Text preview for : LM317L.pdf part of SGS-Thomson LM317L LM317L LM217L Low current 1.2V to 37V adjustable voltage regulator
Back to : LM317L.pdf | Home
LM217L LM317L
LOW CURRENT 1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR
. . . . . . . .
OUTPUT VOLTAGE RANGE : 1.2 TO 37V OUTPUT CURRENT IN EXCESS OF 100 mA LINE REGULATION TYP. 0.01% LOAD REGULATION TYP. 0.1% THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION OUTPUT TRANSISTOR SAFE AREA COMPENSATION FLOATING OPERATION FOR HIGH VOLTAGE APPLICATIONS
SO-8
DESCRIPTION The LM217L/LM317L are monolithic integrated circuit in SO-8 and TO-92 packages intended for use as positive adjustable voltage regulators. They are designed to supply until 100 mA of load current with an output voltage adjustable over a 1.2 to 37V range. The nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators. SCHEMATIC DIAGRAM
TO-92
April 1994
1/8
LM217L/LM317L
ABSOLUTE MAXIMUM RATING
Symbol Vi - Vo Pd Topr Tstg Parameter Input-Output Differential Voltage Power Dissipation Operating Junction Temperature Range Storage Temperature Range for LM217L for LM317L Value 40 Internally Limited -40 to 125 0 to 125 -55 to 150
o o o
Unit V C C C
PIN CONNECTION AND ORDERING NUMBER
SO-8 TO-92 BOTTOM VIEW
pin 1 = ADJUST pin 2 = IN pin 3 = OUT
Type LM217L LM317L
SO-8 LM217LD LM317LD
TO-92 LM217LZ LM317LZ
TEST CIRCUIT
2/8
LM217L/LM317L
ELECTRICAL CHARACTERISTICS FOR LM217L (Refer to the test circuits, -40 T j 125 oC V i - Vo = 5 V, Io = 40 mA, unless otherwise specified)
Symbol Vo Vo Parameter Line Regulation Load Regulation Test Conditions Vi - Vo = 3 to 40 V IL < 20 mA Vo 5V Io = 5 mA to 100 mA Vo 5V Io = 5 mA to 100 mA IADJ IADJ VREF Vo Vo Io(min) Io(max) eN SVR Adjustment Pin Current Adjustment Pin Current Reference Voltage Output Voltage Temperature Stability Minimum Load Current Maximum Output Current Output Noise Voltage (percentance of VO) Supply Voltage Rejection (*) Vi - Vo = 40 V Vi - Vo = 3 to 13 V Vi - Vo = 40 V B = 10Hz to 10KHz Tj = 25 oC Tj = 25 oC f = 120 Hz CADJ=0 CADJ=10µF 66 100 Vi - Vo = 3 to 40 V Io = 5 mA to 100 mA Pd < 625 mW Vi - Vo = 3 to 40 V Io = 5 mA to 100 mA Pd < 625 mW 1.2 Tj = 25 oC Tj = 25 oC Tj = 25 oC Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 0.7 3.5 200 50 0.003 65 80 5 Max. 0.02 0.05 15 50 0.3 1 100 5 1.3 Unit %/V %/V mV mV % % µA µA V % mA mA % dB dB
(*) CADJ is connected between Adjust pin and Ground.
ELECTRICAL CHARACTERISTICS FOR LM317L (Refer to the test circuits, 0 Tj 125 o C V i - Vo = 5 V, Io = 40 mA, unless otherwise specified)
Symbol Vo Vo Parameter Line Regulation Load Regulation Test Conditions Vi - Vo = 3 to 40 V IL < 20 mA Vo 5V Io = 5 mA to 100 mA Vo 5V Io = 5 mA to 100 mA IADJ IADJ VREF Vo Vo Io(min) Io(max) eN SVR Adjustment Pin Current Adjustment Pin Current Reference Voltage Output Voltage Temperature Stability Minimum Load Current Maximum Output Current Output Noise Voltage (percentance of VO) Supply Voltage Rejection (*) Vi - Vo = 40 V Vi - Vo = 3 to 13 V Vi - Vo = 40 V B = 10Hz to 10KHz Tj = 25 oC Tj = 25 oC f = 120 Hz CADJ=0 CADJ=10µF 66 100 Vi - Vo = 3 to 40 V Io = 5 mA to 100 mA Pd < 625 mW Vi - Vo = 3 to 40 V Io = 5 mA to 100 mA Pd < 625 mW 1.2 Tj = 25 oC Tj = 25 oC Tj = 25 oC Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 0.7 3.5 200 50 0.003 65 80 5 Max. 0.04 0.07 25 70 0.5 1.5 100 5 1.3 Unit %/V %/V mV mV % % µA µA V % mA mA % dB dB
(*) CADJ is connected between Adjust pin and Ground.
3/8
LM217L/LM317L
Current Limit Minimum Operating Current
APPLICATION INFORMATION The LM317L provides an internal reference voltage of 1.25V between the output and adjustments terminals. This is used to set a constant current flow across an external resistor divider (see fig. 4), giving an output voltage VO of: VO = VREF (1 + In order to optimise the load regulation, the current set resistor R1 (see fig. 4) should be tied as close as possible to the regulator, while the ground terminal of R2 should be near the ground of the load to provide remote ground sensing. Figure 4 : Basic Adjustable Regulator.
R2 ) + IADJ R2 R1
The device was designed to minimize the term IADJ (100µA max) and to maintain it very constant with line and load changes. Usually, the error term IADJR2 can be neglected. To obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is insufficient, the output voltage will rise. Since the LM317L is a floating regulator and "sees" only the input-to-output differential voltage, supplies of very high voltage with respect to ground can be regulated as long as the maximum input-to-output differential is not exceeded. Furthermore, programmable regulator are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator.
LM317L
4/8
LM217L/LM317L
Voltage Regulator with Protection Diodes.
LM317L
Slow Turn-on 15V Regulator.
Current Regulator.
LM317L
LM31 7L
Io =
Vref 1.25V + IADJ R1 R1
5V Electronic Shut-down Regulator.
Digitally Selected Outputs.
LM317L
LM 317L
(R2 sets maximum Vo )
5/8
LM217L/LM317L
SO8 MECHANICAL DATA
DIM. MIN. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 3.8 0.4 4.8 5.8 1.27 3.81 4.0 1.27 0.6 8° (max.) 0.14 0.015 5.0 6.2 0.65 0.35 0.19 0.25 0.1 mm TYP. MAX. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45° (typ.) 0.188 0.228 0.050 0.150 0.157 0.050 0.023 0.196 0.244 0.025 0.013 0.007 0.010 0.003 MIN. inch TYP. MAX. 0.068 0.009 0.064 0.033 0.018 0.010 0.019
P013M
6/8
LM217L/LM317L
TO-92 MECHANICAL DATA
mm DIM. MIN. TYP. MAX. MIN.
inch
TYP.
MAX.
A
4.58
5.33
0.180
0.210
B
4.45
5.2
0.175
0.204
C
3.2
4.2
0.126
0.165
D
12.7
0.500
E
1.27
0.050
F
0.4
0.51
0.016
0.020
G
0.35
0.14
A
D
E
E
B
C
G
G
F
7/8
LM217L/LM317L
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. © 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
8/8