LM317AEMP National Semiconductor, LM317AEMP Datasheet

IC, ADJ LINEAR REG 1.2V TO 37V SOT-223-3

LM317AEMP

Manufacturer Part Number
LM317AEMP
Description
IC, ADJ LINEAR REG 1.2V TO 37V SOT-223-3
Manufacturer
National Semiconductor
Datasheet

Specifications of LM317AEMP

Primary Input Voltage
40V
Output Voltage Adjustable Range
1.2V To 37V
No. Of Outputs
1
No. Of Pins
3
Output Current
1A
Operating Temperature Range
-40°C To +125°C
Termination Type
SMD
Voltage Regulator Type
Linear
Topology
Standard
Regulator Output Type
Adjustable
Polarity Type
Positive
Number Of Outputs
Single
Input Voltage (min)
4.2V
Input Voltage (max)
40V
Output Voltage
1.2 to 37V
Package Type
SOT-223
Load Regulation
0.5%
Line Regulation
0.01%/V
Output Voltage Accuracy
±1%
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Pin Count
3 +Tab
Mounting
Surface Mount
Filter Terminals
SMD
Rohs Compliant
No
Current Rating
1A
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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© 2011 National Semiconductor Corporation
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
LM117/LM317A/LM317
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
LM317A, LM317
Product Enhancement tested
LM117, LM317
LM117/LM317A/LM317 Package Options
Number
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
February 25, 2011
906354
www.national.com
Current
Output
1.5A
1.5A
1.5A
1.0A
0.5A
0.5A
0.5A

LM317AEMP 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. © 2011 National Semiconductor Corporation LM117/LM317A/LM317 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

... 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 ...

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) ESD Tolerance (Note 5) LM117 Electrical Characteristics Specifications with standard type face are for T Range ...

Page 5

LM317A and LM317 Electrical Characteristics Specifications with standard type face are for T Range. Unless otherwise specified, V Parameter Reference Voltage Line Regulation 3V Load Regulation 10 mA Thermal Regulation 20 ms Pulse Adjustment Pin Current 10 ...

Page 6

Typical Performance Characteristics Load Regulation Adjustment Current OUT IN OUT www.national.com Output Capacitor = 0 μF unless otherwise noted 906337 906339 = V REF 906367 6 Current Limit 906338 Dropout Voltage 906340 ...

Page 7

Temperature Stability 906341 Ripple Rejection 906343 Ripple Rejection 906345 Minimum Operating Current Ripple Rejection Output Impedance 7 906342 906344 906346 www.national.com ...

Page 8

Line Transient Response www.national.com Load Transient Response 906347 8 906348 ...

Page 9

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 10

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 11

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 shows for the TO-263 the measured values of θ Figure 7 for different copper ...

Page 12

Layout Top Side ( Note: * Tab of device attached to topside of copper. www.national.com TABLE 1. θ Different Heatsink Area JA Copper Area ...

Page 13

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 906363 906362 13 www.national.com ...

Page 14

FIGURE 12. Top View of the Thermal Test Pattern in Actual Scale www.national.com 906364 14 ...

Page 15

FIGURE 13. Bottom View of the Thermal Test Pattern in Actual Scale Schematic Diagram 906365 15 906308 www.national.com ...

Page 16

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

Page 17

Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 906313 17 906312 Power Follower 906314 www.national.com ...

Page 18

Current Regulator 1.2V–20V Regulator with Minimum Program Current www.national.com 5A Constant Voltage/Constant Current Regulator *Minimum load current 906316 906317 18 906315 ≊ High Gain Amplifier 906318 ...

Page 19

A-254168-2 60 turns 4A Switching Regulator with Overload Protection †Solid tantalum *Core—Arnold A-254168-2 60 turns Low Cost 3A Switching Regulator Precision Current Limiter 906321 19 906319 906320 www.national.com ...

Page 20

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 www.national.com Tracking Preregulator Current Limited Voltage Regulator ...

Page 21

Use of R allows low charging rates with fully charged battery Voltage Regulator 12V Battery Charger 50mA Constant Current Battery Charger 906327 21 906325 906326 www.national.com ...

Page 22

Current Limited 6V Charger *Sets peak current (0.6A for 1Ω) **The 1000μF is recommended to filter out input transients www.national.com Adjustable 4A Regulator Digitally Selected Outputs 906329 *Sets maximum V OUT 22 906328 906302 ...

Page 23

Physical Dimensions 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 23 www.national.com ...

Page 24

TO-39 Metal Can Package (H) NS Package Number H03A 3-Lead TO-220 (T) NS Package Number T03B 24 ...

Page 25

TO-263 (S) NS Package Number TS3B Ceramic Leadless Chip Carrier (E) NS Package Number E20A 25 www.national.com ...

Page 26

SOT-223 (EMP) NS Package Number MP04A 3-Lead D-Pack (MDT) NS Package Number TD03B 26 ...

Page 27

Notes 27 www.national.com ...

Page 28

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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