Datasheet

ManualsBrandsON SEMICONDUCTOR ManualsVoltage Regulators500 A Adjustable Voltage Regulator, Positive

 Semiconductor Components Industries, LLC, 2004

August, 2004 − Rev. 12

1 Publication Order Number:

LM317M/D

LM317M

500 mA Adjustable Output,

Positive Voltage Regulator

The LM317M is an adjustable three−terminal positive voltage

regulator capable of supplying in excess of 500 mA over an output

voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally

easy to use and requires only two external resistors to set the output

voltage. Further, it employs internal current limiting, thermal

shutdown and safe area compensation, making it essentially blow−out

proof.

The LM317M serves a wide variety of applications including local,

on−card regulation. This device also makes an especially simple

adjustable switching regulator, a programmable output regulator, or by

connecting a fixed resistor between the adjustment and output, the

LM317M can be used as a precision current regulator.

Features

• Output Current in Excess of 500 mA

• Output Adjustable between 1.2 V and 37 V

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe−Area Compensation

• Floating Operation for High Voltage Applications

• Eliminates Stocking Many Fixed Voltages

• Pb−Free Packages are Available

Figure 1. Simplified Application

* = C

is required if regulator is located an appreciable distance from power supply filter.

** = C

is not needed for stability, however, it does improve transient response.

Since I

Adj

is controlled to less than 100 A, the error associated with this

term is negligible in most applications.

LM317M

out

240

Adjust

Adj

0.1F

1.0F

out

 1.25   V 



1 



 I

Adj

R

TO−220AB

T SUFFIX

CASE 221A

PIN ASSIGNMENT

Adjust

out

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 12 of this data sheet.

Heatsink Surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

SOT−223

ST SUFFIX

CASE 318E

DPAK

DT SUFFIX

CASE 369C

Heatsink surface

connected to Pin 2

http://onsemi.com

See general marking information in the device marking

section on page 13 of this data sheet.

DEVICE MARKING INFORMATION

http://onsemi.com

Summary of content (16 pages)

PAGE 1
LM317M 500 mA Adjustable Output, Positive Voltage Regulator The LM317M is an adjustable three−terminal positive voltage regulator capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow−out proof.
PAGE 2
LM317M MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.) Symbol Value Unit VI−VO 40 Vdc PD JA JC Internally Limited 70 5.0 °C/W °C/W PD JA JC Internally Limited 92 5.
PAGE 3
LM317M ELECTRICAL CHARACTERISTICS (VI − VO = 5.0 V; IO = 0.1 A, TJ = Tlow to Thigh (Note 2), unless otherwise noted.) LM317M / LM317MB Characteristics Figure Symbol Min Typ Max Unit − 0.01 0.04 %/V − − 5.0 0.1 25 0.5 mV % VO Line Regulation (Note 3) (TA = 25°C, 3.0 V ≤ VI − VO ≤ 40 V) 3 Regline Load Regulation (Note 3) TA = 25°C, 10 mA ≤ IO ≤ 0.5 A VO ≤ 5.0 V VO ≥ 5.0 V 4 Regload Adjustment Pin Current 5 IAdj − 50 100 A Adjustment Pin Current Change 2.
PAGE 4
LM317M ELECTRICAL CHARACTERISTICS (VI − VO = 5.0 V; IO = 0.1 A, TJ = Tlow to Thigh (Note 6), unless otherwise noted.) LM317MA / LM317MAB Characteristics Figure Symbol Min Typ Max Unit − 0.01 0.04 %/V − − 5.0 0.1 25 0.5 mV % VO Line Regulation (Note 7) (TA = 25°C, 3.0 V ≤ VI − VO ≤ 40 V) 3 Regline Load Regulation (Note 7) TA = 25°C, 10 mA ≤ IO ≤ 0.5 A VO ≤ 5.0 V VO ≥ 5.0 V 4 Regload Adjustment Pin Current 5 IAdj − 50 100 A Adjustment Pin Current Change 2.
PAGE 5
LM317M Vin 300 300 300 3.0k 300 70 6.8V 6.8V 350 18k 8.67k 500 130 400 5.1k 200k 6.3V 180 180 2.0k 6.0k 60 10 pF 10 pF 1.25 Vout 2.4k 12.8k Figure 2. Representative Schematic Diagram http://onsemi.
PAGE 6
LM317M VCC VOH − VOL VOL Line Regulation (%/V) = * x 100 VIH VIL Vin LM317M Adjust Cin 0.1 F VOH VOL Vout R1 240 1% RL + CO IAdj 1.0 F R2 1% * Pulse Testing Required: 1% Duty Cycle is suggested. Figure 3. Line Regulation and IAdj/Line Test Circuit Load Regulation (mV) = VO (min Load) −VO (max Load) Load Regulation (% VO) = Vin Vin LM317M Adjust Vout VO (min Load) − VO (max Load) VO (min Load) 0.
PAGE 7
LM317M Vin Vout LM317M IL Adjust 240 1% R1 VI IAdj Cin Vref RL + 0.1 F CO 1 F VO ISET R2 1% To Calculate R2: Vout = ISET R2 + 1.250 V Assume ISET = 5.25 mA *Pulse Testing Required: 1% Duty Cycle is suggested. Figure 5. Standard Test Circuit 24V Vin 14V f = 120 Hz Vout Adjust Cin Vout = 10 V LM317M 240 1% R1 D1 * 1N4002 0.1 F CO R2 1.65K 1% ** CAdj RL + 1.0 F + 10 F * D1 Discharges CAdj if Output is Shorted to Ground. **CAdj provides an AC ground to the adjust pin.
PAGE 8
LM317M 0.4 Vin = 45 V Vout = 5.0 V IL = 5.0 mA to 40 mA 0.2 RR, RIPPLE REJECTION (dB) ∆ V out , OUTPUT VOLTAGE CHANGE (%) 90 0 −0.2 Vin = 10 V Vout = 5.0 V IL = 5.0 mA to 100 mA −0.4 −0.6 −0.8 −1.0 80 Without CAdj = 10 F 70 50 −50 −25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) −50 150 −25 Figure 7. Load Regulation V in −Vout , INPUT−OUTPUT VOLTAGE DIFFERENTIAL (V) Iout , OUTPUT CURRENT (A) 0.80 0.60 TJ = 25°C 0.40 TJ = 125°C 150 2.5 IL = 500 mA 2.0 IL = 100 mA 1.5 1.0 0.
PAGE 9
LM317M 1.250 1.240 Vin = 4.2 V Vout = Vref IL = 5.0 mA 1.230 1.220 80 IAdj, ADJUSTMENT PIN CURRENT ( µA) Vref, REFERENCE VOLTAGE (V) 1.260 65 60 55 50 45 40 35 −50 −25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) Vin = 6.25 V Vout = Vref IL = 10 mA IL = 100 mA 70 150 −50 NOISE VOLTAGE ( µV) ∆ Vout , OUTPUT VOLTAGE CHANGE (%) 75 100 125 150 Bandwidth 100 Hz to 10 kHz 0 −0.2 −0.4 −0.6 8.0 6.0 −0.8 4.
PAGE 10
LM317M APPLICATIONS INFORMATION Basic Circuit Operation External Capacitors The LM317M is a three−terminal floating regulator. In operation, the LM317M develops and maintains a nominal 1.25 V reference (Vref) between its output and adjustment terminals. This reference voltage is converted to a programming current (IPROG) by R1 (see Figure 19), and this constant current flows through R2 to ground. The regulated output voltage is given by: A 0.1 F disc or 1.
PAGE 11
LM317M +25V Vout LM317M 1.25k Vin Adjust D1 D1 1N914 R2 500 * To provide current limiting of IO to the system ground, the source of the current limiting diode must be tied to a negative voltage below −7.25 V. 1N4002 Vin Vout LM317M Vin D2 1N914 Vout + 1.0 F 120 Adjust 1N5314 Vref R2 ≥ IDSS R1 = IO VO R1 MPS2222 TTL Control 720 1.0k VSS* Vref IOmax + IDSS Minimum Vout = 1.25 V VO < POV + 1.
PAGE 12
LM317M ORDERING INFORMATION Output Voltage Device Tolerance Operating Temperature Range Package Shipping† LM317MABDT DPAK 75 Units/Rail LM317MABDTRK DPAK 2500/Tape & Reel TO−220 50 Units/Rail DPAK 2500/Tape & Reel LM317MBDT DPAK 75 Units/Rail LM317MBDTRK DPAK 2500/Tape & Reel DPAK (Pb−Free) 2500/Tape & Reel SOT−223 4000/Tape & Reel LM317MBT TO−220 50 Units/Rail LM317MDT DPAK 75 Units/Rail DPAK (Pb−Free) 75 Units/Rail DPAK 2500/Tape & Reel DPAK (Pb−Free) 2500/Tape & Reel
PAGE 13
LM317M MARKING DIAGRAMS DPAK DT SUFFIX CASE 369C 317AB ALYWW 317MA ALYWW 317MB ALYWW 317M ALYWW SOT−223 ST SUFFIX CASE 318E TO−220 T SUFFIX CASE 221A LM 317MABT AWLYWW LM 317MBT AWLYWW LM 317MT AWLYWW A WL, L Y WW, W = Assembly Location = Wafer Lot = Year = Work Week http://onsemi.
PAGE 14
LM317M PACKAGE DIMENSIONS TO−220 T SUFFIX PLASTIC PACKAGE CASE 221A−09 ISSUE AA −T− B SEATING PLANE C F T S 4 DIM A B C D F G H J K L N Q R S T U V Z A Q 1 2 3 U H K Z L R V NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED. J G D N http://onsemi.com 14 INCHES MIN MAX 0.570 0.620 0.380 0.405 0.160 0.190 0.025 0.035 0.142 0.147 0.095 0.105 0.110 0.155 0.018 0.025 0.
PAGE 15
LM317M PACKAGE DIMENSIONS DPAK DT SUFFIX PLASTIC PACKAGE CASE 369C−01 ISSUE O −T− C B V NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. SEATING PLANE E R 4 Z A S 1 2 DIM A B C D E F G H J K L R S U V Z 3 U K F J L H D G 2 PL 0.13 (0.005) M T SOLDERING FOOTPRINT* 6.20 0.244 3.0 0.118 2.58 0.101 5.80 0.228 1.6 0.063 6.172 0.
PAGE 16
LM317M PACKAGE DIMENSIONS SOT−223 ST SUFFIX PLASTIC PACKAGE CASE 318E−04 ISSUE K A F NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. INCHES DIM MIN MAX A 0.249 0.263 B 0.130 0.145 C 0.060 0.068 D 0.024 0.035 F 0.115 0.126 G 0.087 0.094 H 0.0008 0.0040 J 0.009 0.014 K 0.060 0.078 L 0.033 0.041 M 0 10 S 0.264 0.287 4 S 1 2 3 B J D L M G K MILLIMETERS MIN MAX 6.30 6.70 3.30 3.70 1.50 1.75 0.60 0.89 2.90 3.20 2.20 2.40 0.020 0.100 0.24 0.35 1.50 2.