LM317LM/TR

LM317L 3-Terminal Adjustable Regulator General Description The LM317L is an adjustable 3-terminal positive voltage regulator capable of supplying 100mA 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. Also, the LM317L is available packaged in a standard TO-92 transistor package which is easy to use. In addition to higher performance than fixed regulators, the LM317L offers full overload protection. 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 terminal is disconnected. Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. 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 LM317L is useful in a wide variety of other applications. Since the regulator is “floating” 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. Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317L 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. The LM317L is available in a standard TO-92 transistor package, the SO-8 package, and 6-Bump micro SMD package. The LM317L is rated for operation over a −25˚C to 125˚C range. Features Adjustable output down to 1.2V Guaranteed 100mA output current Line regulation typically 0.01%V Load regulation typically 0.1% Current limit constant with temperature Eliminates the need to stock many voltages Standard 3-lead transistor package 80dB ripple rejection Available in TO-92, SO-8 package n Output is short circuit protected n See AN-1112 for micro SMD considerations n n n n n n n n n Connection Diagrams TO-92 Plastic package 8-Pin SOIC Top View http://www.hgsemi.com.cn 1 2019 SEP LM317L Absolute Maximum Ratings (Note 1) Storage Temperature If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Lead Temperature (Soldering, 4 seconds) Power Dissipation 40V Operating Junction Temperature Range −40˚C to +125˚C 260˚C Output is Short Circuit Protected Internally Limited Input-Output Voltage Differential −55˚C to +150˚C ESD Susceptibility Human Body Model (Note 5) 2kV Electrical Characteristics (Note 2) Parameter Line Regulation Conditions Min TJ = 25˚C, 3V ≤ (VIN − VOUT) ≤ 40V, IL ≤ 20mA (Note 3) Typ Max Units 0.01 0.04 %/V Load Regulation TJ = 25˚C, 5mA ≤ IOUT ≤ IMAX, (Note 3) 0.1 0.5 % Thermal Regulation TJ = 25˚C, 10ms Pulse 0.04 0.2 %/W 50 100 µA 0.2 5 µA 1.25 1.30 V %/V Adjustment Pin Current Adjustment Pin Current 5mA ≤ IL ≤ 100mA Change 3V ≤ (VIN − VOUT) ≤ 40V, P ≤ 625mW Reference Voltage 3V ≤ (VIN − VOUT) ≤ 40V, (Note 4) 1.20 5mA ≤ IOUT ≤ 100mA, P ≤ 625mW Line Regulation 3V ≤ (VIN − VOUT) ≤ 40V, IL ≤ 20mA (Note 3) 0.02 0.07 Load Regulation 5mA ≤ IOUT ≤ 100mA, (Note 3) 0.3 1.5 Temperature Stability TMIN ≤ TJ ≤ TMax 0.65 Minimum Load Current (VIN − VOUT) ≤ 40V 3.5 5 3V ≤ (VIN − VOUT) ≤ 15V 1.5 2.5 Current Limit % % mA 3V ≤ (VIN − VOUT) ≤ 13V 100 200 300 mA (VIN − VOUT) = 40V 25 50 150 mA Rms Output Noise, % of VOUT TJ = 25˚C, 10Hz ≤ f ≤ 10kHz Ripple Rejection Ratio VOUT = 10V, f = 120Hz, CADJ = 0 CADJ = 10µF 66 0.003 % 65 dB 80 dB Long-Term Stability TJ = 125˚C, 1000 Hours 0.3 Thermal Resistance Z Package 0.4" Leads 180 ˚C/W Junction to Ambient Z Package 0.125 Leads 160 ˚C/W 1 % SO-8 Package 165 ˚C/W 6-Bump micro SMD 290 ˚C/W Note 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 guarantee specific performance limits. Note 2: Unless otherwise noted, these specifications apply: −25˚C ≤ Tj ≤ 125˚C for the LM317L; VIN − VOUT = 5V and IOUT = 40mA. Although power dissipation is internally limited, these specifications are applicable for power dissipations up to 625mW. IMAX is 100mA. Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Thermal resistance of the TO-92 package is 180˚C/W junction to ambient with 0.4" leads from a PC board and 160˚C/W junction to ambient with 0.125" lead length to PC board. Note 5: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. http://www.hgsemi.com.cn 2 2019 SEP LM317L Typical Performance Characteristics (Output capacitor = 0µF unless otherwise noted.) Load Regulation Current Limit Adjustment Current Dropout Voltage Reference Voltage Temperature Stability Minimum Operating Current http://www.hgsemi.com.cn 3 2019 SEP LM317L Typical Performance Characteristics (Output capacitor = 0µF unless otherwise noted.) Ripple Rejection Ripple Rejection Output Impedance Line Transient Response Load Transient Response Thermal Regulation http://www.hgsemi.com.cn 4 (Continued) 2019 SEP LM317L Important statement: Huaguan Semiconductor Co,Ltd. reserves the right to change the products and services provided without notice. Customers should obtain the latest relevant information before ordering, and verify the timeliness and accuracy of this information. Customers are responsible for complying with safety standards and taking safety measures when using our products for system design and machine manufacturing to avoid potential risks that may result in personal injury or property damage. Our products are not licensed for applications in life support, military, aerospace, etc., so we do not bear the consequences of the application of these products in these fields. Our documentation is only permitted to be copied without any tampering with the content, so we do not accept any responsibility or liability for the altered documents. http://www.hgsemi.com.cn 5 2019 SEP