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LM2647 데이터시트(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
부품명 LM2647
상세설명  Dual Synchronous Buck Regulator Controller
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - 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
30V
V5
7V
VDD
7V
BOOT1, BOOT2
36V
BOOT1 to SW1, BOOT2 to
SW2
7V
SW1, SW2
30V
ILIM1, ILIM2
30V
SENSE1, SENSE2, FB1, FB2
7V
PGOOD
7V
EN
7V
Power Dissipation (T
A = 25˚C)
(Note 3)
1.0W
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)
Symbol
Parameter
Conditions
Min
(Note 6)
Typical
(Note 7)
Max
(Note 6)
Units
Reference
V
FB_REG
FB Pin Voltage at Regualtion
(either FB Pin)
VDD = 4.5V to 5.5V,
VIN = 5.5V to 28V
591
600
609
mV
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
FB1 =VFB2 = 0.7V
100
200
µA
I
SD_VN
VIN Shutdown Current
V
EN =0V
0
5
µA
I
Q_VDD
VDD Quiescent Current
V
FB1 =VFB2 = 0.7V
2.5
4
mA
I
SD_VDD
VDD Shutdown Current
V
EN =0V
8
15
µA
I
Q_V5
V5 Normal Operating Current
V
FB1 =VFB2 = 0.7V
0.3
0.5
mA
V
FB1 =VFB2 = 0.5V
1
1.5
I
SD_V5
V5 Shutdown Current
V
EN =0V
0
5
µA
I
Q_BOOT
BOOT Quiescent Current
V
FB1 =VFB2 = 0.7V
2
5
µA
V
FB1 =VFB2 = 0.5V
300
500
I
SD_BOOT
BOOT Shutdown Current
V
EN =0V
1
5
µA
V
UVLO
VDD UVLO Threshold
VDD rising from 0V
3.9
4.2
4.5
V
VDD UVLO Hysteresis
VDD = V5 falling from V
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
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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