JAJS772E June   1999  – July 2018 LM2574 , LM2574HV

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      代表的なアプリケーション(固定出力電圧版)
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics for All Output Voltage Versions
    6. 6.6  Electrical Characteristics – 3.3-V Version
    7. 6.7  Electrical Characteristics – 5-V Version
    8. 6.8  Electrical Characteristics – 12-V Version
    9. 6.9  Electrical Characteristics – 15-V Version
    10. 6.10 Electrical Characteristics – Adjustable Version
    11. 6.11 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Current Limit
      2. 7.3.2 Undervoltage Lockout
      3. 7.3.3 Delayed Start-Up
      4. 7.3.4 Adjustable Output, Low-Ripple Power Supply
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Capacitor (CIN)
      2. 8.1.2 Inductor Selection
      3. 8.1.3 Inductor Ripple Current
      4. 8.1.4 Output Capacitor
      5. 8.1.5 Catch Diode
      6. 8.1.6 Output Voltage Ripple and Transients
      7. 8.1.7 Feedback Connection
      8. 8.1.8 ON/OFF Input
      9. 8.1.9 Additional Applications
        1. 8.1.9.1 Inverting Regulator
        2. 8.1.9.2 Negative Boost Regulator
    2. 8.2 Typical Applications
      1. 8.2.1 Fixed Output Voltage Applications
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 8.2.1.2.2 Inductor Selection (L1)
          3. 8.2.1.2.3 Output Capacitor Selection (COUT)
          4. 8.2.1.2.4 Catch Diode Selection (D1)
          5. 8.2.1.2.5 Input Capacitor (CIN)
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Adjustable Output Voltage Applications
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Programming Output Voltage
          2. 8.2.2.2.2 Inductor Selection (L1)
          3. 8.2.2.2.3 Output Capacitor Selection (COUT)
          4. 8.2.2.2.4 Catch Diode Selection (D1)
          5. 8.2.2.2.5 Input Capacitor (CIN)
        3. 8.2.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Grounding
    4. 10.4 Thermal Considerations
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
      1. 11.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 11.1.2 WEBENCH®ツールによるカスタム設計
      3. 11.1.3 デバイスの項目表記
        1. 11.1.3.1  降圧レギュレータ
        2. 11.1.3.2  昇降圧レギュレータ
        3. 11.1.3.3  デューティ・サイクル(D)
        4. 11.1.3.4  キャッチ・ダイオードまたは電流ステアリング・ダイオード
        5. 11.1.3.5  コンデンサの等価直列抵抗(ESR)
        6. 11.1.3.6  等価直列インダクタンス(ESL)
        7. 11.1.3.7  出力リップル電圧
        8. 11.1.3.8  コンデンサのリップル電流
        9. 11.1.3.9  スタンバイ時静止電流(ISTBY)
        10. 11.1.3.10 インダクタのリップル電流(ΔIIND)
        11. 11.1.3.11 連続/不連続モードの動作
        12. 11.1.3.12 インダクタの飽和
        13. 11.1.3.13 動作電圧のマイクロ秒定数(E・Top)
    2. 11.2 ドキュメントのサポート
      1. 11.2.1 関連資料
    3. 11.3 ドキュメントの更新通知を受け取る方法
    4. 11.4 コミュニティ・リソース
    5. 11.5 商標
    6. 11.6 静電気放電に関する注意事項
    7. 11.7 Glossary
  12. 12メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

6.5 Electrical Characteristics for All Output Voltage Versions

TJ = 25°C, and MIN and MAX apply over full operating temperature range. VIN = 12 V for the 3.3-V, 5-V, and adjustable version, VIN = 25 V for the 12-V version, and VIN = 30 V for the 15-V version, ILOAD = 100 mA (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN(1) TYP   MAX(1) UNIT
Ib Feedback bias current Adjustable version only, VOUT = 5 V TJ = 25°C 50 100 nA
–40°C < TJ < 125°C 500
fO Oscillator frequency See(2) TJ = 25°C 47 52 58 kHz
–40°C < TJ < 125°C 42 63
VSAT Saturation voltage IOUT = 0.5 A(3) TJ = 25°C 0.9 1.2 V
–40°C < TJ < 125°C 1.4
DC Maximum duty cycle (ON) See(4) 93% 98%
ICL Current limit Peak current(2)(3) 0.7 1 1.6 A
0.65 1.8
IL Current output leakage Output = 0 V 2 mA
Output = –1 V(5)(6) 7.5 30
IQ Quiescent current See(5) 5 10 mA
ISTBY Standby quiescent current ON/OFF pin = 5 V (OFF) 50 200 μA
ON/OFF CONTROL (SEE Figure 27)
VIH ON/OFF pin logic input level VOUT = 0 V TJ = 25°C 2.2 1.4 V
–40°C < TJ < 125°C 2.4
VIL VOUT = Nominal output voltage TJ = 25°C 1.2 1 V
–40°C < TJ < 125°C 0.8
IH ON/OFF pin input current ON/OFF pin = 5 V (OFF) 12 30 μA
IIL ON/OFF pin = 0 V (ON) 0 10 μA
(1) All limits specified at room temperature TYP and MAX. All room temperature limits are 100% production tested. All limits at temperature extremes are specified through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level.
(2) The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2% (see Figure 6).
(3) Output pin sourcing current. No diode, inductor or capacitor connected to output pin.
(4) Feedback pin removed from output and connected to 0 V.
(5) Feedback pin removed from output and connected to 12 V for the adjustable, 3.3-V, and 5-V versions, and 25 V for the 12-V and 15-V versions, to force the output transistor OFF.
(6) VIN = 40 V (60 V for high voltage version).