TPS56121_15 datasheet(9/31 Pages) TI

No de pièce	TPS56121

Description	TPS56121 4.5-V to 14-V Input High-Current Synchronous Buck Converter

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Fabricant	TI [Texas Instruments]

Site Internet	http://www.ti.com

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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

VOUT = 3.3 V

VVIN = 5 V

G001

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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

VOUT = 3.3 V

fSW = 500 kHz

VVIN = 5 V

TA = 25°C

G001

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Junction Temperature (°C)

VVDD = 4.5 V

VVDD = 12 V

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Junction Temperature (°C)

VOV

VUV

TPS56121

www.ti.com

SLUSAH4C – MARCH 2011 – REVISED JANUARY 2015

Typical Characteristics (continued)

Figure 15 through Figure 18 are measured on a 2.5-inch × 2.5-inch × 0.062-inch FR4 board with 4 layers and 2

oz. copper, a 0.44-µH output inductor and a DCR of 0.32 m

Ω.

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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