Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsVoltage RegulatorsSMD Fixed Voltage Regulator, 0.1 A, Positive

LM317L-N

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SNVS775J –MARCH 2000–REVISED MARCH 2013

LM317L-N 3-Terminal Adjustable Regulator

Check for Samples: LM317L-N

In addition to higher performance than fixed

FEATURES

regulators, the LM317L-N offers full overload

• Adjustable Output Down to 1.2V

protection. Included on the chip are current limit,

• 100mA Output Current

thermal overload protection and safe area protection.

All overload protection circuitry remains fully

• Line Regulation Typically 0.01%V

functional even if the adjustment terminal is

• Load Regulation Typically 0.1%

disconnected.

• Current Limit Constant with Temperature

Normally, no capacitors are needed unless the device

• Eliminates the Need to Stock Many Voltages

is situated more than 6 inches from the input filter

• Standard 3-lead Transistor Package

capacitors in which case an input bypass is needed.

An optional output capacitor can be added to improve

• 80dB Ripple Rejection

transient response. The adjustment terminal can be

• Available in TO-92, SOIC-8, or 6-DSBGA

bypassed to achieve very high ripple rejection ratios

Package

which are difficult to achieve with standard 3-terminal

• Output is Short Circuit Protected

regulators.

• See AN-1112 (SNVA009) for DSBGA

Besides replacing fixed regulators, the LM317L-N is

Considerations

useful in a wide variety of other applications. Since

the regulator is “floating” and sees only the input-to-

DESCRIPTION

output differential voltage, supplies of several

hundred volts can be regulated as long as the

The LM317L-N is an adjustable 3-terminal positive

maximum input-to-output differential is not exceeded.

voltage regulator capable of supplying 100mA over a

1.2V to 37V output range. It is exceptionally easy to

Also, it makes an especially simple adjustable

use and requires only two external resistors to set the

switching regulator, a programmable output regulator,

output voltage. Further, both line and load regulation

or by connecting a fixed resistor between the

are better than standard fixed regulators. Also, the

adjustment and output, the LM317L-N can be used

LM317L-N is available packaged in a standard TO-92

as a precision current regulator. Supplies with

transistor package which is easy to use.

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.

The LM317L-N is available in a standard TO-92

transistor package, the SOIC-8 package, and 6-

DSBGA package. The LM317L-N is rated for

operation over a −40°C to 125°C range.

Connection Diagram

Figure 1. TO-92 Plastic package Figure 2. 8-Pin SOIC - Top View

Please 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.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 LM317L-N 3-Terminal Adjustable Regulator Check for Samples: LM317L-N FEATURES 1 • • • • • • • • • 2 • • Adjustable Output Down to 1.2V 100mA Output Current Line Regulation Typically 0.01%V Load Regulation Typically 0.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com *NC = Not Internally connected. Figure 3. 6-DSBGA - Top View (Bump Side Down) Figure 4. DSBGA Laser Mark 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.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Electrical Characteristics (1) Parameter Conditions Typ Max Units 0.01 0.04 %/V 0.1 0.5 % TJ = 25°C, 10ms Pulse 0.04 0.2 %/W 50 100 μA Adjustment Pin Current 5mA ≤ IL ≤ 100mA 0.2 5 μA Change 3V ≤ (VIN − VOUT) ≤ 40V, P ≤ 625mW Reference Voltage 3V ≤ (VIN − VOUT) ≤ 40V (3) 5mA ≤ IOUT ≤ 100mA, P ≤ 625mW 1.25 1.30 V Line Regulation 3V ≤ (VIN − VOUT) ≤ 40V, IL ≤ 20mA (2) 0.02 0.07 %/V 0.3 1.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Output capacitor = 0μF unless otherwise noted.) 4 Load Regulation Current Limit Figure 5. Figure 6. Adjustment Current Dropout Voltage Figure 7. Figure 8. Reference Voltage Temperature Stability Minimum Operating Current Figure 9. Figure 10.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Typical Performance Characteristics (continued) (Output capacitor = 0μF unless otherwise noted.) Ripple Rejection Ripple Rejection Figure 11. Figure 12. Output Impedance Line Transient Response Figure 13. Figure 14. Load Transient Response Thermal Regulation Figure 15. Figure 16.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com APPLICATION HINTS In operation, the LM317L-N develops a nominal 1.25V reference voltage, VREF, between the output and adjustment terminal.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Figure 17. Regulator with Line Resistance in Output Lead THERMAL REGULATION When power is dissipated in an IC, a temperature gradient occurs across the IC chip affecting the individual IC circuit components. With an IC regulator, this gradient can be especially severe since power dissipation is large.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com D1 protects against C1 D2 protects against C2 Figure 18. Regulator with Protection Diodes LM317L-N DSBGA Light Sensitivity Exposing the LM317L-N DSBGA package to bright sunlight may cause the VREF to drop. In a normal office environment of fluorescent lighting the output is not affected. The LM317 DSBGA does not sustain permanent damage from light exposure. Removing the light source will cause LM317L-N's VREF to recover to the proper value.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Typical Applications *Sets maximum VOUT Figure 19. Digitally Selected Outputs Figure 20. High Gain Amplifier 12 ≤ R1 ≤ 240 Figure 21. Adjustable Current Limiter Figure 22.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com Figure 23. Slow Turn-On 15V Regulator †Solid tantalum *Discharges C1 if output is shorted to ground Figure 24. Adjustable Regulator with Improved Ripple Rejection Figure 25.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Short circuit current is approximately 600 mV/R3, or 60mA (compared to LM317L-NZ's 200mA current limit). At 25mA output only 3/4V of drop occurs in R3 and R4. Figure 26. Adjustable Regulator with Current Limiter Full output current not available at high input-output voltages Figure 27. 0V–30V Regulator Figure 28.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com Figure 29. Power Follower *All outputs within ± 100mV †Minimum load −5mA Figure 30. Adjusting Multiple On-Card Regulators with Single Control* Figure 31. 100mA Current Regulator *Minimum load current ≈ 2 mA Figure 32. 1.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Figure 33. 50mA Constant Current Battery Charger for Nickel-Cadmium Batteries *Minimum output ≈ 1.2V Figure 34. 5V Logic Regulator with Electronic Shutdown* *Sets peak current, IPEAK = 0.6V/R1 **1000μF is recommended to filter out any input transients. Figure 35.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com Figure 36. Short Circuit Protected 80V Supply Q1, Q2: NSD134 or similar C1, C2: 1μF, 200V mylar** *Heat sink Figure 37.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Q1, Q2: NSD134 or similar C1, C2: 1μF, 200V mylar** *Heat sink **Mylar is a registered trademark of DuPont Co. Figure 38. Precision High Voltage Regulator A1 = LM301A, LM307, or LF13741 only R1, R2 = matched resistors with good TC tracking Figure 39.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com Trim Procedure: — If VOUT is 23.08V or higher, cut out R3 (if lower, don't cut it out). — Then if VOUT is 22.47V or higher, cut out R4 (if lower, don't). — Then if VOUT is 22.16V or higher, cut out R5 (if lower, don't). This will trim the output to well within ±1% of 22.00 VDC, without any of the expense or uncertainty of a trim pot (see LB-46). Of course, this technique can be used at any output voltage level. Figure 40.
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LM317L-N www.ti.com SNVS775J – MARCH 2000 – REVISED MARCH 2013 Full output current not available at high input-output voltages †Optional—improves transient response *Needed if device is more than 6 inches from filter capacitors Figure 42. 1.2V-25 Adjustable Regulator Figure 43. Fully Protected (Bulletproof) Lamp Driver Output rate—4 flashes per second at 10% duty cycle Figure 44.
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LM317L-N SNVS775J – MARCH 2000 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision I (March 2013) to Revision J • 18 Page Changed layout of National Data Sheet to TI format ............................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 21-May-2013 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) LM317LITP/NOPB DSBGA YPB 6 250 178.0 LM317LITPX/NOPB DSBGA YPB 6 3000 LM317LMX SOIC D 8 2500 LM317LMX/NOPB SOIC D 8 2500 B0 (mm) K0 (mm) P1 (mm) 8.4 1.09 1.75 0.66 4.0 178.0 8.4 1.09 1.75 0.66 330.0 12.4 6.5 5.4 2.0 330.0 12.4 6.5 5.4 2.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM317LITP/NOPB DSBGA YPB 6 250 210.0 185.0 35.0 LM317LITPX/NOPB DSBGA YPB 6 3000 210.0 185.0 35.0 LM317LMX SOIC D 8 2500 367.0 367.0 35.0 LM317LMX/NOPB SOIC D 8 2500 367.0 367.0 35.
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MECHANICAL DATA YPB0006 D 0.5±0.045 E TPA06XXX (Rev B) D: Max = 1.68 mm, Min = 1.619 mm E: Max = 1.019 mm, Min =0.958 mm 4215099/A NOTES: A. All linear dimensions are in millimeters. Dimensioning and tolerancing per ASME Y14.5M-1994. B. This drawing is subject to change without notice. www.ti.
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