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UCC383TDKTTT-5 Datasheet(PDF) 7 Page - Texas Instruments |
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UCC383TDKTTT-5 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 22 page UCC283-3, UCC283-5, UCC283-ADJ, UCC383-3, UCC383-5, UCC383-ADJ LOW DROPOUT 3A LINEAR REGULATOR FAMILY SLUS215B − OCTOBER 1998 − REVISED FEBRUARY 2004 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION dropout performance Referring to the Block Diagram, the dropout voltage of the UCC383 is equal to the minimum voltage drop (VIN to VOUT) across the N-channel MOSFET. The dropout voltage is dependent on operating conditions such as load current, input and load voltages, as well as temperature. The UCC383 achieves a low Rds(on) through the use of an internal charge-pump (VPUMP) that drives the MOSFET gate. Figure 2 depicts typical dropout voltages versus load current for the 3.3-V and 5-V versions of the part, as well as the adjustable version programmed to 3.0 V. Figure 3 depicts the typical dropout performance of the adjustable version with various output voltages and load currents. Operating temperatures also affect the Rds(on) and dropout voltage of the UCC383. Figure 4 graphs the typical dropout for the 3.3-V and 5-V versions with a 3-A load over temperature. Figure 2 0 0.1 0.2 0.3 0.4 0.5 1 1.5 2 2.5 3 IOUT (A) TYPICAL DROPOUT VOLTAGE vs. LOAD CURRENT VOUT = 3.3 V VOUT = 5 V VOUT = 3 V Figure 3 TYPICAL DROPOUT VOLTAGE vs. IOUT AND VOUT 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 3 3.5 4 4.5 5 IOUT= 3 A IOUT= 1.5 A IOUT= 1 A VOUT (V) |
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Similar Description - UCC383TDKTTT-5 |
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