參數(shù)資料
型號(hào)： LM5010SDX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, DSO10
封裝： 4 X 4 MM, LLP-10
文件頁數(shù)： 3/19頁
文件大?。?/td> 453K
代理商： LM5010SDX
Pin Description
PIN NUMBER
LLP-10
1
NAME
SW
DESCRIPTION
APPLICATION INFORMATION
Internally connected to the buck switch source.
Connect to the inductor, free-wheeling diode, and
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.
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.
Re-circulating current flows into this pin to the
current sense resistor.
Ground for all internal circuitry other than the current
limit detection.
Internally connected to the regulation and
over-voltage comparators. The regulation level is
2.5V.
An internal 11.5 μA current source charges an
external capacitor to 2.5V, providing the softstart
function.
An external resistor from V
IN
to this pin sets the
buck switch on-time. Grounding this pin shuts down
the 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
.
Nominal input range is 8.0V to 75V.
No internal connection.
TSSOP-14
2
Switching Node
2
3
BST
Boost pin for bootstrap capacitor
3
4
I
SEN
Current sense
4
5
S
GND
Sense Ground
5
6
RTN
Circuit Ground
6
9
FB
Feedback input from the
regulated output
7
10
SS
Softstart
8
11
R
ON
/SD
On-time control and shutdown
9
12
V
CC
Output from the startup regulator
10
13
V
IN
NC
Input supply voltage
No connection.
1,7,8,14
L
www.national.com
3
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