Maker : Motorola Inc
Part No. : LM337MT

  Datasheet PDF : LM337MT.pdf
  Cross Reference : LM337MT Cross Reference
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Product Information

Order this document by LM337M/D LM337M Three-Terminal Adjustable Output Negative Voltage Regulator The LM337M is an adjustable three–terminal negative 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 LM337M 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 LM337M can be used as a precision current regulator. • Output Current in Excess of 500 mA MEDIUM CURRENT THREE–TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATOR SEMICONDUCTOR TECHNICAL DATA • • • • • • • 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 Standard 3–Lead Transistor Packages Eliminates Stocking Many Fixed Voltages T SUFFIX PLASTIC PACKAGE CASE 221A Pin 1. Adjust 2. Vin 3. Vout 1 2 3 Standard Application IPROG + Cin * 1.0µF R2 R1 120 IAdj Adjust Vin –Vin LM337M Vout –Vout CO ** + 1.0µF *Cin is required if regulator is located more than 4″ from power supply filter. **A 1.0 µF solid tantalum or 10 µF aluminum electrolytic is recommended. **CO is necessary for stability. A 1.0 µF solid tantalum or 10 µF aluminum **electrolytic is recommeded. Vout ORDERING INFORMATION Device LM337MT Operating Temperature Range TJ = 0° to +125°C Package Plastic Power Rev 1 + –1.25 V 1 ) R2 R1 © Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA 1 LM337M MAXIMUM RATINGS Rating Input–Output Voltage Differential Power Dissipation Operating Junction Temperature Range Storage Temperature Range Symbol VI–VO PD TJ Tstg Value 40 Internally Limited 0 to +125 –65 to +150 Unit Vdc W °C °C ELECTRICAL CHARACTERISTICS (|VI – VO| = 5.0 V, IO = 0.1; TJ = Tlow to Thigh [Note 1], Pmax per Note 2, unless otherwise noted.) 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 ≤ 0.5 A |VO| ≤ 5.0V |VO| ≥ 5.0V Thermal Regulation 10 ms Pulse, TA = 25°C Adjustment Pin Current Adjustment Pin Current Change 2.5 V ≤ |VI–VO| ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax, TA = 25°C Reference Voltage 3.0 V ≤ |VI–VO| ≤ 40 V, 10 mA ≤ IO ≤ 0.5 A, PD ≤ Pmax, TA = 25°C Tlow to Thigh Line Regulation (Note 3) 3.0 V ≤ |VI–VO| ≤ 40 V Load Regulation (Note 3) 10 mA ≤ IO ≤ 0.5 A |VO| ≤ 5.0 V |VO| ≥ 5.0 V Temperature Stability (Tlow ≤ TJ ≤ Thigh) Minimum Load Current to Maintain Regulation (|VI–VO| ≤ 10 V) (|VI–VO| ≤ 40 V) Maximum Output Current |VI–VO| ≤ 15 V, PD ≤ Pmax |VI–VO| ≤ 40 V, PD ≤ Pmax, TJ = 25°C RMS Noise, % of VO TA = 25°C, 10 Hz ≤ f ≤ 10 kHz Ripple Rejection, VO = –10 V, f = 120 Hz (Note 4) Without CAdj CAdj = 10 µF Long Term Stability, TJ = Thigh (Note 5) TA = 25°C for Endpoint Measurements Thermal Resistance, Junction–to–Case Figure 1 2 Symbol Regline Regload – – – 3 1, 2 Regtherm IAdj ∆IAdj – – – 15 0.3 0.03 65 2.0 15 1.0 0.04 100 5.0 mV %/VO % VO/W µA µA Min – Typ 0.01 Max 0.04 Unit %/V 3 Vref –1.213 –1.20 –1.250 –1.25 0.02 –1.287 –1.30 0.07 V 1 2 Regline Regload – %/V – – 3 3 TS ILmin – – 3 Imax 0.5 0.1 – 4 N RR – 66 3 – S RΘJC – – – – 20 0.3 0.6 1.5 2.5 0.9 0.25 0.003 70 1.5 – 6.0 10 mV %/VO %/VO mA A – – – %/VO dB 60 77 0.3 7.0 – – 1.0 – %/1.0 k Hrs °C/W NOTES: 1. Tlow to Thigh = 0° to +125°C 2. Pmax = 7.5 W 3 Load and line regulation are specified at constant junctio...

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