JAJSBI4K March   2009  – April 2019 LM2840 , LM2841 , LM2842

PRODUCTION DATA.  

  1. 特長
  2. アプリケーション
  3. 概要
    1.     Device Images
      1.      代表的なアプリケーション回路
  4. 改訂履歴
  5. Pin Configuration and Functions
    1.     Pin Functions
  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
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous Conduction Mode
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Setting the Output Voltage
        3. 8.2.2.3 Inductor Selection
        4. 8.2.2.4 Input Capacitor
        5. 8.2.2.5 Output Capacitor
        6. 8.2.2.6 Bootstrap Capacitor
        7. 8.2.2.7 Soft-Start Components
        8. 8.2.2.8 Shutdown Operation
        9. 8.2.2.9 Schottky Diode
      3. 8.2.3 Application Curves
      4. 8.2.4 Other Application Circuits
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  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 開発サポート
        1. 11.1.2.1 WEBENCH®ツールによるカスタム設計
    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 関連リンク
    4. 11.4 ドキュメントの更新通知を受け取る方法
    5. 11.5 コミュニティ・リソース
    6. 11.6 商標
    7. 11.7 静電気放電に関する注意事項
    8. 11.8 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

Electrical Characteristics

Specifications are for TJ = 25°C unless otherwise specified. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 12 V.(1)(2)(3)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IQ Quiescent current SHDN = 0 V 16 µA
TJ = −40°C to 125°C 40
Device ON, not switching 1.3 mA
TJ = −40°C to 125°C 1.75
Device ON, no load 1.35
TJ = −40°C to 125°C 1.85
RDSON Switch ON resistance See (4) 0.9
TJ = −40°C to 125°C 1.6
ILSW Switch leakage current VIN = 42 V 0 µA
TJ = −40°C to 125°C 0.5
ICL Switch current limit LM2840(5) 525 mA
TJ = −40°C to 125°C 900
LM2841(5) 525 mA
TJ = −40°C to 125°C 900
LM2842(5) 1.15 A
TJ = −40°C to 125°C 1.7
IFB Feedback pin bias current LM284[0,1,2](6) 0.1 µA
TJ = −40°C to 125°C 1
VFB FB Pin reference voltage 0.765 V
TJ = −40°C to 125°C 0.747 0.782
tON(min) Minimum ON-time See (7) 100 ns
TJ = −40°C to 125°C 150
tOFF(min) Minimum OFF-time X option 110 ns
TJ = −40°C to 125°C 370
Y option 104 ns
TJ = −40°C to 125°C 200
fSW Switching frequency X option, VFB = 0.5 V 550 kHz
TJ = −40°C to 125°C 325 750
X option, VFB = 0 V 140
Y option, VFB = 0.5 V 1.25 MHz
TJ = −40°C to 125°C 0.95 1.5
Y option, VFB = 0 V 0.35
DMAX Maximum duty cycle X option 94%
TJ = −40°C to 125°C 88%
Y option 87%
TJ = −40°C to 125°C 81%
VUVP Undervoltage lockout thresholds On threshold 3.7 V
TJ = −40°C to 125°C 4.4
Off threshold 3.5
TJ = −40°C to 125°C 3.25
V SHDN Shutdown threshold Device ON 1 V
TJ = −40°C to 125°C 2.3
Device OFF 0.9
TJ = −40°C to 125°C 0.3
ISHDN Shutdown pin input bias current VSHDN = 2.3 V(6) 0.05 µA
TJ = −40°C to 125°C 1.5
VSHDN = 0 V 0.02
TJ = −40°C to 125°C 1.5
All limits specified at room temperature (TA = 25°C) unless otherwise noted. Room temperature limits are production tested. Limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
Typical numbers are at 25°C and represent the most likely norm.
The part numbers in this table represent both the Q1 and non-Q1 versions of the respective parts.
Includes the bond wires, RDSON from VIN pin to SW pin.
Current limit at 0% duty cycle. May be lower at higher duty cycle or input voltages below 6 V.
Bias currents flow into pin.
Minimum ON-time specified by design and simulation.