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LM337KVURG3

LM337KVURG3

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    TO252

  • 描述:

    IC REG LIN NEG ADJ 1.5A TO252-3

  • 数据手册
  • 价格&库存
LM337KVURG3 数据手册
Sample & Buy Product Folder Support & Community Tools & Software Technical Documents LM237, LM337 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 LMx37 3-Terminal Adjustable Regulators 1 Features 3 Description • The LM237 and LM337 are adjustable 3-terminal negative-voltage regulators capable of supplying in excess of –1.5 A over an output voltage range of –1.2 V to –37 V. They require only two external resistors to set the output voltage and one output capacitor for frequency compensation. 1 • • • • • • Output Voltage Range Adjustable From –1.2 V to –37 V Output Current Capability of 1.5 A Max Input Regulation Typically 0.01% Per InputVoltage Change Output Regulation Typically 0.3% Peak Output Current Constant Over Temperature Range of Regulator Ripple Rejection Typically 77 dB Direct Replacement for Industry-Standard LM237 and LM337 Device Information(1) PART NUMBER LMx37 • • • BODY SIZE (NOM) 10.16 mm x 8.82 mm TO-263 (4) 10.16 mm x 9.02 mm TO-252 (4) 6.6 mm x 6.10 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. 2 Applications • PACKAGE TO-220 (4) Applications Requiring Negative Output Voltage or Precision Current Regulation Consumer Electronics End Equipment Portable Applications 4 Simplified Schematic LM237 or LM337 INPUT VI OUTPUT VO ADJUSTMENT R1 C1 C2 + + R2 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM237, LM337 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Simplified Schematic............................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 1 2 3 4 7.1 7.2 7.3 7.4 7.5 7.6 7.7 4 4 4 4 5 5 6 Absolute Maximum Ratings ..................................... ESD Ratings.............................................................. Recommended Operating Conditions...................... Thermal Information .................................................. Electrical Characteristics.......................................... Electrical Characteristics.......................................... Typical Characteristics .............................................. Detailed Description .............................................. 7 8.1 Overview ................................................................... 7 8.2 Functional Block Diagram ......................................... 7 8.3 Design Schematic ..................................................... 8 8.4 Feature Description................................................... 8 8.5 Device Functional Modes.......................................... 8 9 Application and Implementation .......................... 9 9.1 Application Information.............................................. 9 9.2 Typical Application ................................................... 9 10 Power Supply Recommendations ..................... 10 11 Layout................................................................... 11 11.1 Layout Guidelines ................................................. 11 11.2 Layout Example .................................................... 11 12 Device and Documentation Support ................. 11 12.1 12.2 12.3 12.4 Related Links ........................................................ Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 11 11 11 11 13 Mechanical, Packaging, and Orderable Information ........................................................... 11 5 Revision History Changes from Revision K (November 2007) to Revision L Page • Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table, Typical Characteristics, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1 • Deleted Ordering Information table. ....................................................................................................................................... 1 2 Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 LM237, LM337 www.ti.com SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 6 Pin Configuration and Functions OUTPUT INPUT ADJUSTMENT LM337...KCS (TO-220) PACKAGE (TOP VIEW) INPUT INPUT LM237, LM337...KC (TO-220) PACKAGE (TOP VIEW) LM337...KTE, KTP, OR KVU PACKAGE (TOP VIEW) LM337...KTT (TO-263) PACKAGE (TOP VIEW) INPUT ADJUSTMENT OUTPUT INPUT OUTPUT INPUT OUTPUT INPUT ADJUSTMENT INPUT ADJUSTMENT Pin Functions PIN NAME NO. TYPE DESCRIPTION ADJUSTMENT 1 I Adjustment pin for the output voltage. Connect two external resistors to adjust the output voltage. INPUT 2 I Input voltage. The input voltage and current will be designated VI and II respectively. OUTPUT 3 O Output voltage. The output voltage and current will be designated VO and IO respectively. Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 3 LM237, LM337 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 www.ti.com 7 Specifications 7.1 Absolute Maximum Ratings over operating temperature ranges (unless otherwise noted) (1) MIN VI – VO Input-to-output differential voltage TJ Operating virtual junction temperature Lead temperature Tstg (1) MAX UNIT –40 V 150 °C 260 °C 150 °C 1.6 mm (1/16 in) from case for 10 s Storage temperature range –65 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. 7.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins (1) 1500 Charged device model (CDM), per JEDEC specification JESD22-C101, all pins (2) 1500 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 7.3 Recommended Operating Conditions MIN VI-VO Input-to-output differential voltage IO Output current TJ Operating virtual junction temperature MAX -2.5 -37 |VI – VO| ≤ 40 V, P ≤ 15 W 10 1500 |VI – VO| ≤ 10 V, P ≤ 15 W 6 1500 LM237 –25 150 LM337 0 125 UNIT mA °C 7.4 Thermal Information LM237 THERMAL METRIC (1) RθJA Junction-to-ambient thermal resistance RθJC(top Junction-to-case (top) thermal resistance LMx37 LM337 KC KCS KTE KTP KTT KVU 4 PINS 4 PINS 4 PINS 4 PINS 4 PINS 4 PINS 24.8 24.8 23 28 25.3 30.3 3 3 3 19 30.3 N/A UNIT °C/W ) (1) 4 For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953). Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 LM237, LM337 www.ti.com 7.5 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 Electrical Characteristics over recommended ranges of operating virtual junction temperature (unless otherwise noted) TEST CONDITIONS (1) PARAMETER Input regulation (2) Ripple rejection VI – VO = –3 V to –40 V LM237 MIN LM337 TYP MAX TJ = 25°C 0.01 TJ = MIN to MAX 0.02 VO = –10 V, f = 120 Hz MIN TYP MAX 0.02 0.01 0.04 0.05 0.02 0.07 60 VO = –10 V, f = 120 Hz, CADJ = 10 μF 66 |VO| ≤ 5 V IO = 10 mA to 1.5 A, TJ = 25°C IO = 10 mA to 1.5 A 66 0.3% 50 0.5% 0.3% — |VO| ≤ 5 V 50 70 mV |VO| ≥ 5 V 1% 1.5% — TJ = MIN to MAX Output-voltage long-term drift After 1000 h at TJ = MAX and VI – VO = –40 V Output noise voltage f = 10 Hz to 10 kHz, TJ = 25°C Minimum output current to maintain regulation |VI – VO| ≤ 40 V 2.5 5 2.5 10 |VI – VO| ≤ 10 V 1.2 3 1.5 6 0.6% 0.3% |VI – VO| ≤ 15 V |VI – VO| ≤ 40 V, TJ = 25°C Change in ADJUSTMENT current VI – VO = –2.5 V to –40 V, IO = 10 mA to MAX, TJ = 25°C Reference voltage (OUTPUT to ADJUSTMENT) VI – VO = –3 V to –40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation Thermal regulation Initial TJ = 25°C, 10-ms pulse (2) 7.6 0.6% 1% 0.3% 0.003% TJ = 25°C TJ = MIN to MAX — 1% 0.003% 1.5 2.2 1.5 2.2 0.24 0.4 0.15 0.4 — — mA A 65 100 65 100 μA 2 5 2 5 μA –1.225 –1.25 –1.275 –1.213 –1.25 –1.287 –1.2 –1.25 –1.3 –1.2 –1.25 –1.3 0.002 0.02 0.003 0.04 ADJUSTMENT current (1) mV 1% Output-voltage change with temperature Peak output current %/V dB 77 25 |VO| ≥ 5 V Output regulation 60 77 UNIT V %/W Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IO = 0.5 A. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. All characteristics are measured with a 0.1-μF capacitor across the input and a 1-μF capacitor across the output. Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input. Electrical Characteristics TJ = 25°C Input regulation (2) Ripple rejection LM237, LM337 TEST CONDITIONS (1) PARAMETER MIN VI – VO = –3 V to –40 V VO = –10 V, f = 120 Hz TYP MAX 0.01 0.04 60 VO = –10 V, f = 120 Hz, CADJ = 10 μF 66 50 mV 1% — Output regulation IO = 10 mA to 1.5 A Output noise voltage f = 10 Hz to 10 kHz Minimum output current to maintain regulation |VI – VO| ≤ 40 V 2.5 10 |VI – VO| ≤ 10 V 1.5 6 Peak output current |VO| ≥ 5 V 0.3% 0.003% |VI – VO| ≤ 15 V 1.5 2.2 |VI – VO| ≤ 40 V 0.15 0.4 ADJUSTMENT current Change in ADJUSTMENT current VI – VO = –2.5 V to –40 V, IO = 10 mA to MAX Reference voltage (OUTPUT to ADJUSTMENT) VI – VO = –3 V to –40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation (1) (2) –1.213 %/V dB 77 |VO| ≤ 5 V UNIT — mA A 65 100 μA 2 5 μA –1.25 –1.287 V Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IO = 0.5 A. All characteristics are measured with a 0.1μF capacitor across the input and a 1-μF capacitor across the output. Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input. Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 5 LM237, LM337 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 www.ti.com 7.7 Typical Characteristics Adjustment to output voltage (V) ±1.240 ±1.250 V(REF) ±1.260 0 300 600 900 1200 Load current (mA) 1500 C001 Figure 1. Adjustment Voltage vs Load current (VIN = -4.3 V) 6 Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 LM237, LM337 www.ti.com SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 8 Detailed Description 8.1 Overview The LMx37 devices are adjustable 3-terminal negative-voltage regulators capable of supplying in excess of –1.5 A over an output voltage range of –1.2 V to –37 V. They are exceptionally easy to use, requiring only two external resistors to set the output voltage and one output capacitor for frequency compensation. The current design is optimized for excellent regulation and low thermal transients. In addition, LM237 and LM337 feature internal current limiting, thermal shutdown, and safe-area compensation, making them virtually immune to failure by overloads. The LMx37 devices serve a wide variety of applications, including local on-card regulation, programmable output-voltage regulation, and precision current regulation. 8.2 Functional Block Diagram OUTPUT IADJ + ADJUST + 1.25 V Over temp & over current protection INPUT Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 7 LM237, LM337 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 www.ti.com 8.3 Design Schematic ADJUSTMENT OUTPUT INPUT 8.4 Feature Description 8.4.1 Output Voltage Adjustment The ADJUSTMENT pin serves as a voltage adjustment reference for the output. The ADJUSTMENT pin can be attached to a resistor divider circuit to adjust its own voltage level. The reference voltage VADJUSTMENT will typically be 1.25 V higher than VO. 8.5 Device Functional Modes 8.5.1 Adjustable Output Mode The device has a single functional mode: Adjustable output voltage mode. A resistor divider circuit on the ADJUSTMENT pin determines the output voltage. 8 Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 LM237, LM337 www.ti.com SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information 9.1.1 General Configurations LM237 or LM337 RS VI INPUT IOUT OUTPUT VO ADJUSTMENT RS = 1.25 V ILIMIT Figure 2. Current-Limiting Circuit This application uses the LMx37 device's reference voltage, combined with the series resistor RS, to limit the current to 1.25 V ÷ RS 9.2 Typical Application LM237 or LM337 INPUT VI OUTPUT VO ADJUSTMENT R1 C1 C2 + + R2 Figure 3. Adjustable Negative-Voltage Regulator 9.2.1 Design Requirements • 1-µF solid tantalum on the input pin if the regulator is more than 10 cm from the power supply filter capacitor • 1-µF solid tantalum or 10-µF aluminum electrolytic capacitor is required on the output pin for stability. • R1, which is usually 120 Ω as part of the resistor divider. • R2, which can be varied to change the value of VO. Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 9 LM237, LM337 SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 www.ti.com Typical Application (continued) 9.2.2 Detailed Design Procedure VO is determined by the values of R1 and R2. Choosing R1 = 120 Ω means that about 10.42 mA of current will flow through R1. The ~10 mA of current satisfies the minimum operating current and renders IREF negligible. Since the current is coming from ground, the same amount of current will flow through R2. Therefore, the size of R2 will be the dominant factor in adjusting VO. The relationship between R1, R2, and VO is as follows: æ - VO ö - 1÷ R2 = R1ç è -1.25 ø where VO is the output in volts. (1) 9.2.3 Application Curves 80 CADJ = 10 µF CADJ = 0 µF Ripple Rejection (dB) 70 60 50 40 30 20 10 0 10 100 1k 10k Frequency (Hz) 100k 1m D001 Figure 4. Ripple Rejection Over Frequency 10 Power Supply Recommendations For best performance, the difference in voltage between the output and input must be between -2.5 V and -37 V. A 1-µF solid tantalum capacitor is required on the input pin if the regulator is more than 10 cm from the power supply filter capacitor. A 1-µF solid tantalum or 10-µF aluminum electrolytic capacitor is required on the output pin for stability. 10 Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 LM237, LM337 www.ti.com SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015 11 Layout 11.1 Layout Guidelines Traces on the input and output pins should be thick enough to carry 1.5 A of current without violating thermal requirements of the device or the system. In addition, a 1-µF solid tantalum capacitor is required on the input pin if the regulator is more than 10 cm from the power supply filter capacitor. A 1-µF solid tantalum or 10-µF aluminum electrolytic capacitor is required on the output pin for stability. 11.2 Layout Example 1-PF tantalum or 10-PF aluminum OUTPUT Thicker traces for 1.5 A INPUT ADJUSTMENT Thin traces for IADJUSTMENT (negligible) 1-PF tantalum if >10 cm from supply capacitor Figure 5. Layout Diagram 12 Device and Documentation Support 12.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 1. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY LM237 Click here Click here Click here Click here Click here LM337 Click here Click here Click here Click here Click here 12.2 Trademarks 12.3 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Submit Documentation Feedback Copyright © 1981–2015, Texas Instruments Incorporated Product Folder Links: LM237 LM337 11 PACKAGE OPTION ADDENDUM www.ti.com 4-Feb-2021 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) LM237KCSE3 ACTIVE TO-220 KCS 3 50 RoHS & Green SN N / A for Pkg Type -25 to 150 LM237 LM337KCSE3 ACTIVE TO-220 KCS 3 50 RoHS & Green SN N / A for Pkg Type 0 to 125 LM337 LM337KTTR ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS & Green SN Level-3-245C-168 HR 0 to 125 LM337 LM337KTTRG3 ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS & Green SN Level-3-245C-168 HR 0 to 125 LM337 LM337KVURG3 ACTIVE TO-252 KVU 3 2500 RoHS & Green SN Level-3-260C-168 HR 0 to 125 LM337 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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