IC REGULATOR NEG ADJ TO-39

LM337H

Manufacturer Part NumberLM337H
DescriptionIC REGULATOR NEG ADJ TO-39
ManufacturerNational Semiconductor
LM337H datasheet
 

Specifications of LM337H

Regulator TopologyNegative AdjustableVoltage - Output-1.2 ~ -37 V
Voltage - Input-4.2 ~ -40 VNumber Of Regulators1
Current - Output500mACurrent - Limit (min)500mA
Operating Temperature-55°C ~ 150°CMounting TypeThrough Hole
Package / CaseTO-39-3, TO-205AD, Metal CanLead Free Status / RoHS StatusContains lead / RoHS non-compliant
Voltage - Dropout (typical)-Other names*LM337H
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LM137/LM337
3-Terminal Adjustable Negative Regulators
General Description
The LM137/LM337 are adjustable 3-terminal negative volt-
age regulators capable of supplying in excess of −1.5A over
an output voltage range of −1.2V to −37V. These regulators
are exceptionally easy to apply, requiring only 2 external
resistors to set the output voltage and 1 output capacitor for
frequency compensation. The circuit design has been opti-
mized for excellent regulation and low thermal transients.
Further, the LM137 series features internal current limiting,
thermal shutdown and safe-area compensation, making
them virtually blowout-proof against overloads.
The LM137/LM337 serve a wide variety of applications in-
cluding local on-card regulation, programmable-output volt-
age regulation or precision current regulation. The LM137/
LM337 are ideal complements to the LM117/LM317
adjustable positive regulators.
Features
n Output voltage adjustable from −1.2V to −37V
n 1.5A output current guaranteed, −55˚C to +150˚C
n Line regulation typically 0.01%/V
n Load regulation typically 0.3%
Typical Applications
Adjustable Negative Voltage Regulator
Full output current not available at high input-output voltages
C1 = 1 µF solid tantalum or 10 µF aluminum electrolytic required for
stability
*C2 = 1 µF solid tantalum is required only if regulator is more than 4" from
power-supply filter capacitor
Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum
electrolytic are commonly used to provide improved output impedance and
rejection of transients
© 2004 National Semiconductor Corporation
n Excellent thermal regulation, 0.002%/W
n 77 dB ripple rejection
n Excellent rejection of thermal transients
n 50 ppm/˚C temperature coefficient
n Temperature-independent current limit
n Internal thermal overload protection
+
n P
Product Enhancement tested
n Standard 3-lead transistor package
n Output is short circuit protected
LM137 Series Packages and Power Capability
Device
LM137/337
LM337
LM337
Comparison between SOT-223 and
D-Pak (TO-252) Packages
00906701
DS009067
November 2004
Rated
Design
Package
Power
Load
Dissipation
Current
TO-3 (K)
20W
1.5A
TO-39 (H)
2W
0.5A
TO-220 (T)
15W
1.5A
SOT-223
2W
1A
(MP)
00906731
Scale 1:1
www.national.com

LM337H Summary of contents

  • Page 1

    ... Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients © 2004 National Semiconductor Corporation n Excellent thermal regulation, 0.002%/ ripple rejection n Excellent rejection of thermal transients n 50 ppm/˚C temperature coefficient ...

  • Page 2

    ... Absolute Maximum Ratings 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Operating Junction Temperature Range LM137 Electrical Characteristics Parameter Line Regulation T j (Note 2) I Load Regulation ...

  • Page 3

    Electrical Characteristics Note 4: Refer to RETS137H drawing for LM137H or RETS137K drawing for LM137K military specifications. Schematic Diagram Thermal Regulation When power is dissipated in an IC, a temperature gradient occurs across the IC chip affecting the individual IC ...

  • Page 4

    ... FIGURE 2. Case Is Input Note 5: See STD Mil DWG 5962P99517 for Radiation Tolerant Devices 00906705 Order Number LM137H, LM137H/883 or LM337H LM137HPQML and LM137HPQMLV(Note 5) See NS Package Number H03A 4 00906704 TO-39 ...

  • Page 5

    Connection Diagrams TO-220 Plastic Package Front View Order Number LM337T See NS Package Number T03B Application Hints When a value for θ is found using the equation shown, (H−A) a heatsink must be selected that has a value that is ...

  • Page 6

    Typical Applications Adjustable Lab Voltage Regulator Full output current not available at high input-output voltages *The 10 µF capacitors are optional to improve ripple rejection Current Regulator Negative Regulator with Protection Diodes *When C is larger than 20 µF, D1 ...

  • Page 7

    Typical Performance Characteristics Load Regulation Adjustment Current Temperature Stability (K Steel and T Packages) 00906716 00906718 Minimum Operating Current 00906720 7 Current Limit 00906717 Dropout Voltage 00906719 00906721 www.national.com ...

  • Page 8

    Typical Performance Characteristics Ripple Rejection Ripple Rejection Line Transient Response www.national.com (K Steel and T Packages) (Continued) 00906722 00906724 Load Transient Response 00906726 8 Ripple Rejection 00906723 Output Impedance 00906725 00906727 ...

  • Page 9

    ... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM137H, LM137H/883 or LM337H Metal Can Package (H) NS Package Number H03A 9 www.national.com ...

  • Page 10

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) Metal Can Package (K) Order Number LM337K STEEL NS Package Number K02A Mil-Aero Metal Can Package (K) Order Number LM137K/883 NS Package Number K02C 10 ...

  • Page 11

    Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead SOT-223 Package Order Number LM337IMP NS Package Number MP04A 11 www.national.com ...

  • Page 12

    ... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...