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LM2623 Datasheet(PDF) 5 Page - Texas Instruments |
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LM2623 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 16 page 2.000 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 - 40 - 30 - 20 - 10 0 10 20 30 40 50 60 70 80 Temperature (ºC) 2A 1A 0.000 0.050 0.100 0.150 0.200 0.250 0.300 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 Temperature (ºC) -50 0 50 100 Temperatur e 0.800 0.90 0 1.00 0 1.100 1.20 0 1.30 0 1.2 1.7 2.2 2.7 3.2 3.7 4.2 Vin (V) 0 0.5 1 1.5 2 300k 225k 150 75k V DD = 3.3V TEMPERATURE (ºC) -40 -25 -10 5 20 35 50 65 80 1.2365 1.236 1.2355 1.235 1.2345 1.234 1.2335 1.233 1.2325 300mA 600mA 10mA 60.0 65.0 70.0 75.0 80.0 85.0 90.0 95.0 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2 4.5 Vin LM2623 www.ti.com SNVS188G – MAY 2004 – REVISED DECEMBER 2005 Typical Performance Characteristics Efficiency VFB vs vs VIN Temperature VOUT = 5.0V Frequency vs VIN Maximum Start Up Voltage vs Temperature Typical RDS(ON) vs Typical Current Limit vs Temperature Temperature Detailed Description OPERATING PRINCIPLE The LM2623 is designed to provide step-up DC-DC voltage regulation in battery-powered and low-input voltage systems. It combines a step-up switching regulator, N-channel power MOSFET, built-in current limit, thermal limit, and voltage reference in a single 8-pin MSOP package Figure 3. The switching DC-DC regulator boosts an input voltage between .8V and 14V to a regulated output voltage between 1.24V and 14V. The LM2623 starts from a low 1.1V input and remains operational down to below .8V. This device is optimized for use in cellular phones and other applications requiring a small size, low profile, as well as low quiescent current for maximum battery life during stand-by and shutdown. A high-efficiency gated- oscillator topology offers an output of up to 2A at low output voltages. Additional features include a built-in peak switch current limit, and thermal protection circuitry. Copyright © 2004–2005, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2623 |
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