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MAX1742-MAX1842 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX1742-MAX1842 Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 16 page 1A/2.7A, 1MHz, Step-Down Regulators with Synchronous Rectification and Internal Switches _______________________________________________________________________________________ 7 Typical Operating Characteristics (continued) (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) 0.001 0.01 0.1 1 10 MAX1842 EFFICIENCY vs. OUTPUT CURRENT (VIN = 5.0V, L = 2.5 µH) OUTPUT CURRENT (A) VOUT = 1.5V, RTOFF = 1OOk Ω, fPWM = 770kHz VOUT = 1.8V, RTOFF = 75k Ω, fPWM = 910kHz VOUT = 2.5V, RTOFF = 47k Ω, fPWM = 1070kHz 100 95 90 85 80 70 65 60 55 50 75 0.001 0.01 0.1 1 10 MAX1842 EFFICIENCY vs. OUTPUT CURRENT (VIN = 3.3V, L = 1.5 µH) OUTPUT CURRENT (A) VOUT = 2.5V, RTOFF = 56k Ω, fPWM = 1000kHz VOUT = 2.5V, RTOFF = 39k Ω, fPWM = 610kHz VOUT = 1.8V, RTOFF = 43k Ω, fPWM = 1050kHz 100 95 90 85 80 70 65 60 55 50 75 0.001 0.01 0.1 1 10 MAX1842 EFFICIENCY vs. OUTPUT CURRENT (fPWM = 270kHz) IOUT (A) VIN = 3.3V, VOUT = 1.8V, L = 4.7 µH, RTOFF = 160kΩ 100 95 90 85 80 70 65 60 55 50 75 VIN = 5V, VOUT = 1.8V, L = 5.6 µH, RTOFF = 240k Ω MAX1842 NORMALIZED OUTPUT ERROR vs. OUTPUT CURRENT 0.001 0.01 0.1 1 10 OUTPUT CURRENT (A) VIN = 3.3V, VOUT = 1.5V, L = 1.5 µH VIN = 5V, VOUT = 1.5V, L = 2.5 µH 0.1 0 -0.1 -0.2 -0.3 -0.4 0 400 200 800 600 1000 1200 0 1.0 1.5 0.5 2.0 2.5 3.0 MAX1842 SWITCHING FREQUENCY vs. OUTPUT CURRENT OUTPUT CURRENT (A) VIN = 5V, VOUT = 2.5V, L = 2.5 µH VIN = 3.3V, VOUT = 1.5V, L = 1.5 µH VIN = 5V, VOUT = 1.5V, L = 2.5 µH 0 0 0 0 MAX1842 STARTUP AND SHUTDOWN VSS 2V/div MAX1842 toc16 VSHDN 5V/div ROUT = 0.5 Ω, RTOFF = 56kΩ VIN = 3.3V, VOUT = 1.5V IINPUT 1A/div VOUTPUT 1V/div 1ms/div |
Similar Part No. - MAX1742-MAX1842 |
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Similar Description - MAX1742-MAX1842 |
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