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LM5010MH データシート(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部品番号 LM5010MH
部品情報  High Voltage 1A Step Down Switching Regulator
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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)

LM5010MH データシート(HTML) 3 Page - National Semiconductor (TI)

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Pin Description
PIN NUMBER
NAME
DESCRIPTION
APPLICATION INFORMATION
LLP-10
TSSOP-14
1
2
SW
Switching Node
Internally connected to the buck switch source.
Connect to the inductor, free-wheeling diode, and
bootstrap capacitor.
2
3
BST
Boost pin for bootstrap capacitor
Connect a 0.022 µF capacitor from SW to this pin.
The capacitor is charged from V
CC via an internal
diode during each off-time.
34
I
SEN
Current sense
The re-circulating current flows through the internal
sense resistor, and out of this pin to the
free-wheeling diode. Current limit is nominally set at
1.25A.
45
S
GND
Sense Ground
Re-circulating current flows into this pin to the
current sense resistor.
5
6
RTN
Circuit Ground
Ground for all internal circuitry other than the current
limit detection.
6
9
FB
Feedback input from the
regulated output
Internally connected to the regulation and
over-voltage comparators. The regulation level is
2.5V.
7
10
SS
Softstart
An internal 11.5 µA current source charges an
external capacitor to 2.5V, providing the softstart
function.
811
R
ON/SD
On-time control and shutdown
An external resistor from V
IN to this pin sets the
buck switch on-time. Grounding this pin shuts down
the regulator.
912
V
CC
Output from the startup regulator
Nominally regulates at 7.0V. An external voltage
(7.5V-14V) can be applied to this pin to reduce
internal dissipation. An internal diode connects V
CC
to V
IN.
10
13
V
IN
Input supply voltage
Nominal input range is 8.0V to 75V.
1,7,8,14
NC
No connection.
No internal connection.
www.national.com
3


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