LM3281_15 datasheet(7/26 Pages) TI

部件名	LM3281

功能描述	LM3281 3.3-V, 1.2-A, 6-MHz Miniature Step-Down DC-DC Converter for Wireless Connectivity Solutions

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制造商	TI [Texas Instruments]

网页	http://www.ti.com

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7 / 26 page

VOUT (V)

20 mV/DIV

Time (4 µs/DIV)

SW (V)

2 V/DIV

Vin (V)

2.5

3

3.5

4

4.5

5

5.5

0

2

4

6

8

10

12

14

PWM-Bypass Transition

D011

Load Current (mA)

0

20

40

60

80

100

120

140

160

0

10

20

30

40

50

60

70

80

90

100

D003

VIN = 3.4 V

VIN = 3.8 V

VIN = 4.8 V

VIN = 5.5 V

Vin (V)

2.5

3

3.5

4

4.5

5

5.5

0

5

10

15

20

25

D012

Output Current (mA)

0

10

20

30

40

50

60

70

80

45

50

55

60

65

70

75

80

85

90

95

100

D001

VIN = 3.4 V

VIN = 3.8 V

VIN = 4.2 V

VIN = 4.8 V

VIN = 5.5 V

Output Current (A)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

80

85

90

95

100

D002

VIN = 3.4 V

VIN = 3.8 V

VIN = 4.8 V

VIN = 5.5 V

LM3281

www.ti.com

SNVSA38 – NOVEMBER 2014

6.7 Typical Characteristics

All curves are at TA = 25°C and VIN = 3.8 V, unless otherwise specified. CIN, COUT = 2.2 µF, CLOAD2 = 4.7 µF, CLOAD1 = 10 µF,

LSW = 0.47 µH.

Figure 2. ECO Efficiency vs Output Current

Figure 3. PWM Efficiency vs Output Current

Figure 4. Forced PWM Efficiency vs Output Current

Figure 5. No Load ECO Input Current vs VIN

IOUT = 10 mA

Figure 6. No Load Forced PWM Input Current vs VIN

Figure 7. Output Voltage Ripple in ECO Mode

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Product Folder Links: LM3281

类似零件编号 - LM3281_15

制造商	部件名	数据表	功能描述
Texas Instruments	LM3281YFQR	1Mb / 26P	[Old version datasheet] 3.3-V, 1.2-A, 6-MHz Miniature Step-Down DC-DC Converter

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类似说明 - LM3281_15

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