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LM3253 데이터시트(PDF) 10 Page - Texas Instruments

부품명 LM3253
상세설명  High-Current Step-Down Converter for 2G/3G/4G RF Power Amplifiers
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

LM3253 데이터시트(HTML) 10 Page - Texas Instruments

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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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