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LM117JAN 3-Terminal Adjustable Regulator
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Also, it makes an especially simple adjustable
1FEATURES switching regulator, a programmable output regulator,
2• Specified 0.5A or 1.5A Output Current or by connecting a fixed resistor between the
• Adjustable Output Down to 1.2V adjustment pin and output, the LM117 can be used
as a precision current regulator. Supplies with
• Current Limit Constant with Temperature electronic shutdown can be achieved by clamping the
• 80 dB Ripple Rejection adjustment terminal to ground which programs the
• Output is Short-circuit Protected output to 1.2V where most loads draw little current.
For the negative complement, see LM137 series data
DESCRIPTION sheet.
The LM117 adjustable 3-terminal positive voltage
regulator is capable of supplying either 0.5A or 1.5A Connection Diagrams
over a 1.2V to 37V output range. It is exceptionally
easy to use and requires only two external resistors
to set the output voltage. Further, both line and load
regulation are better than standard fixed regulators.
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 CASE IS OUTPUT
remains fully functional even if the adjustment Figure 1. (TO-3)
terminal is disconnected. Metal Can Package
Normally, no capacitors are needed unless the device Bottom View
is situated more than 6 inches from the input filter Steel Package
capacitors in which case an input bypass is needed. Package Number K0002C
An optional output capacitor 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 standard 3-terminal
regulators.
Besides replacing fixed regulators, the LM117 is
useful in a wide variety of other applications. Since CASE IS OUTPUT
the regulator is “floating” and sees only the input-to-
output differential voltage, supplies of several Figure 2. (TO)
hundred volts can be regulated as long as the Metal Can Package
maximum input to output differential is not exceeded, Bottom View
i.e., avoid short-circuiting the output. Package Number NDT0003A
Table 1. LM117 Series Packages
Part Number Suffix Package Design Load Current
K TO-3 1.5A
NDT TO 0.5A
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)
Power Dissipation (2) Internally Limited
Input-Output Voltage Differential +40V, −0.3V
Storage Temperature −65°C ≤TA≤+150°C
Maximum Junction Temperature (TJmax) +150°C
Lead Temperature Metal Package 300°C
Thermal Resistance
θJA TO–3 Still Air 39°C/W
TO–3 500LF/Min Air flow 14°C/W
TO Still Air 186°C/W
TO 500LF/Min Air flow 64°C/W
θJC TO–3 1.9°C/W
TO Metal Can 21°C/W
ESD Tolerance (3) 3KV
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the
Electrical Characteristics. The ensured specifications apply only for the test conditions listed. Some performance characteristics may
degrade when the device is not operated under the listed test conditions.
(2) The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature),
θJA (package junction to ambient thermal resistance), and TA(ambient temperature). The maximum allowable power dissipation at any
temperature is PDmax = (TJmax - TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. "Although power
dissipation is internally limited, these specifications are applicable for power dissipations of 2W for the TO package and 20W for the TO-
3 package."
(3) Human body model, 100 pF discharged through a 1.5 kΩresistor.
Recommended Operating Conditions
Operating Temperature Range −55°C ≤TA≤+125°C
Input Voltage Range 4.25V to 41.25V
Quality Conformance Inspection
MIL-STD-883, Method 5005 - Group A
Subgroup Description Temp °C
1 Static tests at 25
2 Static tests at 125
3 Static tests at -55
4 Dynamic tests at 25
5 Dynamic tests at 125
6 Dynamic tests at -55
7 Functional tests at 25
8A Functional tests at 125
8B Functional tests at -55
9 Switching tests at 25
10 Switching tests at 125
11 Switching tests at -55
12 Settling time at 25
13 Settling time at 125
14 Settling time at -55
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LM117H JAN Electrical Characteristics DC Parameters Sub-
Symbol Parameter Conditions Notes Min Max Unit group
VOOutput Voltage VI= 4.25V, IL= -5mA 1.2 1.3 V 1, 2, 3
VI= 4.25V, IL= -500mA 1.2 1.3 V 1, 2, 3
VI= 41.25V, IL= -5mA 1.2 1.3 V 1, 2, 3
VI= 41.25V, IL= -50mA 1.2 1.3 V 1, 2, 3
VRLine Line Regulation 4.25V ≤VI≤41.25V, -9.0 9.0 mV 1
IL= -5mA -23 23 mV 2, 3
VRLoad Load Regulation VI= 6.25V, -12 12 mV 1, 2, 3
-500mA ≤IL≤-5mA
VI= 41.25V, -12 12 mV 1, 2, 3
-50mA ≤IL≤-5mA
θRThermal Regulation VI= 14.6V, IL= -500mA -12 12 mV 1
IAdj Adjust Pin Current VI= 4.25V, IL= -5mA -100 -15 µA 1, 2, 3
VI= 41.25V, IL= -5mA -100 -15 µA 1, 2, 3
ΔIAdj / Line Adjust Pin Current Change 4.25V ≤VI≤41.25V, -5.0 5.0 µA 1, 2, 3
IL= -5mA
ΔIAdj / Load Adjust Pin Current Change VI= 6.25V, -5.0 5.0 µA 1, 2, 3
-500mA ≤IL≤-5mA
IOS Output Short Circuit Current VI= 4.25V -1.8 -0.5 A 1, 2, 3
VI= 40V -0.5 -0.05 A 1, 2, 3
VORecov Output Voltage Recovery VI= 4.25V, RL= 2.5Ω, 1.2 1.3 V 1, 2, 3
CL= 20µF
VI= 40V, RL= 250Ω1.2 1.3 V 1, 2, 3
IQMinimum Load Current VI= 4.25V, -3.0 -0.5 mA 1, 2, 3
Forced VO= 1.4V
VI= 14.25V, -3.0 -0.5 mA 1, 2, 3
Forced VO= 1.4V
VI= 41.25V, -5.0 -1.0 mA 1, 2, 3
Forced VO= 1.4V
VStart Voltage Start-Up VI= 4.25V, RL= 2.5Ω, 1.2 1.3 V 1, 2, 3
CL=20µF, IL= -500mA
VOOutput Voltage VI= 6.25V, IL= -5mA (1) 1.2 1.3 V 2
(1) Tested @ TA= 125°C, correlated to TA= 150°C
LM117H JAN Electrical Characteristics AC Parameters Sub-
Symbol Parameter Conditions Notes Min Max Unit group
VNO Output Noise Voltage VI= 6.25V, IL= -50mA 120 µVRMS 7
ΔVO/ΔVILine Transient Response VI= 6.25V, ΔVI= 3V, 6 mV/V 7
IL= -10mA
ΔVO/ΔILLoad Transient Response VI= 6.25V, ΔIL= -200mA, 0.6 mV/mA 7
IL= -50mA
ΔVI/ΔVORipple Rejection VI= 6.25V, IL= -125mA 65 dB 4
eI= 1VRMS at ƒ = 2400Hz,
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LM117H JAN Electrical Characteristics DC Drift Parameters
Deltas performed on JAN S devices at Group B, Subgroup 5, only. Sub-
Symbol Parameter Conditions Notes Min Max Unit group
VOOutput Voltage VI= 4.25V, IL= -5mA -0.01 0.01 V 1
VI= 4.25V, IL= -500mA -0.01 0.01 V 1
VI= 41.25V, IL= -5mA -0.01 0.01 V 1
VI= 41.25V, IL= -50mA -0.01 0.01 V 1
VRLine Line Regulation 4.25V ≤VI≤41.25V, -4.0 4.0 mV 1
IL= -5mA
IAdj Adjust Pin Current VI= 4.25V, IL= -5mA -10 10 µA 1
VI= 41.25V, IL= -5mA -10 10 µA 1
LM117K JAN Electrical Characteristics DC Parameters Sub-
Symbol Parameter Conditions Notes Min Max Unit group
VOOutput Voltage VI= 4.25V, IL= -5mA 1.2 1.3 V 1, 2, 3
VI= 4.25V, IL= -1.5A 1.2 1.3 V 1, 2, 3
VI= 41.25V, IL= -5mA 1.2 1.3 V 1, 2, 3
VI= 41.25V, IL= -200mA 1.2 1.3 V 1, 2, 3
VRLine Line Regulation 4.25V ≤VI≤41.25V, -9.0 9.0 mV 1
IL= -5mA -23 23 mV 2, 3
VRLoad Load Regulation VI= 6.25V, -3.5 3.5 mV 1
-1.5A ≤IL≤-5mA -12 12 mV 2, 3
VI= 41.25V, -3.5 3.5 mV 1
-200mA ≤IL≤-5mA -12 12 mV 2, 3
θRThermal Regulation VI= 14.6V, IL= -1.5A -12 12 mV 1
IAdj Adjust Pin Current VI= 4.25V, IL= -5mA -100 -15 µA 1, 2, 3
VI= 41.25V, IL= -5mA -100 -15 µA 1, 2, 3
ΔIAdj / Line Adjust Pin Current Change 4.25V ≤VI≤41.25V, -5.0 5.0 µA 1, 2, 3
IL= -5mA
ΔIAdj / Load Adjust Pin Current Change VI= 6.25V, -5.0 5.0 µA 1, 2, 3
-1.5A ≤IL≤-5mA
IOS Output Short Circuit Current VI= 4.25V -3.5 -1.5 A 1, 2, 3
VI= 40V -1.0 -0.18 A 1, 2, 3
VORecov Output Voltage Recovery VI= 4.25V, RL= 0.833Ω, 1.2 1.3 V 1, 2, 3
CL= 20µF
VI= 40V, RL= 250Ω1.2 1.3 V 1, 2, 3
IQMinimum Load Current VI= 4.25V, -3.0 -0.2 mA 1, 2, 3
Forced VO= 1.4V
VI= 14.25V, -3.0 -0.2 mA 1, 2, 3
Forced VO= 1.4V
VI= 41.25V, -5.0 -0.2 mA 1, 2, 3
Forced VO= 1.4V
VStart Voltage Start-Up VI= 4.25V, RL= 0.833Ω, 1.2 1.3 V 1, 2, 3
CL=20µF, IL= -1.5A
VOOutput Voltage VI= 6.25V, IL= -5mA (1) 1.2 1.3 V 2
(1) Tested @ TA= 125°C, correlated to TA= 150°C
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LM117K JAN Electrical Characteristics AC Parameters Sub-
Symbol Parameter Conditions Notes Min Max Unit group
VNO Output Noise Voltage VI= 6.25V, IL= -100mA 120 µVRMS 7
ΔVO/ΔVILine Transient Response VI= 6.25V, ΔVI= 3V, (1) 18 mV 7
IL= -10mA
ΔVO/ΔILLoad Transient Response VI= 6.25V, ΔIL= -400mA, (2) 120 mV 7
IL= -100mA
ΔVI/ΔVORipple Rejection VI= 6.25V, IL= -500mA 65 dB 4
eI= 1VRMS at ƒ = 2400Hz,
(1) SS limit of 6mV/V is equivalent to 18mV
(2) SS limit of 0.3mV/V is equivalent to 120mV
LM117K JAN Electrical Characteristics DC Drift Parameters
Deltas performed on JAN S devices at Group B, Subgroup 5, only. Sub-
Symbol Parameter Conditions Notes Min Max Unit group
VOOutput Voltage VI= 4.25V, IL= -5mA -0.01 0.01 V 1
VI= 4.25V, IL= -1.5A -0.01 0.01 V 1
VI= 41.25V, IL= -5mA -0.01 0.01 V 1
VI= 41.25V, IL= -200mA -0.01 0.01 V 1
VRLine Line Regulation 4.25V ≤VI≤41.25V, -4.0 4.0 mV 1
IL= -5mA
IAdj Adjust Pin Current VI= 4.25V, IL= -5mA -10 10 µA 1
VI= 41.25V, IL= -5mA -10 10 µA 1
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Typical Performance Characteristics
Output Capacitor = 0μF unless otherwise noted
Load Regulation Current Limit
Figure 3. Figure 4.
Adjustment Current Dropout Voltage
Figure 5. Figure 6.
Temperature Stability Minimum Operating Current
Figure 7. Figure 8.
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Typical Performance Characteristics (continued)
Output Capacitor = 0μF unless otherwise noted
Ripple Rejection Ripple Rejection
Figure 9. Figure 10.
Ripple Rejection Output Impedance
Figure 11. Figure 12.
Line Transient Response Load Transient Response
Figure 13. Figure 14.
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APPLICATION HINTS
In operation, the LM117 develops a nominal 1.25V reference voltage, VREF, between the output and adjustment
terminal. The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a
constant current I1then flows through the output set resistor R2, giving an output voltage of
(1)
Figure 15.
Since the 100μA current from the adjustment terminal represents an error term, the LM117 was designed to
minimize IADJ and make it very constant with line and load changes. To do this, all quiescent operating current is
returned to the output establishing a minimum load current requirement. If there is insufficient load on the output,
the output will rise.
EXTERNAL CAPACITORS
An input bypass capacitor is recommended. A 0.1μF disc or 1μF solid tantalum on the input is suitable input
bypassing for almost all applications. The device is more sensitive to the absence of input bypassing when
adjustment or output capacitors are used but the above values will eliminate the possibility of problems.
The adjustment terminal can be bypassed to ground on the LM117 to improve ripple rejection. This bypass
capacitor prevents ripple from being amplified as the output voltage is increased. With a 10μF bypass capacitor
80dB ripple rejection is obtainable at any output level. Increases over 10μF do not appreciably improve the ripple
rejection at frequencies above 120Hz. If the bypass capacitor is used, it is sometimes necessary to include
protection diodes to prevent the capacitor from discharging through internal low current paths and damaging the
device.
In general, the best type of capacitors to use is solid tantalum. Solid tantalum capacitors have low impedance
even at high frequencies. Depending upon capacitor construction, it takes about 25μF in aluminum electrolytic to
equal 1μF solid tantalum at high frequencies. Ceramic capacitors are also good at high frequencies; but some
types have a large decrease in capacitance at frequencies around 0.5MHz. For this reason, 0.01μF disc may
seem to work better than a 0.1μF disc as a bypass.
Although the LM117 is stable with no output capacitors, like any feedback circuit, certain values of external
capacitance can cause excessive ringing. This occurs with values between 500 pF and 5000 pF. A 1μF solid
tantalum (or 25μF aluminum electrolytic) on the output swamps this effect and insures stability. Any increase of
the load capacitance larger than 10μF will merely improve the loop stability and output impedance.
LOAD REGULATION
The LM117 is capable of providing extremely good load regulation but a few precautions are needed to obtain
maximum performance. The current set resistor connected between the adjustment terminal and the output
terminal (usually 240Ω) should be tied directly to the output (case) of the regulator rather than near the load. This
eliminates line drops from appearing effectively in series with the reference and degrading regulation. For
example, a 15V regulator with 0.05Ωresistance between the regulator and load will have a load regulation due to
line resistance of 0.05Ω× IL. If the set resistor is connected near the load the effective line resistance will be
0.05Ω(1 + R2/R1) or in this case, 11.5 times worse.
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Figure 16 shows the effect of resistance between the regulator and 240Ωset resistor.
Figure 16. Regulator with Line Resistance in Output Lead
With the TO-3 package, it is easy to minimize the resistance from the case to the set resistor, by using two
separate leads to the case. However, with the TO package, care should be taken to minimize the wire length of
the output lead. The ground of R2 can be returned near the ground of the load to provide remote ground sensing
and improve load regulation.
PROTECTION DIODES
When external capacitors are used with any IC regulator it is sometimes necessary to add protection diodes to
prevent the capacitors from discharging through low current points into the regulator. Most 10μF capacitors have
low enough internal series resistance to deliver 20A spikes when shorted. Although the surge is short, there is
enough energy to damage parts of the IC.
When an output capacitor is connected to a regulator and the input is shorted, the output capacitor will discharge
into the output of the regulator. The discharge current depends on the value of the capacitor, the output voltage
of the regulator, and the rate of decrease of VIN. In the LM117, this discharge path is through a large junction that
is able to sustain 15A surge with no problem. This is not true of other types of positive regulators. For output
capacitors of 25μF or less, there is no need to use diodes.
The bypass capacitor on the adjustment terminal can discharge through a low current junction. Discharge occurs
when either the input or output is shorted. Internal to the LM117 is a 50Ωresistor which limits the peak discharge
current. No protection is needed for output voltages of 25V or less and 10μF capacitance. Figure 17 shows an
LM117 with protection diodes included for use with outputs greater than 25V and high values of output
capacitance.
D1 protects against C1
D2 protects against C2
Figure 17. Regulator with Protection Diodes
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When a value for θ(H−A) is found using the equation shown, a heatsink must be selected that has a value that is
less than or equal to this number.
θ(H−A) is specified numerically by the heatsink manufacturer in the catalog, or shown in a curve that plots
temperature rise vs power dissipation for the heatsink.
Typical Applications
*Min. output ≊1.2V
Figure 18. 5V Logic Regulator with Electronic Shutdown*
Figure 19. Slow Turn-On 15V Regulator
†Solid tantalum
*Discharges C1 if output is shorted to ground
Figure 20. Adjustable Regulator with Improved Ripple Rejection
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Figure 21. High Stability 10V Regulator
‡Optional—improves ripple rejection
†Solid tantalum
*Minimum load current = 30 mA
Figure 22. High Current Adjustable Regulator
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†Solid tantalum
*Lights in constant current mode
Figure 25. 5A Constant Voltage/Constant Current Regulator
Figure 26. 1A Current Regulator
*Minimum load current ≊4 mA
Figure 27. 1.2V–20V Regulator with Minimum Program Current
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†Solid tantalum
*Core—Arnold A-254168-2 60 turns
Figure 30. 4A Switching Regulator with Overload Protection
Figure 31. Precision Current Limiter
Figure 32. Tracking Preregulator
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(Compared to LM117's higher current limit)
—At 50 mA output only ¾ volt of drop occurs in R3and R4
Figure 33. Current Limited Voltage Regulator
*All outputs within ±100 mV
†Minimum load—10 mA
Figure 34. Adjusting Multiple On-Card Regulators with Single Control*
Figure 35. AC Voltage Regulator
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Use of RSallows low charging rates with fully charged battery.
Figure 36. 12V Battery Charger
Figure 37. 50mA Constant Current Battery Charger
Figure 38. Adjustable 4A Regulator
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Full output current not available at high input-output voltages
*Needed if device is more than 6 inches from filter capacitors.
†Optional—improves transient response. 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.
Figure 39. 1.2V–25V Adjustable Regulator
*Sets peak current (0.6A for 1Ω)
**The 1000μF is recommended to filter out input transients
Figure 40. Current Limited 6V Charger
*Sets maximum VOUT
Figure 41. Digitally Selected Outputs
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Revision History
Date Revision Section Originator Changes
Released
03/14/06 A New Release to corporate format L. Lytle 2 MDS data sheets were consolidated into one
corporate data sheet format. MJLM117–K Rev
0C1 and MJLM117–H Rev 1A1 will be
archived.
03/20/2013 A All Sections Changed layout of National Data Sheet to TI
format
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PACKAGE OPTION ADDENDUM
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Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
Op Temp (°C) Top-Side Markings
(4)
Samples
JL117BXA ACTIVE TO NDT 3 20 TBD Call TI Call TI -55 to 125 JL117BXA
JM38510/11703BXA Q
ACO
JM38510/11703BXA Q
>T
JM38510/11703BXA ACTIVE TO NDT 3 20 TBD Call TI Call TI -55 to 125 JL117BXA
JM38510/11703BXA Q
ACO
JM38510/11703BXA Q
>T
M38510/11703BXA ACTIVE TO NDT 3 20 TBD Call TI Call TI -55 to 125 JL117BXA
JM38510/11703BXA Q
ACO
JM38510/11703BXA Q
>T
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a
continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.
PACKAGE OPTION ADDENDUM
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Addendum-Page 2
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF LM117JAN, LM117JAN-SP :
•Military: LM117JAN
•Space: LM117JAN-SP
NOTE: Qualified Version Definitions:
•Military - QML certified for Military and Defense Applications
•Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application
MECHANICAL DATA
NDT0003A
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H03A (Rev D)
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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
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