TPS56121DQPR datasheet(9/22 Pages) TI1

Part #	TPS56121DQPR

Description	4.5-V to 14-V Input High-Current Synchronous Buck Converter

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Manufacturer	TI1 [Texas Instruments]

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Junction Temperature (°C)

VVDD = 4.5 V

VVDD = 12 V

450

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Junction Temperature (°C)

VOV

VUV

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0

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Load Current (A)

VOUT = 0.8 V

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.8 V

VOUT = 2.5 V

VOUT = 3.3 V

fSW = 500 kHz

VVIN = 12 V

TA = 25°C

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Load Current (A)

VOUT = 0.8 V

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.8 V

VOUT = 2.5 V

fSW = 500 kHz

VVIN = 5 V

TA = 25°C

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Ambient Temperature (°C)

VOUT = 0.8 V

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.8 V

VOUT = 2.5 V

VOUT = 3.3 V

VVIN = 12 V

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Ambient Temperature (°C)

VOUT = 0.8 V

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.8 V

VOUT = 2.5 V

VVIN = 5 V

TPS56121

www.ti.com

SLUSAH4

– MARCH 2011

TYPICAL CHARACTERISTICS

The efficiency curve shown in Figure 15 is measured with a 0.5-

µH output inductor and a maximum DCR of 0.75 mΩ.

The efficiency curve shown in Figure 16 is measured with a 0.3-

µH output inductor and a maximum DCR of 0.54 mΩ.

The power derating curves shown in Figure 17 and Figure 18 are measured on a 4

" × 3.25", 0.062" thick FR4 board

with 6 layers and 1 oz. copper.

Figure 13. High-Side Overcurrent Threshold vs. Junction

Figure 14. Power Good Threshold Voltage vs. Junction

Temperature

Figure 15. Efficiency vs. Load Current (VVIN = 12 V)

Figure 16. Efficiency vs. Load Current (VVIN = 5 V)

Figure 17. Output Current vs. Ambient Temperature

Figure 18. Output Current vs. Ambient Temperature

(VVIN = 12 V)

(VVIN = 5 V)

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