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TPS2834 Datasheet(PDF) 11 Page - Texas Instruments |
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TPS2834 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 17 page TPS2832, TPS2833 FAST SYNCHRONOUSBUCK MOSFET DRIVERS WITH DEADTIME CONTROL SLVS195C − FEBRUARY 1999 − REVISED JANUARY 2001 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION Figure 16 shows the circuit schematic of a 100-kHz synchronous-buck converter implemented with a TL5001A pulse-width-modulation (PWM) controller and a TPS2833 driver. The converter operates over an input range from 4.5 V to 12 V and has a 3.3 V output. The circuit can supply 3 A continuous load and the transient load is 5 A. The converter achieves an efficiency of 94% for VIN = 5 V, Iload=1 A, and 93% for Vin = 5 V, Iload = 3 A. C14 1 µF R9 90.9 k Ω R8 121 k Ω C9 0.22 µF VCC RT FB COMP GND OUT DTC SCP U2 TL5001A 1 2 6 5 8 3 4 7 C1 1 µF R10 1.0 k Ω R2 1.6 k Ω C2 0.033 µF C3 0.0022 µF C8 0.1 µF C4 0.022 µF R3 180 Ω R4 2.32 k Ω GND Q2 Si4410 R7 3.3 Ω C6 1000 pF VIN C5 100 µF C10 100 µF C11 0.47 µF 3.3 V C13 10 µF C7 100 µF C12 100 µF Q1 Si4410 L1 27 µH U1 TPS2833 R1 1 k Ω C15 1.0 µF R6 1 M Ω R5 0 Ω R11 4.7 Ω RTN PGND LOWDR BOOTLO HIGHDR BOOT IN DT VCC 1 2 3 4 8 7 6 5 + + + + Figure 16. 3.3 V 3 A Synchronous-Buck Converter Circuit |
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