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LT1767EMS8E-1.8 Datasheet(PDF) 2 Page - Linear Technology |
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LT1767EMS8E-1.8 Datasheet(HTML) 2 Page - Linear Technology |
2 / 16 page 2 LT1767/LT1767-1.8/ LT1767-2.5/LT1767-3.3/LT1767-5 sn1767 1767fas ABSOLUTE MAXIMUM RATINGS Input Voltage .......................................................... 25V BOOST Pin Above SW ............................................ 20V Max BOOST Pin Voltage .......................................... 35V SHDN Pin ............................................................... 25V FB Pin Voltage .......................................................... 6V FB Pin Current ....................................................... 1mA ELECTRICAL CHARACTERISTICS (Note 1) PARAMETER CONDITION MIN TYP MAX UNITS Maximum Switch Current Limit TA = 0°C to 125°C 1.5 2 3 A TA = < 0°C 1.3 3 A Oscillator Frequency 3.3V < VIN < 25V 1.1 1.25 1.4 MHz q 1.1 1.5 MHz Switch On Voltage Drop ISW = –1.5A, 0°C ≤ TA ≤ 125°C and –1.3A, TA < 0°C 330 400 mV q 500 mV VIN Undervoltage Lockout (Note 3) q 2.47 2.6 2.73 V VIN Supply Current VFB = VNOM + 17% q 1 1.3 mA Shutdown Supply Current VSHDN = 0V, VIN = 25V, VSW = 0V 6 20 µA q 45 µA Feedback Voltage 3V < VIN < 25V, 0.4V < VC < 0.9V LT1767 (Adj) 1.182 1.2 1.218 V (Note 3) q 1.176 1.224 V LT1767-1.8 q 1.764 1.8 1.836 V LT1767-2.5 q 2.45 2.5 2.55 V LT1767-3.3 q 3.234 3.3 3.366 V LT1767-5 q 4.9 5 5.1 V FB Input Current LT1767 (Adj) q – 0.25 – 0.5 µA The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VC = 0.8V, Boost = VIN + 5V, SHDN, SYNC and switch open unless otherwise noted. SYNC Pin Current .................................................. 1mA Operating Junction Temperature Range (Note 2) LT1767E .......................................... – 40 °C to 125°C Storage Temperature Range ................ – 65 °C to 150°C Lead Temperature (Soldering, 10 sec)................. 300 °C PACKAGE/ORDER INFORMATION ORDER PART NUMBER 1 2 3 4 BOOST VIN SW GND 8 7 6 5 SYNC VC FB SHDN TOP VIEW MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 110°C/W LTLS LTWG LTWD LTWE LTWF LT1767EMS8 LT1767EMS8-1.8 LT1767EMS8-2.5 LT1767EMS8-3.3 LT1767EMS8-5 GROUND PIN CONNECTED TO LARGE COPPER AREA MS8 PART MARKING ORDER PART NUMBER TJMAX = 125°C, θJA = 40°C/W LT1767EMS8E LT1767EMS8E-1.8 LT1767EMS8E-2.5 LT1767EMS8E-3.3 LT1767EMS8E-5 EXPOSED GND PAD CONNECTED TO LARGE COPPER AREA ON PCB MS8E PART MARKING LTZG LTZH LTZJ LTZK LTZL 1 2 3 4 BOOST VIN SW GND 8 7 6 5 SYNC VC FB SHDN TOP VIEW MS8E PACKAGE 8-LEAD PLASTIC MSOP Consult LTC Marketing for parts specified with wider operating temperature ranges. |
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