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PDF LM217K Data sheet ( Hoja de datos )

Número de pieza LM217K
Descripción 1.2V TO 37V VOLTAGE REGULATOR
Fabricantes STMicroelectronics 
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No Preview Available ! LM217K Hoja de datos, Descripción, Manual

LM117/217
® LM317
1.2V TO 37V VOLTAGE REGULATOR
s OUTPUT VOLTAGE RANGE : 1.2 TO 37V
s OUTPUT CURRENT IN EXCESS OF 1.5A
s 0.1% LINE AND LOAD REGULATION
s FLOATING OPERATION FOR HIGH
VOLTAGES
s COMPLETE SERIES OF PROTECTIONS :
CURRENT LIMITING, THERMAL
SHUTDOWN AND SOA CONTROL
DESCRIPTION
The LM117/LM217/LM317 are monolithic
integrated circuit in TO-220, ISOWATT220, TO-3
and D2PAK packages intended for use as
positive adjustable voltage regulators.
They are designed to supply more than 1.5A of
load current with an output voltage adjustable
over a 1.2 to 37V range.
The nominal output voltage is selected by means
of only a resistive divider, making the device
exceptionally easy to use and eliminating the
stocking of many fixed regulators.
TO-3
D2PAK
TO-220
ISOWATT220
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Vi-o Input-output Differential Voltage
IO Output Current
Top Operating Junction Temperature for: LM117
LM217
LM317
Ptot Power Dissipation
Tstg Storage Temperature
Value
40
Intenrally Limited
-55 to 150
-25 to 150
0 to 125
Internally Limited
- 65 to 150
Unit
V
oC
oC
oC
oC
THERMAL DATA
Symbol
Parameter
Rthj- ca se Thermal Resistance Junction-case
Rthj-amb Thermal Resistance Junction-ambient
Max
Max
TO-3
4
35
TO-220
3
50
ISOW ATT220
4
60
D2PAK
3
62.5
Unit
oC/W
oC/W
November 1999
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1 page




LM217K pdf
LM117/217/317
to improve the ripple rejection of about 15 dB
(CADJ).
An 1µF tantalium (or 25µFAluminium electrolitic)
capacitor on the output to improve transient
response.
In additional to external capacitors, it is good
practice to add protection diodes, as shown in
fig.5.
D1 protect the device against input short circuit,
while D2 protect against output short circuit for
capacitance discharging.
Figure 5 : Voltage Regulator with Protection Diodes.
D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors discharging
Figure 6 : Slow Turn-on 15V Regulator.
Figure 7 : Current Regulator.
Io
=
Vr ef
R1
+
IADJ
1.25V
R1
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LM217K arduino
LM117/217/317
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 1999 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
.
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