LM117H/883 - NATIONAL SEMICONDUCTOR

LM117QML

November 30, 2010

3-Terminal Adjustable Regulator

General Description

The LM117 series of adjustable 3-terminal positive voltage

regulators is capable of supplying either 0.5A or 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.

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

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 the negative complement, see LM137 series data sheet.

Features

■Available with Radiation Guarantee

—High Dose Rate 100 krad(Si)

—ELDRS Free 100 krad(Si)

■Guaranteed max. 0.3% load regulation (LM117)

■Guaranteed 0.5A or 1.5A output current

■Adjustable output down to 1.2V

■Current limit constant with temperature

■80 dB ripple rejection

■Output is short-circuit protected

Ordering Information

NS Part Number SMD Part Number NS Package Number Package Description

LM117E/883 E20A 20LD LCC

LM117H/883 H03A 3LD T0–39 Metal Can

LM117HRQMLV

(Note 12)

5962R9951703VXA

100 krad(Si) H03A 3LD T0–39 Metal Can

LM117HRLQMLV (Note 13)

ELDRS Free

5962R9951705VXA

100 krad(Si) H03A 3LD T0–39 Metal Can

LM117K/883 K02C 2LD T0–3 Metal Can

LM117KRQMLV

(Note 12)

5962R9951704VYA

100 krad(Si) K02C 2LD T0–3 Metal Can

LM117WGRQMLV

(Note 12)

5962R9951703VZA

100 krad(Si) WG16A 16LD Ceramic SOIC

LM117WGRLQMLV (Note 13)

ELDRS Free

5962R9951705VZA

100 krad(Si) WG16A 16LD Ceramic SOIC

LM117H MDE (Note 13)

ELDRS Free

5962R9951705V9A

100 krad(Si) (Note 1) Bare Die

LM117H MDR

(Note 12)

5962R9951703V9A

100 krad(Si) (Note 1) Bare Die

LM117H MD8 (Note 1) Bare Die

LM117KG MD8 (Note 1) Bare Die

Note 1: FOR ADDITIONAL DIE INFORMATION, PLEASE VISIT THE HI REL WEB SITE AT: www.national.com/analog/space/level_die

LM117QML 3-Terminal Adjustable Regulator

Connection Diagrams

(TO-3)

Metal Can Package

20143630

CASE IS OUTPUT

Bottom View

Steel Package

NS Package Number K02C

(TO-39)

Metal Can Package

20143631

CASE IS OUTPUT

Bottom View

NS Package Number H03A

Ceramic SOIC

Chip Carrier

20143667

Top View

NS Package Number WG16A

(Note 5)

Ceramic Leadless

Chip Carrier

20143634

Top View

NS Package Number E20A

LM117 Series Packages

Part Design

Number Package Load

Suffix Current

K TO-3 1.5A

H T0–39 0.5A

WG Ceramic SOIC 0.5A

E LCC 0.5A

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LM117QML

Schematic Diagram

20143608

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LM117QML

Absolute Maximum Ratings (Note 2)

Power Dissipation (Note 3) 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

T0–3 Still Air 39°C/W

T0–3 500LF/Min Air flow 14°C/W

T0–39 Still Air 186°C/W

T0–39 500LF/Min Air flow 64°C/W

Ceramic SOIC Still Air 115°C/W

Ceramic SOIC 500LF/Min Air flow 66°C/W

LCC Still Air 88°C/W

LCC 500LF/Min Air flow 62°C/W

θJC

T0–3 1.9°C/W

T0–39 Metal Can 21°C/W

Ceramic SOIC (Note 6) 3.4°C/W

LCC 12°C/W

Package Weight

T0–39 Metal Can 960mg

SOIC 365mg

ESD Tolerance (Note 4) 3KV

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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LM117QML

LM117H & WG Electrical Characteristics

DC Parameters

The following conditions apply, unless otherwise specified. VDiff = (VI − VO), IL = 8mA

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

IAdj Adjustment Pin Current

VDiff = 3V 100 µA 1

VDiff = 3.3V 100 µA 2, 3

VDiff = 40V 100 µA 1, 2, 3

IQMinimum Load Current

VDiff = 3V, VO = 1.7V 5.0 mA 1

VDiff = 3.3V, VO = 1.7V 5.0 mA 2, 3

VDiff = 40V, VO = 1.7V 5.0 mA 1, 2, 3

VRef Reference Voltage

VDiff = 3V 1.2 1.3 V 1

VDiff = 3.3V 1.2 1.3 V 2, 3

VDiff = 40V 1.2 1.3 V 1, 2, 3

VRLine Line Regulation

3V ≤ VDiff ≤ 40V,

VO = 1.2V

-8.9 8.9 mV 1

3.3V ≤ VDiff ≤ 40V,

VO = 1.2V

-22.2 22.2 mV 2, 3

VRLoad Load Regulation

VDiff= 3V,

IL = 10mA to 500mA

-15 15 mV 1

VDiff= 3.3V,

IL = 10mA to 500mA

-15 15 mV 2, 3

VDiff= 40V,

IL = 10mA to 150mA

-15 15 mV 1

VDiff= 40V,

IL = 10mA to 100mA

-15 15 mV 2, 3

ΔIAdj / Load Adjustment Current Change

VDiff = 3V,

IL = 10mA to 500mA

-5.0 5.0 µA 1

VDiff = 3.3V,

IL = 10mA to 500mA

-5.0 5.0 µA 2, 3

VDiff = 40V,

IL = 10mA to 150mA

-5.0 5.0 µA 1

VDiff = 40V,

IL = 10mA to 100mA

-5.0 5.0 µA 2, 3

ΔIAdj / Line Adjustment Current Change 3V ≤ VDiff ≤ 40V -5.0 5.0 µA 1

3.3V ≤ VDiff ≤ 40V -5.0 5.0 µA 2, 3

IOS Short Circuit Current VDiff = 10V 0.45 1.6 A 1

θRThermal Regulation TA = 25°C, t = 20mS, VDiff = 40V,

IL = 150mA

-6.0 6.0 mV 1

ICL Current Limit VDiff ≤ 15V (Note 7) 0.5 A 1, 2, 3

VDiff = 40V (Note 7) 0.15 A 1

AC Parameters

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

RR Ripple Rejection

VI = +6.25V, VO = VRef,

ƒ= 120Hz, eI = 1VRMS,

IL = 125mA

(Note 8) 66 dB 4, 5, 6

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LM117QML

LM117K Electrical Characteristics

DC Parameters

The following conditions apply, unless otherwise specified. VDiff = (VI − VO), IL = 10mA

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

IAdj Adjustment Pin Current

VDiff = 3V 100 µA 1

VDiff = 3.3V 100 µA 2, 3

VDiff = 40V 100 µA 1, 2, 3

IQMinimum Load Current

VDiff = 3V, VO = 1.7V 5.0 mA 1

VDiff = 3.3V, VO = 1.7V 5.0 mA 2, 3

VDiff = 40V, VO = 1.7V 5.0 mA 1, 2, 3

VRef Reference Voltage

VDiff = 3V 1.2 1.3 V 1

VDiff = 3.3V 1.2 1.3 V 2, 3

VDiff = 40V 1.2 1.3 V 1, 2, 3

VRLine Line Regulation

3V ≤ VDiff ≤ 40V,

VO = 1.2V

-8.9 8.9 mV 1

3.3V ≤ VDiff ≤ 40V,

VO = 1.2V

-22.2 22.2 mV 2, 3

VRLoad Load Regulation

VDiff= 3V,

IL = 10mA to 1.5A

-15 15 mV 1

VDiff= 3.3V,

IL = 10mA to 1.5A

-15 15 mV 2, 3

VDiff= 40V,

IL = 10mA to 300mA

-15 15 mV 1

VDiff= 40V,

IL = 10mA to 195mA

-15 15 mV 2, 3

ΔIAdj / Load Adjustment Current Change

VDiff = 3V,

IL = 10mA to 1.5A

-5.0 5.0 µA 1

VDiff = 3.3V,

IL = 10mA to 1.5A

-5.0 5.0 µA 2, 3

VDiff = 40V,

IL = 10mA to 300mA

-5.0 5.0 µA 1

VDiff = 40V,

IL = 10mA to 195mA

-5.0 5.0 µA 2, 3

ΔIAdj / Line Adjustment Current Change 3V ≤ VDiff ≤ 40V -5.0 5.0 µA 1

3.3V ≤ VDiff ≤ 40V -5.0 5.0 µA 2, 3

IOS Short Circuit Current VDiff = 10V 1.6 3.4 A 1

θRThermal Regulation TA = 25°C, t = 20mS,

VDiff = 40V, IL = 300mA

-10.5 10.5 mV 1

ICL Current Limit VDiff ≤ 15V (Note 7) 1.5 A 1, 2, 3

VDiff = 40V (Note 7) 0.3 A 1

AC Parameters

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

RR Ripple Rejection

VI = +6.25V, VO = VRef,

ƒ= 120Hz, eI = 1VRMS,

IL = 0.5A

(Note 8) 66 dB 4, 5, 6

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LM117QML

LM117E Electrical Characteristics

DC Parameters

The following conditions apply, unless otherwise specified. VDiff = (VI − VO), IL = 8mA, PD ≤ 1.5W

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

IAdj Adjustment Pin Current

VDiff = 3V 100 µA 1

VDiff = 3.3V 100 µA 2, 3

VDiff = 40V 100 µA 1, 2, 3

IQMinimum Load Current

VDiff = 3V, VO = 1.7V 5.0 mA 1

VDiff = 3.3V, VO = 1.7V 5.0 mA 2, 3

VDiff = 40V, VO = 1.7V 5.0 mA 1, 2, 3

VRef Reference Voltage

VDiff = 3V 1.2 1.3 V 1

VDiff = 3.3V 1.2 1.3 V 2, 3

VDiff = 40V 1.2 1.3 V 1, 2, 3

VRLine Line Regulation

3V ≤ VDiff ≤ 40V,

VO = 1.2V

-8.9 8.9 mV 1

3.3V ≤ VDiff ≤ 40V,

VO = 1.2V

-22.2 22.2 mV 2, 3

VRLoad Load Regulation

VDiff= 3V,

IL = 10mA to 100mA

-15 15 mV 1

VDiff= 3.3V,

IL = 10mA to 100mA

-15 15 mV 2, 3

VDiff= 40V,

IL = 10mA to 100mA

-15 15 mV 1,2

−25 25 mV 3

VDiff= 3V,

IL = 10mA to 500mA

-15 15 mV 1

VDiff= 3.3V,

IL = 10mA to 500mA

-15 15 mV 2, 3

ΔIAdj / Load Adjustment Current Change

VDiff = 3V,

IL = 10mA to 500mA

-5.0 5.0 µA 1

VDiff = 3.3V,

IL = 10mA to 500mA

-5.0 5.0 µA 2, 3

VDiff = 40V,

IL = 10mA to 100mA

-5.0 5.0 µA 1, 2, 3

ΔIAdj / Line Adjustment Current Change 3V ≤ VDiff ≤ 40V -5.0 5.0 µA 1

3.3V ≤ VDiff ≤ 40V -5.0 5.0 µA 2, 3

IOS Short Circuit Current VDiff = 10V 0.45 1.6 A 1

θRThermal Regulation TA = 25°C, t = 20mS,

VDiff = 40V, IL = 75mA

-6.0 6.0 mV 1

ICL Current Limit VDiff ≤ 15V (Note 7) 0.5 A 1, 2, 3

VDiff = 40V (Note 7) 0.15 A 1

AC Parameters

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

RR Ripple Rejection

VI = +6.25V, VO = VRef,

ƒ= 120Hz, eI = 1VRMS,

IL = 100mA, CAdj = 10µf

(Note 8) 66 dB 4, 5, 6

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LM117QML

LM117H & WG RH Electrical Characteristics

DC Parameters (Note 12, Note 13)

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

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,

IL = -5mA

-9.0 9.0 mV 1

-23 23 mV 2,3

VRLoad Load Regulation

VI = 6.25V,

-500mA ≤ IL ≤ -5mA

-12 12 mV 1, 2, 3

VI = 41.25V,

-50mA ≤ IL ≤ -5mA

-12 12 mV 1, 2, 3

VRTh Thermal 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,

IL = -5mA

-5.0 5.0 µA 1, 2, 3

ΔIAdj / Load Adjust Pin Current Change VI = 6.25V,

-500mA ≤ IL ≤ -5mA

-5.0 5.0 µA 1, 2, 3

IQMinimum Load Current

VI = 4.25V,

Forced VO = 1.4V

-3.0 -0.5 mA 1, 2, 3

VI = 14.25V,

Forced VO = 1.4V

-3.0 -0.5 mA 1, 2, 3

VI = 41.25V,

Forced VO = 1.4V

-5.0 -1.0 mA 1, 2, 3

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

VO (Recov) Output Voltage Recovery

VI = 4.25V, RL = 2.5Ω,

CL = 20µF

1.2 1.3 V 1, 2, 3

VI = 40V, RL = 250Ω 1.2 1.3 V 1, 2, 3

VOOutput Voltage VI = 6.25V, IL = -5mA (Note 9) 1.2 1.3 V 2

VStart Voltage Start-Up VI = 4.25V, RL = 2.5Ω,

CL = 20µF, IL = -500mA

1.2 1.3 V 1, 2, 3

AC Parameters (Note 12, Note 13)

Symbol Parameter Conditions Notes Min Max Unit Sub -

groups

VNO Output Noise Voltage VI = 6.25V, IL = -50mA 120 µVRMS 7

ΔVO / ΔVILine Transient Response VI = 6.25V, ΔVI = 3V,

IL = -10mA

6.0 mV/V 7

ΔVO / ΔILLoad Transient Response VI = 6.25V, ΔIL = -200mA,

IL = -50mA

0.6 mV/mA 7

ΔVI / ΔVORipple Rejection VI = 6.25V, IL = -125mA,

EI = 1VRMS at ƒ = 2400Hz

65 dB 4

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LM117QML

DC Drift Parameters

The following conditions apply, unless otherwise specified.

Deltas performed on QMLV devices at Group B, Subgroup 5, only.

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

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,

IL = -5mA

-4.0 4.0 mV 1

IAdj Adjust Pin Current VI = 4.25V, IL = -5mA -10 10 µA 1

VI = 41.25V, IL = -5mA -10 10 µA 1

VO (Recov) Output Voltage Recovery

VI = 4.25V, RL = 2.5Ω,

CL = 20µf

-0.01 0.01 V 1

VI = 40V, RL = 250Ω -0.01 0.01 V 1

AC/DC Post Radiation Limits @ +25°C (Note 12, Note 13)

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

VOOutput Voltage

VI = 4.25V, IL = -5mA 1.2 1.350 V 1

VI = 4.25V, IL = -500mA 1.2 1.350 V 1

VI = 41.25V, IL = -5mA 1.2 1.350 V 1

VI = 41.25V, IL = -50mA 1.2 1.350 V 1

VRLine Line Regulation 4.25V ≤ VI ≤ 41.25V,

IL = -5mA

-25 25 mV 1

ΔVI / ΔVORipple Rejection VI = 6.25V, IL = -125mA

EI = 1VRMS at f = 2400Hz

60 dB 4

VO (Recov) Output Voltage Recovery

VI = 4.25V, RL = 2.5Ω,

CL = 20µf

1.20 1.350 V 1

VI = 40V, RL = 250Ω 1.20 1.350 V 1

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LM117QML

LM117K RH Electrical Characteristics

DC Parameters (Note 12)

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

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,

IL = -5mA

-9.0 9.0 mV 1

-23 23 mV 2,3

VRLoad Load Regulation

VI = 6.25V,

-1.5A ≤ IL ≤ -5mA

-3.5 3.5 mV 1

-12 12 mV 2, 3

VI = 41.25V,

-200mA ≤ IL ≤ -5mA

-3.5 3.5 mV 1

-12 12 mV 2, 3

VRTh Thermal 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,

IL = -5mA

-5.0 5.0 µA 1, 2, 3

ΔIAdj / Load Adjust Pin Current Change VI = 6.25V,

-1.5A ≤ IL ≤ -5mA

-5.0 5.0 µA 1, 2, 3

IQMinimum Load Current

VI = 4.25V,

Forced VO = 1.4V

-3.0 -0.2 mA 1, 2, 3

VI = 14.25V,

Forced VO = 1.4V

-3.0 -0.2 mA 1, 2, 3

VI = 41.25V,

Forced VO = 1.4V

-5.0 -0.2 mA 1, 2, 3

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

VO (Recov) Output Voltage Recovery

VI = 4.25V, RL = 0.833Ω,

CL = 20µF

1.2 1.3 V 1, 2, 3

VI = 40V, RL = 250Ω 1.2 1.3 V 1, 2, 3

VOOutput Voltage VI = 6.25V, IL = -5mA (Note 9) 1.2 1.3 V 2

VStart Voltage Start-Up VI = 4.25V, RL = 0.833Ω,

CL = 20µF, IL = -1.5A

1.2 1.3 V 1, 2, 3

AC Parameters (Note 12)

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

VNO Output Noise Voltage VI = 6.25V, IL = -100mA 120 µVRMS 7

ΔVO / ΔVILine Transient Response VI = 6.25V, ΔVI = 3V,

IL = -10mA (Note 10) 18 mV 7

ΔVO / ΔILLoad Transient Response VI = 6.25V, ΔIL = -400mA,

IL = -100mA (Note 11) 120 mV 7

ΔVI / ΔVORipple Rejection VI = 6.25V, IL = -500mA,

EI = 1VRMS at ƒ = 2400Hz

65 dB 4

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LM117QML

DC Drift Parameters

The following conditions apply, unless otherwise specified.

Deltas performed on QMLV devices at Group B, Subgroup 5, only.

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

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,

IL = -5mA

-4.0 4.0 mV 1

IAdj Adjust Pin Current VI = 4.25V, IL = -5mA -10 10 µA 1

VI = 41.25V, IL = -5mA -10 10 µA 1

VO (Recov) Output Voltage Recovery

VI = 4.25V, RL = 0.833Ω,

CL = 20µS

-0.01 0.01 V 1

VI = 40V, RL = 250Ω -0.01 0.01 V 1

AC/DC Post Radiation Limits @ +25°C (Note 12)

Symbol Parameter Conditions Notes Min Max Unit Sub-

groups

VOOutput Voltage

VI = 4.25V, IL = -5mA 1.2 1.350 V 1

VI = 4.25V, IL = -1.5A 1.2 1.350 V 1

VI = 41.25V, IL = -5mA 1.2 1.350 V 1

VI = 41.25V, IL = -200mA 1.2 1.350 V 1

VRLine Line Regulation 4.25V ≤ VI ≤ 41.25V,

IL = -5mA

-25 25 mV 1

VRLoad Load Regulation

VI = 6.25V,

-1.5A ≤ IL ≤ -5mA

-7.0 7.0 mV 1

VI = 41.25V,

-200mA ≤ IL ≤ -5mA

-7.0 7.0 mV 1

ΔVI / ΔVORipple Rejection VI = 6.25V, IL = -500mA

EI = 1VRMS at f = 2400Hz

60 dB 4

VO (Recov) Output Voltage Recovery

VI = 4.25V, RL = 0.833Ω,

CL = 20µS

1.20 1.350 V 1

VI = 40V, RL = 250Ω 1.20 1.350 V 1

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LM117QML

Note 2: 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 guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed

specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test

conditions.

Note 3: 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 TO39, LCC, and ceramic SOIC packages, and 20W for the TO3 package."

Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.

Note 5: For the Ceramic SOIC device to function properly, the “Output” and “Output/Sense” pins must be connected on the users printed circuit board.

Note 6: The package material for these devices allows much improved heat transfer over our standard ceramic packages. In order to take full advantage of this

improved heat transfer, heat sinking must be provided between the package base (directly beneath the die), and either metal traces on, or thermal vias through,

the printed circuit board. Without this additional heat sinking, device power dissipation must be calculated using θJA, rather than θJC, thermal resistance. It must

not be assumed that the device leads will provide substantial heat transfer out the package, since the thermal resistance of the leadframe material is very poor,

relative to the material of the package base. The stated θJC thermal resistance is for the package material only, and does not account for the additional thermal

resistance between the package base and the printed circuit board. The user must determine the value of the additional thermal resistance and must combine

this with the stated value for the package, to calculate the total allowed power dissipation for the device.

Note 7: Guaranteed parameter, not tested.

Note 8: Tested @ 25°C; guaranteed, but not tested @ 125°C & −55°C

Note 9: Tested @ TA = 125°C, correlated to TA = 150°C

Note 10: SMD limit of 6mV/V is equivalent to 18mV

Note 11: SMD limit of 0.3mV/V is equivalent to 120mV

Note 12: Pre and post irradiation limits are identical to those listed under AC and DC electrical characteristics except as listed in the “Post Radiation Limits” table.

These parts may be dose rate sensitive in a space environment and demonstrate enhanced low dose rate effect. Radiation end point limits for the noted parameters

are guaranteed only for the conditions as specified in Mil-Std-883, Method 1019.5, Condition A.

Note 13: Low dose rate testing has been performed on a wafer-by-wafer basis, per test method 1019 condition D of MIL-STD-883, with no enhanced low dose

rate sensitivity (ELDRS) effect.

Typical Performance Characteristics Output Capacitor = 0μF unless otherwise noted

Load Regulation

20143637

Current Limit

20143638

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LM117QML

Adjustment Current

20143639

Dropout Voltage

20143640

Temperature Stability

20143641

Minimum Operating Current

20143642

Ripple Rejection

20143643

Ripple Rejection

20143644

13 www.national.com

LM117QML

Ripple Rejection

20143645

Output Impedance

20143646

Line Transient Response

20143647

Load Transient Response

20143648

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LM117QML

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 I1

then flows through the output set resistor R2, giving an output

voltage of

20143605

FIGURE 1.

Since the 100μA current from the adjustment terminal repre-

sents 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 out-

put 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 ca-

pacitors 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 pre-

vents ripple from being amplified as the output voltage is

increased. With a 10μF bypass capacitor 80dB ripple rejec-

tion 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 capac-

itor 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 tanta-

lum 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 be-

tween 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 reg-

ulation 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 ap-

pearing effectively in series with the reference and degrading

regulation. For example, a 15V regulator with 0.05Ω resis-

tance between the regulator and load will have a load regu-

lation 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.

Figure 2 shows the effect of resistance between the regulator

and 240Ω set resistor.

20143606

FIGURE 2. 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-39 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. Al-

though 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 dis-

charge through a low current junction. Discharge occurs when

either the input or output is shorted. Internal to the LM117 is

a 50Ω resistor which limits the peak discharge current. No

protection is needed for output voltages of 25V or less and

15 www.national.com

LM117QML

10μF capacitance. Figure 3 shows an LM117 with protection

diodes included for use with outputs greater than 25V and

high values of output capacitance.

20143607

D1 protects against C1

D2 protects against C2

FIGURE 3. Regulator with Protection Diodes

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

5V Logic Regulator with Electronic Shutdown*

20143603

*Min. output ≊ 1.2V

Slow Turn-On 15V Regulator

20143609

Adjustable Regulator with Improved Ripple Rejection

20143610

†Solid tantalum

*Discharges C1 if output is shorted to ground

www.national.com 16

LM117QML

High Stability 10V Regulator

20143611

High Current Adjustable Regulator

20143612

‡Optional—improves ripple rejection

†Solid tantalum

*Minimum load current = 30 mA

17 www.national.com

LM117QML

0 to 30V Regulator

20143613

Full output current not available at high input-output voltages

Power Follower

20143614

5A Constant Voltage/Constant Current Regulator

20143615

†Solid tantalum

*Lights in constant current mode

www.national.com 18

LM117QML

1A Current Regulator

20143616

1.2V–20V Regulator with Minimum Program Current

20143617

*Minimum load current ≊ 4 mA

High Gain Amplifier

20143618

19 www.national.com

LM117QML

Low Cost 3A Switching Regulator

20143619

†Solid tantalum

*Core—Arnold A-254168-2 60 turns

4A Switching Regulator with Overload Protection

20143620

†Solid tantalum

*Core—Arnold A-254168-2 60 turns

Precision Current Limiter

20143621

www.national.com 20

LM117QML

Tracking Preregulator

20143622

Current Limited Voltage Regulator

20143623

(Compared to LM117's higher current limit)

—At 50 mA output only ¾ volt of drop occurs in R3 and R4

Adjusting Multiple On-Card Regulators with Single Control*

20143624

*All outputs within ±100 mV

†Minimum load—10 mA

21 www.national.com

LM117QML

AC Voltage Regulator

20143625

12V Battery Charger

20143626

Use of RS allows low charging rates with fully charged battery.

50mA Constant Current Battery Charger

20143627

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LM117QML

Adjustable 4A Regulator

20143628

1.2V–25V Adjustable Regulator

20143601

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.

Current Limited 6V Charger

20143629

*Sets peak current (0.6A for 1Ω)

**The 1000μF is recommended to filter out input transients

Digitally Selected Outputs

20143602

*Sets maximum VOUT

23 www.national.com

LM117QML

Revision History

Date Released Revision Section Changes

03/17/06 A New Release to corporate format 5 MDS data sheets were consolidated into one

corporate data sheet format. Clarified ΔIAdj/ Line

versus ΔIAdj/ Load by separating the parameters in

all of the tables. MNLM117–K Rev 1C1,

MNLM117–X Rev 0A0, MNLM117–E Rev 0B1,

MRLM117–X-RH Rev 2A0, MRLM117–K-RH Rev

3A0 will be archived.

06/29/06 B Features, Ordering Information Table, Rad

Hard Electrical Section for H and WG

packages and Notes

Deleted NSID LM117WGRQML, no longer

available. Added Available with Radiation

Guarantee, Low Dose NSID's to table

5962R9951705VXA LM117HRLQMLV,

5962R9951705VZA LM117WGRLQMLV, and

reference to Note 11 and 12. Note 12 to Rad Hard

Electrical Heading for H and WG packages. Note

12 to Notes. Archive Revision A.

11/30/2010 C Features, Ordering Table, Absolute

Ratings, LM117H, WG and K RH Drift

Electrical Table

Added radiation info., Update with current device

information and format, T0–39 Pkg weight, Vo

(Recov). Revision B will be Archived.

www.national.com 24

LM117QML

Physical Dimensions inches (millimeters) unless otherwise noted

(TO-39) Metal Can Package

NS Package Number H03A

TO-3 Metal Can Package (K)

NS Package Number K02C

25 www.national.com

LM117QML

Ceramic Leadless Chip Carrier

NS Package Number E20A

Ceramic SOIC

NS Package Number WG16A

www.national.com 26

LM117QML

Notes

27 www.national.com

LM117QML

Notes

LM117QML 3-Terminal Adjustable Regulator

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