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LTC4264 Datasheet(PDF) 2 Page - Linear Technology |
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LTC4264 Datasheet(HTML) 2 Page - Linear Technology |
2 / 24 page LTC4264 2 4264f PACKAGE/ORDER INFORMATION ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS VIN Voltage................................................. 0.3V to –90V VOUT Voltage ......... VIN + 90V (and ≤ GND) to VIN – 0.3V SHDN Voltage ............................ VIN + 90V to VIN – 0.3V RCLASS, ILIM_EN Voltage ............... VIN + 7V to VIN – 0.3V PWRGD Voltage (Note 3) Low Impedance Source ....VOUT + 11V to VOUT – 0.3V Current Fed ..........................................................5mA PWRGD Voltage ......................... VIN + 80V to VIN – 0.3V PWRGD Current.....................................................10mA RCLASS Current.....................................................100mA Operating Ambient Temperature Range LTC4264C ................................................ 0°C to 70°C LTC4264I ............................................. –40°C to 85°C Junction Temperature ........................................... 150°C Storage Temperature Range................... –65°C to 150°C (Notes 1, 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Supply Voltage IEEE 802.3af System Signature Range Classification Range UVLO Turn-On Voltage UVLO Turn-Off Voltage Voltage with Respect to GND Pin (Notes 5, 6, 7, 8) ● ● ● ● ● –1.5 –12.5 –37.7 –29.8 –38.9 –30.6 –57 –10.1 –21 –40.2 –31.5 V V V V V IIN_ON IC Supply Current when On VIN = –54V ● 3mA IIN_CLASS IC Supply Current During Classification VIN = –17.5V (Note 9) ● 0.55 0.62 0.70 mA ΔICLASS Current Accuracy During Classification 10mA < ICLASS < 75mA, –12.5V ≤ VIN ≤ –21V (Notes 10,11) ● ±3.5 % tCLASSRDY Classification Stability Time VIN Stepped 0V to –17.5V, IIN_CLASS ≤3.5% of Ideal, 10mA < ICLASS < 75mA (Notes 10, 11) ● 1ms RSIGNATURE Signature Resistance –1.5V ≤ VIN ≤ –10.1V, IEEE 802.3af 2-Point Measurement, SHDN Tied to VIN (Notes 6, 7) ● 23.25 26.00 k Ω RINVALID Invalid Signature Resistance –1.5V ≤ VIN ≤ –10.1V, IEEE 802.3af 2-Point Measurement, SHDN Tied to GND (Notes 6, 7) ● 10 11.8 k Ω VIH_SHDN SHDN High Level Input Voltage With Respect to VIN, High Level = Shutdown (Note 12) ● 357 V VIL_SHDN SHDN Low Level Input Voltage With Respect to VIN ● 0.45 V RINPUT_SHDN SHDN Input Resistance With Respect to VIN ● 100 kΩ VIH_ILIM ILIM_EN High Level Input Voltage With Repect to VIN, High Level Enables Current Limit (Note 13) ● 4V 12 11 10 9 8 7 1 2 3 4 5 6 GND NC PWRGD PWRGD VOUT VOUT SHDN NC RCLASS ILIM_EN VIN VIN TOP VIEW 13 DE12 PACKAGE 12-LEAD (4mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 43°C/W, θJC = 4.3°C/W EXPOSED PAD (PIN 13) MUST BE SOLDERED TO AN ELECTRICALLY ISOLATED HEAT SINK ORDER PART NUMBER DE PART MARKING* LTC4264CDE LTC4264IDE 4264 4264 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. *The temperature grade is identified by a label on the shipping container. The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) |
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