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Details, datasheet, quote on part number:LM237
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| Part: | LM237 |
| Category: | Power Management => Regulators => Voltage Regulators |
| Description: | Three-terminal Adjustable Negative Voltage Regulators |
| Company: | ST Microelectronics, Inc. |
| Datasheet: | Download LM237 datasheet File size : 1861 kB |
| Request For quote: | Find where to buy LM237
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Datasheet text preview:
LM137/LM237 LM337
THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATORS
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OUTPUT VOLTAGE ADJUSTABLE DOWN TO Vref 1.5A GUARANTEED OUTPUT CUR RENT 0.3%/V TYPICAL LOAD R EGULATION 0.01%/V TYPICAL LINE REGULATION C URRENT LIMIT CONSTANT W ITH TEMPERATURE R IPPLE REJECTION: 77dB STAND ARD 3-LEAD TRANSISTOR PACKAGES EXCELLENT TH ERMAL REGULATION: 0.002%/V 50ppm/°C TEMPERATURE COEFFICIENT
TO-220
DESCRIPTION The LM137 series are adjustable 3-terminal negative voltage regulators capable of supplying in excess -1.5A over a -1.2 to -37V output voltage ran ge. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, LM137 regulators are supplied in standard transistor packages which are easily mounted and handled. In addition to higher performance than fixed regulators, the LM137 series offer full overload SCHEMATIC DIAGRAM
TO-3
protection available only in integrated circuits. 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.
March 2003
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LM137-LM237-LM337
AB SOLUTE MAXIMUM RATINGS
Symbol VI - VO IO Ptot Tstg Toper Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range LM137 LM237 LM337 Parameter Input Output Voltage Differential Value 40 1.5 Internally Limited -65 to 150 -55 to 150 -25 to 125 0 to 125 °C °C Unit V A
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
THERMA L DATA
Symbol Rthj-case Rthj-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient Max Max TO-220 3 70 TO-3 4 35 Unit °C/W °C/W
CONNECTION DIAGRAM (top view)
TO-220
T O- 3
ORDERING CODES
TYPE LM137 LM237 LM337 TO-3 LM137K LM237K LM337K TO-220 LM237SP LM337SP TEMPERATURE RANGE -55°C to 150°C -25°C to 150°C 0°C to 125°C
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LM137-LM237-LM337
ELECTRICAL CHARACTERISTICS OF LM137/LM237 (TJ = -55 to 150°C for LM137, TJ = -25 to 150°C for LM237, VI -VO = 5V, IO = 0.5 A unless otherwise specified).
Symbol Vref Parameter Reference Voltage Ta = 25°C |VI - VO| = 3 to 40 V, TJ = Tmin to Tmax |IO| = 10mA to |IO(max)| P Pmax KVI KVO Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Iadj Iadj KVI KVO Adjustment Pin Current Adjustment Pin Current Change Line Regulation (Note 2) Load Regulation (Note 2) Ta = 25°C, |IO| = 10 mA to |IO(max)| |VI - VO| = 3 to 40 V |VI - VO| = 3 to 40 V |IO| = 10mA to |IO(max)| |VI - VO| 40 V |VI - VO| 10 V IOS VN O R vf KV T KVH Short Circuit Output Current |VI - VO| 15 V RMS Output Noise (% of VO) Ripple Rejection Ratio Temperature Stability Long Term Stability Ta = 125°C, 1000 H |VI - VO| = 40 V, TJ =2 5°C Ta = 25°C f = 10 Hz to 10 KHz VO = -10 V, f = 120 Hz Cadj = 10 µF 66 1.5 0.24 |VO| 5 V |VO| 5 V |IO(min)| Minimum Load Current Ta = 25°C |VI - VO| = 3 to 40 V Ta = 25°C |IO| = 10mA to |IO(max)| Ta = 25°C, pulse 10 ms IO = 0.1 A IO = 20 mA |VO| 5 V |VO| 5 V Test Conditions Min. -1.225 -1.2 Typ. -1.25 -1.25 0.01 0.01 15 0.3 0.002 65 2 0.02 20 0.3 2.5 1.2 2.2 0.4 0.003 60 77 0.6 0.3 1 % % % dB Max. -1.275 -1.3 0.02 0.02 25 0.5 0.02 100 5 0.05 50 1 5 3 A mV % %/W µA µA %/V mV % mA %/V Unit V
Notes: 1. Although power dissipation is internally limited, these specifications are applicable for power dissipation of: 15 W for TO-220 and 20 W for TO-3 Package; IO(max) is : 1.5 A 2. 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.
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