 300°C
ELECTRICAL CHARACTERISTICS The
●
denotes specifcatons which appy over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VREF Reference Voltage Measured at Feedback Pin 1.230 1.245 1.260 V VC = 0.8V ● 1.225 1.245 1.265 V IFB Feedback Input Current VFB = VREF 250 550 nA ● 900 nA Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 25V, VC = 0.8V ● 0.01 0.03 %/V VNFB Negative Feedback Reference Voltage Measured at Negative Feedback Pin – 2.540 – 2.490 – 2.440 V Feedback Pin Open, VC = 0.8V ● – 2.570 – 2.490 – 2.410 V INFB Negative Feedback Input Current VNFB = VNFR ● – 45 – 30 – 15 µA Negative Feedback Reference Voltage 2.7V ≤ VIN ≤ 25V, VC = 0.8V ● 0.01 0.05 %/V Line Regulation gm Error Amplifier Transconductance ∆IC = ±25µA 1100 1500 1900 µmho ● 700 2300 µmho Error Amplifier Source Current VFB = VREF – 150mV, VC = 1.5V ● 120 200 350 µA Error Amplifier Sink Current VFB = VREF + 150mV, VC = 1.5V ● 1400 2400 µA Error Amplifier Clamp Voltage High Clamp, VFB = 1V 1.70 1.95 2.30 V Low Clamp, VFB = 1.5V 0.25 0.40 0.52 V AV Error Amplifier Voltage Gain 500 V/ V VC Pin Threshold Duty Cycle = 0% 0.8 1 1.25 V f Switching Frequency 2.7V ≤ VIN ≤ 25V LT1372 450 500 550 kHz 0°C ≤ TJ ≤ 125°C ● 430 500 580 kHz – 40°C ≤ TJ < 0°C (I Grade) 400 580 kHz LT1377 0.90 1 1.10 MHz 0°C ≤ TJ ≤ 125°C ● 0.86 1 1.16 MHz – 40°C ≤ TJ < 0°C (I Grade) 0.80 1.16 MHz 2
