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www.DataSheet4U.com LM337 1.5 A, Adjustable Output, Negative Voltage Regulator The LM337 is an adjustable 3−terminal negative voltage regulator capable of supplying in excess of 1.5 A 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 LM337 serves a wide variety of applications including local, on card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM337 can be used as a precision current regulator. Features http://onsemi.com THREE−TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATOR MARKING DIAGRAMS • • • • • • • • Output Current in Excess of 1.5 A Output Adjustable between −1.2 V and −37 V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Constant with Temperature Output Transistor Safe−Area Compensation Floating Operation for High Voltage Applications Eliminates Stocking many Fixed Voltages Available in Surface Mount D2PAK and Standard 3−Lead Transistor Package • Pb−Free Packages are Available 1 D2PAK D2T SUFFIX CASE 936 LM 337yyyy AWLYWWG Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. Pin 1. Adjust 2. Vin 3. Vout Standard Application IPROG + R2 R1 120 IAdj + TO−220AB T SUFFIX CASE 221AB CO** 1.0 mF Heatsink surface connected to Pin 2. 1 Cin* 1.0 mF LM 337xx AWLYWWG Vin −Vin LM337 Vout −Vout *C in is required if regulator is located more than 4 inches from power supply filter. * A 1.0 mF solid tantalum or 10 mF aluminum electrolytic is recommended. **C O is necessary for stability. A 1.0 mF solid tantalum or 10 mF aluminum electrolytic ** is recommended. R V out + –1.25 V 1 ) 2 R1 xx yyyy A WL Y WW G = BT, T = BD2T, D2T = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. © Semiconductor Components Industries, LLC, 2006 1 August, 2006 − Rev. 6 Publication Order Number: LM337/D LM337 MAXIMUM RATINGS (TA = +25°C, unless otherwise noted) Rating Input−Output Voltage Differential Power Dissipation Case 221A TA = +25°C Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Case 936 (D2PAK) TA = +25°C Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Operating Junction Temperature Range Storage Temperature Range Symbol VI−VO Value 40 Unit Vdc PD qJA qJC PD qJA qJC TJ Tstg Internally Limited 65 5.0 Internally Limited 70 5.0 −40 to +125 −65 to +150 W °C/W °C/W W °C/W °C/W °C °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. ELECTRICAL CHARACTERISTICS (|VI−VO| = 5.0 V; IO = 0.5 A for T package; TJ = Tlow to Thigh [Note 1]; Imax and Pmax [Note 2].) Characteristics Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ |VI−VO| ≤ 40 V Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ Imax |VO| ≤ 5.0 V |VO| ≥ 5.0 V Thermal Regulation, TA = +25°C (Note 5), 10 ms Pulse Adjustment Pin Current Adjustment Pin Current Change, 2.5 V ≤ |VI−VO| ≤ 40 V, 10 mA ≤ IL ≤ Imax, PD ≤ Pmax, TA = +25°C Reference Voltage, TA = +25°C, 3.0 V ≤ |VI−VO| ≤ 40 V, 10 mA ≤ IO ≤ Imax, PD ≤ Pmax, TJ = Tlow to Thigh Line Regulation (Note 3), 3.0 V ≤ |VI−VO| ≤ 40 V Load Regulation (Note 3), 10 mA ≤ IO ≤ Imax |VO| ≤ 5.0 V |VO| ≥ 5.0 V Temperature Stability (Tlow ≤ TJ â‰... |
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