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LM3248TMENOPB Fiches technique(PDF) 13 Page - Texas Instruments

No de pièce LM3248TMENOPB
Description  LM3248 2.7 MHz, 2.5A Adjustable Boost-Buck DC/DC Converter
Download  31 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3248TMENOPB Fiches technique(HTML) 13 Page - Texas Instruments

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VCON
IOUT
1V/DIV
500mV/DIV
200mA/DIV
20µS/DIV
TRISE = 6.8µS
TFALL = 6.2µS
VOUT
IOUT
10mV/DIV
20mA/DIV
20µS/DIV
VOUT_AC
ENA
1V/DIV
2V/DIV
500mV/DIV
BOOST_GATE
20µS/DIV
2V/DIV
VCON
VOUT
VBUCK_OUT
VCON
IOUT
1V/DIV
500mV/DIV
50mA/DIV
20µS/DIV
TRISE = 7.8µS
TFALL = 7.6µS
40µS/DIV
1A/DIV
2V/DIV
2V/DIV
SW_BUCK
VOUT
IL (Buck)
ENA
1V/DIV
2V/DIV
500mV/DIV
BOOST_GATE
2V/DIV
VCON
VOUT
20µS/DIV
LM3248
www.ti.com
SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013
TYPICAL CHARACTERISTICS (continued)
For all Efficiency vs Load Current graphs, L1=1276AS-H-1R0N, L3=1285AS-H-1R5N.
Startup in Auto-Boost Mode
VBATT=2.7V, Load=200 mA, MODE=2G, VOUT=0.4↔4V,
Timed Output Current Limit into Short Circuit
TR=TF=10µS
VBATT=4.3V, VOUT=2.5V, Load=6.8Ω/Short to GND
Figure 21.
Figure 22.
VCON Transient Response
VCON Transient with Boost Active
VBATT=3.8V, VOUT= 0.8V↔3.3V, MODE=LOW
VBATT=3.2V, MODE=2G, VOUT= 0.4↔4 V, Load=11.4Ω
BOOST_GATE=LOW, Load=20
Ω, TR=TF=10µS
Figure 23.
Figure 24.
VCON Transient Response
VCON Transient Response
VBATT=3.8V, VOUT= 1.4V↔3.4V, MODE=LOW
VBATT=3.8V, VOUT=1.0V, MODE=LOW
BOOST_GATE=LOW, Load=6.8
Ω, TR=TF=10µS
BOOST_GATE=LOW, Load=0A
↔60mA, TR=TF=10µS
Figure 25.
Figure 26.
Copyright © 2013, Texas Instruments Incorporated
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