LM117H-MW8 National Semiconductor Corporation, LM117H-MW8 Datasheet

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LM117H-MW8

Manufacturer Part Number
LM117H-MW8
Description
3-terminal Adjustable Regulator
Manufacturer
National Semiconductor Corporation
Datasheet
© 2007 National Semiconductor Corporation
LM117/LM317A/LM317
3-Terminal Adjustable Regulator
General Description
The LM117 series of adjustable 3-terminal positive voltage
regulators is capable of supplying in excess of 1.5A over a
1.2V to 37V output range. They are exceptionally easy to use
and require only two external resistors to set the output volt-
age. Further, both line and load regulation are better than
standard fixed regulators. Also, the LM117 is packaged in
standard transistor packages which are easily mounted and
handled.
In addition to higher performance than fixed regulators, the
LM117 series offers full overload protection available only in
IC's. Included on the chip are current limit, thermal overload
protection and safe area protection. All overload protection
circuitry remains fully functional even if the adjustment termi-
nal is disconnected.
Normally, no capacitors are needed unless the device is sit-
uated more than 6 inches from the input filter capacitors in
which case an input bypass is needed. An optional output ca-
pacitor can be added to improve transient response. The
adjustment terminal can be bypassed to achieve very high
ripple rejection ratios which are difficult to achieve with stan-
dard 3-terminal regulators.
Besides replacing fixed regulators, the LM117 is useful in a
wide variety of other applications. Since the regulator is “float-
ing” and sees only the input-to-output differential voltage,
supplies of several hundred volts can be regulated as long as
Typical Applications
Full output current not available at high input-output voltages
of 1μF to 1000μF of aluminum or tantalum electrolytic are commonly used
to provide improved output impedance and rejection of transients.
*Needed if device is more than 6 inches from filter capacitors.
†Optional—improves transient response. Output capacitors in the range
1.2V–25V Adjustable Regulator
9063
906301
the maximum input to output differential is not exceeded, i.e.,
avoid short-circuiting the output.
Also, it makes an especially simple adjustable switching reg-
ulator, a programmable output regulator, or by connecting a
fixed resistor between the adjustment pin and output, the
LM117 can be used as a precision current regulator. Supplies
with electronic shutdown can be achieved by clamping the
adjustment terminal to ground which programs the output to
1.2V where most loads draw little current.
For applications requiring greater output current, see LM150
series (3A) and LM138 series (5A) data sheets. For the neg-
ative complement, see LM137 series data sheet.
Features
SOT-223 vs. TO-252 (D-Pak)
Packages
LM117, LM317A, LM317
Guaranteed 1% output voltage tolerance (LM317A)
Guaranteed max. 0.01%/V line regulation (LM317A)
Guaranteed max. 0.3% load regulation (LM117)
Guaranteed 1.5A output current
Adjustable output down to 1.2V
Current limit constant with temperature
P
80 dB ripple rejection
Output is short-circuit protected
+
LM317A, LM317
LM317A, LM317
Product Enhancement tested
LM117, LM317
LM117/LM317A/LM317 Package Options
Number
LM317
LM317
LM117
Part
Scale 1:1
Suffix
EMP
MDT
K
S
H
E
T
Package
SOT-223
TO-220
TO-263
TO-252
TO-39
TO-3
LCC
906354
www.national.com
April 2007
Current
Output
1.5A
1.5A
1.5A
1.0A
0.5A
0.5A
0.5A

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LM117H-MW8 Summary of contents

Page 1

... Output capacitors in the range of 1μF to 1000μF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients. © 2007 National Semiconductor Corporation the maximum input to output differential is not exceeded, i.e., avoid short-circuiting the output. ...

Page 2

Connection Diagrams TO-3 (K) Metal Can Package CASE IS OUTPUT Bottom View Steel Package NS Package Number K02A or K02C TO-263 (S) Surface-Mount Package Top View TO-263 (S) Surface-Mount Package Side View NS Package Number TS3B www.national.com CASE IS OUTPUT ...

Page 3

... LM317K STEEL LM317K STEEL P+ 1.5A LM117K/883 LM117K/883 1.5A LM317AT LM317AT P+ 1.5A LM317T LM317T P+ LM317S 1.5A LM317S P+ LM317SX LM317EMP 1.0A N01A LM317EMPX LM317AEMP 1.0A N07A LM317AEMPX 0.5A LM117H LM117H P+ 0.5A LM117H/883 LM117H/883 0.5A LM317AH LM317AH P+ 0.5A LM317H LM317H P+ 0.5A LM117E/883 LM117E/883 LM317MDT 0.5A LM317MDT LM317MDTX LM317AMDT 0.5A LM317AMDT LM317AMDTX 3 TO-252 (MDT) 906366 Front View NS Package Number TD03B ...

Page 4

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Storage Temperature Lead Temperature Metal Package (Soldering, 10 seconds) Plastic Package (Soldering, 4 seconds) ...

Page 5

... For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Note 2: Refer to RETS117H drawing for the LM117H, or the RETS117K for the LM117K military specifications. Note ...

Page 6

Typical Performance Characteristics Load Regulation Adjustment Current Temperature Stability www.national.com Output Capacitor = 0 μF unless otherwise noted Current Limit 906337 Dropout Voltage 906339 Minimum Operating Current 906341 6 906338 906340 906342 ...

Page 7

Ripple Rejection 906343 Ripple Rejection 906345 Line Transient Response 906347 Ripple Rejection Output Impedance Load Transient Response 7 906344 906346 906348 www.national.com ...

Page 8

Application Hints In operation, the LM117 develops a nominal 1.25V reference voltage between the output and adjustment terminal. REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I ...

Page 9

D1 protects against C1 D2 protects against C2 FIGURE 3. Regulator with Protection Diodes HEATSINK REQUIREMENTS The LM317 regulators have internal thermal shutdown to pro- ...

Page 10

FIGURE 5. θ vs Copper (2 ounce) Area for the (J−A) SOT-223 Package FIGURE 6. Maximum Power Dissipation vs T SOT-223 Package HEATSINKING THE TO-263 PACKAGE Figure 7 shows for the TO-263 the measured values of θ for different copper ...

Page 11

Layout Top Side (in 1 0.0123 2 0.066 3 0.3 4 0.53 5 0.76 6 1.0 7 0.066 8 0.066 9 0.066 10 0.066 11 0.066 12 0.066 13 0.175 14 0.284 15 0.392 16 0.5 Note: * Tab of ...

Page 12

FIGURE 10. Maximum Allowable Power Dissipation vs. Ambient Temperature for TO-252 FIGURE 11. Maximum Allowable Power Dissipation vs. 2oz Copper Area for TO-252 www.national.com 906363 906362 12 ...

Page 13

FIGURE 12. Top View of the Thermal Test Pattern in Actual Scale 13 906364 www.national.com ...

Page 14

FIGURE 13. Bottom View of the Thermal Test Pattern in Actual Scale Schematic Diagram www.national.com 906365 14 906308 ...

Page 15

Typical Applications 5V Logic Regulator with Electronic Shutdown* ≊ *Min. output 1.2V Slow Turn-On 15V Regulator Adjustable Regulator with Improved Ripple Rejection †Solid tantalum *Discharges C1 if output is shorted to ground High Stability 10V Regulator 906303 906309 906310 15 ...

Page 16

Regulator Full output current not available at high input-output voltages www.national.com High Current Adjustable Regulator 906313 16 906312 Power Follower 906314 ...

Page 17

Constant Voltage/Constant Current Regulator †Solid tantalum *Lights in constant current mode 1A Current Regulator 1.2V–20V Regulator with Minimum Program Current *Minimum load current 906316 906317 17 906315 ≊ High Gain Amplifier 906318 www.national.com ...

Page 18

A-254168-2 60 turns †Solid tantalum *Core—Arnold A-254168-2 60 turns www.national.com Low Cost 3A Switching Regulator 4A Switching Regulator with Overload Protection Precision Current Limiter 18 906319 906320 906321 ...

Page 19

LM117's higher current limit) — output only ¾ volt of drop occurs in R Adjusting Multiple On-Card Regulators with Single Control* *All outputs within ±100 mV †Minimum load—10 mA Tracking Preregulator Current Limited Voltage Regulator and ...

Page 20

Use of R allows low charging rates with fully charged battery. S www.national.com AC Voltage Regulator 12V Battery Charger 50mA Constant Current Battery Charger 20 906325 906326 906327 ...

Page 21

Current Limited 6V Charger *Sets peak current (0.6A for 1Ω) **The 1000μF is recommended to filter out input transients Adjustable 4A Regulator Digitally Selected Outputs 906329 *Sets maximum V OUT 21 906328 906302 www.national.com ...

Page 22

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted TO-3 Metal Can Package (K) NS Package Number K02A TO-3 Metal Can Package (K) Mil-Aero Product NS Package Number K02C 22 ...

Page 23

TO-39 Metal Can Package (H) NS Package Number H03A 3-Lead TO-220 (T) NS Package Number T03B 23 www.national.com ...

Page 24

TO-263 (S) NS Package Number TS3B Ceramic Leadless Chip Carrier (E) NS Package Number E20A 24 ...

Page 25

SOT-223 (EMP) NS Package Number MP04A 3-Lead D-Pack (MDT) NS Package Number TD03B 25 www.national.com ...

Page 26

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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