TL317 3-TERMINAL ADJUSTABLE REGULATORS SLVS004C – APRIL 1979 – REVISED JULY 1999 D D D D D Output Voltage Range Adjustable From 1.2 V to 32 V When Used With an External Resistor Divider Output Current Capability of 100 mA Input Regulation Typically 0.01% Per Input-Voltage Change Output Regulation Typically 0.5% Ripple Rejection Typically 80 dB D PACKAGE (TOP VIEW) INPUT OUTPUT OUTPUT ADJUSTMENT 1 8 2 7 3 6 4 5 NC OUTPUT OUTPUT NC NC – No internal connection OUTPUT terminals are all internally connected. description LP PACKAGE (TOP VIEW) The TL317 is an adjustable three-terminal positive-voltage regulator capable of supplying 100 mA over an output-voltage range of 1.2 V to 32 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. INPUT OUTPUT ADJUSTMENT In addition to higher performance than fixed regulators, this regulator offers full overload protection available only in integrated circuits. Included on the chip are current-limiting and thermal-overload protection. All overload-protection circuitry remains fully functional, even when ADJUSTMENT is disconnected. Normally, no capacitors are needed unless the device is situated far from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. ADJUSTMENT can be bypassed to achieve very high ripple rejection, which is difficult to achieve with standard three-terminal regulators. In addition to replacing fixed regulators, the TL317 regulator 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. Its primary application is that of a programmable output regulator, but by connecting a fixed resistor between ADJUSTMENT and OUTPUT, this device can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping ADJUSTMENT to ground, programming the output to 1.2 V, where most loads draw little current. The TL317C is characterized for operation over the virtual junction temperature range of 0°C to 125°C. AVAILABLE OPTIONS PACKAGED DEVICES TJ SMALL OUTLINE (D) PLASTIC (LP) CHIP FORM (Y) 0°C to 125°C TL317CD TL317CLP TL317Y The D and LP packages are available taped and reeled. Add the suffix R to device type (e.g., TL317CDR). Chip forms are tested at 25°C. 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. Copyright 1999, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 TL317 3-TERMINAL ADJUSTABLE REGULATORS SLVS004C – APRIL 1979 – REVISED JULY 1999 schematic INPUT 310 Ω 310 Ω 251 Ω 190 Ω 5.6 kΩ 2.1 kΩ 200 kΩ 11.5 kΩ 124 Ω 1.4 Ω 2.12 kΩ 30 pF 195 Ω 360 Ω 5.3 kΩ 5.7 kΩ 70 Ω 5.1 kΩ 30 pF 670 Ω 10.8 kΩ OUTPUT ADJUSTMENT 40 Ω NOTE A: All component values shown are nominal. absolute maximum ratings over operating temperature range (unless otherwise noted)† Input-to-output differential voltage, Vl – VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Operating free-air, TA, case, or virtual-junction temperature range, TJ: TL317C . . . . . . . . . . . . 0°C to 150°C Package thermal impedance, θJA (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 156°C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. recommended operating conditions MIN MAX 35 V 2.5 100 mA 0 125 °C Input-to-output voltage differential, VI – VO Output current, IO Operating virtual-junction temperature, TJ 2 TL317C POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT TL317 3-TERMINAL ADJUSTABLE REGULATORS SLVS004C – APRIL 1979 – REVISED JULY 1999 electrical characteristics over recommended operating virtual-junction temperature range (unless otherwise noted) TEST CONDITIONS† PARAMETER TL317C MIN TYP MAX Input voltage regulation (see Note 3) VI – VO = 5 V to 35 V TJ = 25°C IO = 2.5 mA to 100 mA 0.01 0.02 0.02 0.05 VO = 10 V, f = 120 Hz VO = 10 V, 10-µF capacitor between ADJUSTMENT and ground 65 Ripple regulation Output Out ut voltage regulation VI = 5 V to 35 V, IO = 2.5 2 5 mA to 100 mA, mA TJ = 25°C VI = 5 V to 35 V,, IO = 2.5 mA to 100 mA Output voltage change with temperature mV VO ≥ 5 V 5 mV/V VO ≤ 5 V VO ≥ 5 V 50 mV 10 mV/V Output noise voltage f = 10 Hz to 10 kHz, Minimum output current to maintain regulation VI – VO = 35 V VI – VO ≤ 35 V 10 3 TJ = 25°C 100 ADJUSTMENT current Reference voltage (output to ADJUSTMENT) IO = 2.5 mA to 100 mA IO = 2.5 mA to 100 mA, mV/V 10 1.2 mV/V µV/V 30 1.5 VI – VO = 2.5 V to 35 V, VI – VO = 5 V to 35 V, P ≤ rated dissipation dB 80 25 Output voltage long-term drift Change in ADJUSTMENT current %V VO ≤ 5 V TJ = 0°C to 125°C After 1000 hours at TJ = 125°C and VI – VO = 35 V Peak output current 66 UNIT 2.5 200 mA mA 50 100 µA 0.2 5 µA 1.25 1.3 V † Unless otherwise noted, these specifications apply for the following test conditions: VI – VO = 5 V and IO = 40 mA. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible. All characteristics are measured with a 0.1-µF capacitor across the input and a 1-µF capacitor across the output. NOTE 3: Input voltage regulation is expressed here as the percentage change in output voltage per 1-V change at the input. electrical characteristics over recommended operating conditions, TJ = 25°C (unless otherwise noted) TEST CONDITIONS† PARAMETER Input voltage regulation (see Note 3) VI – VO = 5 V to 35 V VO = 10 V, VO = 10 V, 10-µF capacitor between ADJUSTMENT and ground Output voltage regulation 2 5 mA to 100 mA IO = 2.5 Output noise voltage f = 10 Hz to 10 kHz Minimum output current to maintain regulation VI – VO = 35 V VI – VO ≤ 35 V VO ≤ 5 V VO ≥ 5 V ADJUSTMENT current Change in ADJUSTMENT current Reference voltage (output to ADJUSTMENT) VI – VO = 2.5 V to 35 V, VI – VO = 5 V to 35 V, P ≤ rated dissipation MIN TYP 0.01 f = 120 Hz Ripple regulation Peak output current TL317Y IO = 2.5 mA to 100 mA IO = 2.5 mA to 100 mA, MAX UNIT %V 65 80 dB 25 mV 5 mV/V 30 µV/V 1.5 mA 200 mA 50 µA 0.2 µA 1.25 V † Unless otherwise noted, these specifications apply for the following test conditions: VI – VO = 5 V and IO = 40 mA. Pulse-testing techniques must be used that maintain the junction temperature as close to the ambient temperature as possible. All characteristics are measured with a 0.1-µF capacitor across the input and a 1-µF capacitor across the output. NOTE 3: Input voltage regulation is expressed here as the percentage change in output voltage per 1-V change at the input. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TL317 3-TERMINAL ADJUSTABLE REGULATORS SLVS004C – APRIL 1979 – REVISED JULY 1999 APPLICATION INFORMATION TL317 VI Input VO (see Note B) Output Adjustment C1 = 0.1 µF (see Note A) TL317 35 V R1 470 Ω Input Adjustment C2 = 1 µF (see Note C) R1 = 120 Ω R3 = 820 Ω NOTES: A. Use of an input bypass capacitor is recommended if regulator is far from the filter capacitors. B. Output voltage is calculated from the equation: VO V ref 1 R2 R1 where: Vref equals the difference between OUTPUT and ADJUSTMENT voltages (≈1.25 V). C. Use of an output capacitor improves transient response but is optional. + ǒ) Ǔ VO (see Note A) –10 V C1 = 0.1 µF R2 Output R2 = 3 kΩ 1N4002 ǒ) Ǔ* NOTE A: Output voltage is calculated from the equation: VO V ref 1 R2 R3 10 V R1 where: Vref equals the difference between OUTPUT and ADJUSTMENT voltages (≈1.25 V). + Figure 1. Adjustable Voltage Regulator ) Figure 2. 0-V to 30-V Regulator Circuit TL317 VI Input VO (see Note A) Output R1 = 470 Ω Adjustment C1 = 0.1 µF D1† 1N4002 + R2 = 10 kΩ + – C2 = 10 µF – C3 = 1 µF TL317 VI † D1 discharges C2 if output is shorted to ground. NOTE A: Use of an output capacitor improves transient response but is optional. Figure 3. Regulator Circuit With Improved Ripple Rejection 4 POST OFFICE BOX 655303 Input I limit Output Adjustment R1 + 1.25 R1 Figure 4. Precision Current-Limiter Circuit • DALLAS, TEXAS 75265 TL317 3-TERMINAL ADJUSTABLE REGULATORS SLVS004C – APRIL 1979 – REVISED JULY 1999 APPLICATION INFORMATION R2 = 1.5 kΩ TL317 R1 = 470 Ω Input VI Adjustment VI Input Adjustment Output VO = 15 V Output R1 = 470 Ω 1N4002 TL317 TL317 Input Output Adjustment C1 = 0.1 µF C2 = 1 µF VO R3 = 50 kΩ R3 = 240 Ω R2 = 5.1 kΩ Output Adjust R4 = 2 kΩ Figure 5. Tracking Preregulator Circuit 2N2905 C1 = 25 µF Figure 6. Slow Turnon 15-V Regulator Circuit TL317 VI Input Output Adjustment 240 Ω TL317 VI Input 24 Ω 1.1 kΩ ICHG Output Adjustment VBE Figure 7. 50-mA Constant-Current Battery Charger Circuit POST OFFICE BOX 655303 R + IV BE CHG V– Figure 8. Current-Limited 6-V Charger • DALLAS, TEXAS 75265 5 TL317 3-TERMINAL ADJUSTABLE REGULATORS SLVS004C – APRIL 1979 – REVISED JULY 1999 APPLICATION INFORMATION TIP73 2N2905 VI 500 Ω 5 kΩ TL317 22 Ω Input Output Adjustment VO 120 Ω 1N4002 10 µF RL† 5 kΩ 10 µF‡ † Minimum load current is 30 mA. ‡ Optional capacitor improves ripple rejection Figure 9. High-Current Adjustable Regulator 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 47 µF IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 1999, Texas Instruments Incorporated