TPS53321RGTT datasheet(8/25 Pages) TI

Part #	TPS53321RGTT

Description	5-A Step-Down Regulator with Integrated Switcher

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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8 / 25 page

70

75

80

85

90

95

100

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Output Current (A)

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.5 V

VOUT = 1.8 V

VOUT = 2.5 V

Skip Mode

VIN = 3.3 V

70

75

80

85

90

95

100

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Output Current (A)

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.5 V

VOUT = 1.8 V

VOUT = 2.5 V

FCCM

VIN = 3.3 V

70

75

80

85

90

95

100

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Output Current (A)

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.5 V

VOUT = 1.8 V

VOUT = 2.5 V

VOUT = 3.3 V

Skip Mode

VIN = 5 V

70

75

80

85

90

95

100

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Output Current (A)

VOUT = 1.0 V

VOUT = 1.2 V

VOUT = 1.5 V

VOUT = 1.8 V

VOUT = 2.5 V

VOUT = 3.3 V

FCCM

VIN = 5 V

0.580

0.585

0.590

0.595

0.600

0.605

0.610

0.615

0.620

−40 −25 −10

5

20

35

50

65

80

95

110 125

Temperature (°C)

−0.5

−0.3

−0.1

0.1

0.3

0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

Output Current (A)

VIN = 3.3 V

VIN = 5.0 V

TPS53321

SLUSAF3 – DECEMBER 2010

www.ti.com

TYPICAL CHARACTERISTICS

Inductor PCMC065T-1R0 (1 µH, 5.6 m

Ω) is used.

Figure 1. Efficiency vs. Output Current, Skip Mode,

Figure 2. Efficiency vs. Output Current, FCCM, VIN = 3.3 V

VIN = 3.3 V

Figure 3. Efficiency vs. Output Current, Skip Mode,

Figure 4. Efficiency vs. Output Current, FCCM,

VIN = 5 V

Figure 5. Feedback Voltage vs. Ambient Temperature

Figure 6. Output Voltage Change vs. Output Current

8

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