LM3253_16 datasheet(10/25 Pages) TI1

部品番号	LM3253

部品情報	High-Current Step-Down Converter

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20 s/DIV

IOUT

2V/DIV

1A/DIV

VCON

2V/DIV

VOUT

20 s/DIV

5 mV/DIV

VOUT

50 mA/DIV

IOUT

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

0

2

4

6

8

10

12

INPUT VOLTAGE (V)

20 s/DIV

IOUT

2V/DIV

500 mA/DIV

VCON

2V/DIV

VOUT

3.0

3.5

4.0

4.5

5.0

5.5

6.0

2.50

2.55

2.60

2.65

2.70

2.75

2.80

2.85

2.90

2.95

3.00

INPUT VOLTAGE (V)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

210

220

230

240

250

260

270

280

290

INPUT VOLTAGE (V)

LM3253

SNVS791Q – FEBRUARY 2012 – REVISED MAY 2013

www.ti.com

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Center-Switching Frequency vs. Supply Voltage

Quiescent Current (PFM) vs. Supply Voltage

VOUT = 2.5V, IOUT = 700mA, VIN = 3.8V

VOUT = 1V, 2.7V < VIN< 5.5V (No Load)

Figure 8.

Figure 9.

Quiescent Current (PWM) vs. Supply Voltage

VCON Transient (3G/4G)

VOUT = 2.5V, 2.7V < VIN< 5.5V (No Load)

VOUT = 0V to 3V, RLOAD = 6.8Ω, VIN = 3.8V

Figure 10.

Figure 11.

VCON Transient (2G)

Load Transient in PFM Mode

VOUT = 1.4V to 3.4V, RLOAD = 1.9Ω, VIN = 4.2V

VOUT = 1V, IOUT = 0mA to 60mA, VIN = 3.6V

Figure 12.

Figure 13.

10

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同様の部品番号 - LM3253_16

メーカー	部品番号	データシート	部品情報
Texas Instruments	LM3253	990Kb / 26P	[Old version datasheet] High-Current Step-Down Converter for 2G/3G/4G RF Power Amplifiers
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	LM3253	988Kb / 26P	[Old version datasheet] High-Current Step-Down Converter for 2G/3G/4G RF Power Amplifiers

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