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LTC3603EMSEPBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC3603EMSEPBF Datasheet(HTML) 6 Page - Linear Technology |
6 / 22 page LTC3603 6 3603fa PIN FUNCTIONS INTVCC (Pin 1/Pin 3): Output of Internal 5V LDO. SYNC/MODE (Pin 2/Pin 4): Mode Select and External Clock Synchronization Input. PGOOD (Pin 3/Pin 5): Power Good Output. Open-drain logic output that is pulled to ground when the output volt- age is not within ±10% of regulation point. RT (Pin 4/Pin 6): Frequency Set Pin. ITH (Pin 5/Pin 7): Error Amplifier Compensation Point. VFB (Pin 6/Pin 8): Feedback Pin. SGND (Pin 7, Exposed Pad Pin 17/Pin 9, Exposed Pad Pin 21): Signal Ground. Exposed pad is signal ground and must be soldered to the PCB for rated thermal performance. RUN (Pin 8/Pin 10): Run Control Input. This pin may be tied to PVIN to enable the chip. TRACK/SS (Pin 9/Pin 11): Tracking Input for the Controller or Optional External Soft-Start Input. This pin allows the start-up of VOUT to “track” the external voltage at this pin using an external resistor divider. An external soft-start can be programmed by connecting a capacitor between this pin and ground. Leave this pin floating to use the internal 1ms soft-start clamp. Do not tie this pin to INTVCC or to PVIN. PGND (Pins 10, 11/Pins 12, 13, 14, 15): Power Ground. SW (Pins 12, 13/Pins 16, 17, 18, 19): Switch Node Con- nection to the Inductor. BOOST (Pin 14/Pin 20): Bootstrapped Supply to the Top Side Floating Gate Driver. PVIN (Pins15,16/Pins1,2):PowerInputSupply.Decouple this pin with a capacitor to PGND MSE/UF Package Load Regulation 5V LDO Output Voltage vs Temperature TRACK/SS Current vs Temperature LOAD CURRENT (A) 0 –0.20 –0.10 0 0.10 0.5 1 1.5 2 3603 G18 2.5 3 FIGURE 6 CIRCUIT VIN = 12V TEMPERATURE (°C) –50 4.90 4.92 4.96 4.98 5.00 5.10 5.04 0 50 75 3603 G19 4.94 5.06 5.08 5.02 –25 25 100 125 TEMPERATURE (°C) –50 1.30 1.35 1.40 25 75 3603 G20 1.25 1.20 –25 0 50 100 125 1.15 1.10 TYPICAL PERFORMANCE CHARACTERISTICS |
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