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LM2727 Fiches technique(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No de pièce LM2727
Description  N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2727 Fiches technique(HTML) 3 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.
V
CC
7V
BOOTV
21V
Junction Temperature
150˚C
Storage Temperature
−65˚C to 150˚C
Soldering Information
Lead Temperature
(soldering, 10sec)
260˚C
Infrared or Convection (20sec)
235˚C
ESD Rating
2 kV
Operating Ratings
Supply Voltage (V
CC)
4.5V to 5.5V
Junction Temperature Range
−40˚C to +125˚C
Thermal Resistance (
θ
JA)
155˚C/W
Electrical Characteristics
V
CC = 5V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA=TJ=+25˚C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design,
test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
FB_ADJ
FB Pin Voltage
V
CC = 4.5V, 0˚C to +125˚C
0.591
0.6
0.609
V
V
CC = 5V, 0˚C to +125˚C
0.591
0.6
0.609
V
CC = 5.5V, 0˚C to +125˚C
0.591
0.6
0.609
V
CC = 4.5V, −40˚C to +125˚C
0.589
0.6
0.609
V
CC = 5V, −40˚C to +125˚C
0.589
0.6
0.609
V
CC = 5.5V, −40˚C to +125˚C
0.589
0.6
0.609
V
ON
UVLO Thresholds
Rising
Falling
4.2
3.6
V
I
Q-V5
Operating V
CC Current
SD = 5V, FB = 0.55V
Fsw = 600kHz
1
1.5
2
mA
SD = 5V, FB = 0.65V
Fsw = 600kHz
0.8
1.7
2.2
Shutdown V
CC Current
SD = 0V
0.15
0.4
0.7
mA
t
PWGD1
PWGD Pin Response Time
FB Voltage Going Up
6
µs
t
PWGD2
PWGD Pin Response Time
FB Voltage Going Down
6
µs
I
SD
SD Pin Internal Pull-up Current
20
µA
I
SS-ON
SS Pin Source Current
SS Voltage = 2.5V
0˚C to +125˚C
-40˚C to +125˚C
8
5
11
11
15
15
µA
I
SS-OC
SS Pin Sink Current During Over
Current
SS Voltage = 2.5V
95
µA
I
SEN-TH
I
SEN Pin Source Current Trip
Point
0˚C to +125˚C
-40˚C to +125˚C
35
28
50
50
65
65
µA
ERROR AMPLIFIER
GBW
Error Amplifier Unity Gain
Bandwidth
5
MHz
G
Error Amplifier DC Gain
60
dB
SR
Error Amplifier Slew Rate
6
V/µA
I
FB
FB Pin Bias Current
FB = 0.55V
FB = 0.65V
0
0
15
30
100
155
nA
I
EAO
EAO Pin Current Sourcing and
Sinking
V
EAO = 2.5, FB = 0.55V
V
EAO = 2.5, FB = 0.65V
2.8
0.8
mA
V
EA
Error Amplifier Maximum Swing
Minimum
Maximum
1.2
3.2
V
www.national.com
3


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