TPS53819A datasheet(11/43 Pages) TI

Part #	TPS53819A

Description	High-Performance, Eco-mode, Single Synchronous Step-Down Controller with PMBus

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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V

IN = 12 V, V OUT = 1.2 V, 425 kHz, DCM

V

OUT (50 mV/div)

SW (10 V/div)

IL (5 A/div)

Time (0.1 ms/div)

V

IN = 12 V, V OUT = 1.2 V, 425 kHz , DCM

V

OUT (50 mV/div)

SW (10 V/div)

I

L (5 A/div)

Time (0.1 ms/div)

V

IN = 12 V, V OUT = 1.2 V

I

OUT = 0 A, 425 kHz, FCCM

VOUT (50 mV/div)

SW (10 V/div)

I

L (5 A/div)

Time (2 µs/div)

V

IN = 12 V, V OUT = 1.2 V

I

OUT = 0 A, 425 kHz, DCM

VOUT (50 mV/div)

SW (10 V/div)

IL (5 A/div)

Time (1 µs/div)

V

IN = 12 V, V OUT = 1.2 V

I

OUT = 0 A

425 kHz, DCM

VIN (5 V/div)

V

OUT (0.5 V/div)

VREG (5 V/div)

PGOOD (5 V/div)

Time (2 ms/div)

V

IN = 12 V, V OUT = 1.2 V

I

OUT = 20 A, 425 kHz

VIN (5 V/div)

V

OUT (0.5 V/div)

VREG (5 V/div)

PGOOD (5 V/div)

Time (2 ms/div)

TPS53819A

www.ti.com

SLUSB56 – NOVEMBER 2012

TYPICAL CHARACTERISTICS (continued)

Figure 13. No-Load UVLO Start-Up Waveforms

Figure 14. Full-Load UVLO Start-Up Waveforms

Figure 15. 1.2-V Output Ripple with FCCM

Figure 16. 1.2-V Output Ripple with DCM

Figure 17. CCM to DCM Transitions

Figure 18. DCM to CCM Transitions

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