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LTC3444 Datasheet(PDF) 2 Page - Linear Technology |
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LTC3444 Datasheet(HTML) 2 Page - Linear Technology |
2 / 20 page 2 LTC3444 3444fb Consult LTC Marketing for parts specified with wider operating temperature ranges. ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) LTC3444EDD ORDER PART NUMBER DD PART MARKING LBVZ TJMAX = 125°C, θJA = 43°C/W, 4-LAYER BOARD θJC = 2.96°C/W EXPOSED PAD IS GND (PIN 9) MUST BE SOLDERED TO PCB The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VIN = VOUT = 3.6V unless otherwise noted. ELECTRICAL CHARACTERISTICS VIN,VOUT Voltages .......................................... –0.3 to 6V SW1,SW2 Voltages DC .................................. –0.3 to 6V Pulsed <100ns ............... –0.3 to 7V SHDN Voltage ................................................ –0.3 to 6V Operating Temperature (Note 2) .............. –40 °C to 85°C Maximum Junction Temperature (Note 4) ............ 125 °C Storage Temperature Range .................. –65 °C to 125°C PARAMETER CONDITIONS MIN TYP MAX UNITS Input Start-Up Voltage ● 2.55 2.65 2.75 V Output Voltage Adjust Range ● 0.5 5 V Feedback Voltage ● 1.19 1.22 1.25 V Feedback Input Current VFB = 1.22V 1 50 nA Quiescent Current - Shutdown SD = 0V, VOUT = 0V Not Including Switch Leakage 0.1 1 μA Quiescent Current - Active (Note 3) 700 1100 μA NMOS Switch Leakage Switches B and C 0.1 7 μA PMOS Switch Leakage Switches A and D 0.1 10 μA NMOS Switch On Resistance Switches B and C 0.19 Ω PMOS Switch On Resistance Switches A and D 0.22 Ω PMOS Switch On Resistance Switch D VIN = 3.6, VOUT = 1V 0.4 Ω Input Current Limit ● 2.5 3.5 A Reverse Current Limit ● 3A Max Duty Cycle Boost (%Switch C On) ● 70 82 % Buck (% Switch A On) ● 100 % Min Duty Cycle ● 0% Frequency Accuracy ● 1.2 1.5 1.8 MHz Error Amp AVOL 65 dB Error Amp Source Current VC = 1.5V, FB = 0V 8 μA Error Amp Sink Current VC = 1.5V, FB = 1.5V 230 μA Internal Soft-Start Time SHDN Going High 250 μs Output OV Threshold ● 5.1 5.3 5.5 V 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/ TOP VIEW DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN 5 6 7 8 4 3 2 1 9 SHDN SW1 GND SW2 FB VC VIN VOUT |
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