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LM27241 データシート(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM27241
部品情報  Synchronous Buck Regulator Controller for Mobile Systems
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM27241 データシート(HTML) 5 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Voltages from the indicated pins to SGND/PGND unless
otherwise indicated (Note 2):
VIN
-0.3V to 30V
V5
-0.3V to 7V
VDD
-0.3V to 7V
BOOT
-0.3V to 36V
BOOT to SW
-0.3V to 7V
SW
-0.3V to 30V
ILIM
-0.3V to 30V
SENSE, FB
-0.3V to 7V
PGOOD
-0.3V to 7V
EN
-0.3V to 7V
Power Dissipation (T
A = 25˚C)
(Note 3)
0.75W
Junction Temperature
+150˚C
ESD Rating (Note 4)
2kV
Ambient Storage Temperature
Range
-65˚C to +150˚C
Soldering Dwell Time,
Temperature
Wave
Infrared
Vapor Phase
4 sec, 260˚C
10 sec, 240˚C
75 sec, 219˚C
Operating Ratings (Note 1)
VIN
5.5V to 28V
VDD, V5
4.5V to 5.5V
Junction Temperature
-5˚C to +125˚C
Electrical Characteristics
Specifications with standard typeface are for T
J = 25˚C, and those with boldface apply over full Operating Junction Tempera-
ture range. VDD = V5 = 5V, V
SGND =VPGND = 0V, VIN = 15V, VEN = 3V, RFADJ = 22.1K unless otherwise stated (Note 5).
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typical
(Note 7)
Max
Units
Reference
V
FB_REG
FB Pin Voltage at
Regualtion
VDD = 4.5V to 5.5V,
VIN = 5.5V to 28V
591
600
609
mV
V
FB_LINE REG
V
FB Line Regulation
VDD = 4.5V to 5.5V,
VIN = 5.5V to 28V
0.5
I
FB
FB Pin Current (sourcing)
V
FB at regulation
20
100
nA
Chip Supply
I
Q_VIN
VIN Quiescent Current
V
FB = 0.7V
100
200
µA
I
SD_VIN
VIN Shutdown Current
V
EN =0V
0
5
µA
I
Q_VDD
VDD Quiescent Current
V
FB= 0.7V
1.75
3
mA
I
SD_VDD
VDD Shutdown Current
V
EN =0V
8
15
µA
I
Q_V5
V5 Normal Operating
Current
V
FB = 0.7V
0.3
0.5
mA
V
FB = 0.5V
0.5
1.25
I
SD_V5
V5 Shutdown Current
V
EN =0V
0
5
µA
I
Q_BOOT
BOOT Quiescent Current
V
FB = 0.7V
2
5
µA
V
FB = 0.5V
300
500
I
SD_BOOT
BOOT Shutdown Current
V
EN =0V
1
5
µA
V
DD_UVLO
VDD UVLO Threshold
VDD rising from 0V
3.9
4.2
4.5
V
HYS
VDD_UVLO
VDD UVLO Hysteresis
VDD = V5 falling from
V
DD_UVLO
0.5
0.7
0.9
V
Logic
I
EN
EN Input Current
V
EN =0to5V
0
µA
V
EN_HI
EN Input Logic High
2
1.8
V
V
EN_LO
EN Input Logic Low
1.3
0.8
V
R
FPWM
FPWM Pull-down
V
FPWM =2V
100
200
1000
k
V
FPWM_HI
FPWM Input Logic High
2
1.8
V
VFPWM_LO
FPWM Input Logic Low
1.3
0.8
V
www.national.com
5


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