JAJSJD9R july   2004  – july 2023 LP2985 , LP2985A

PRODUCTION DATA  

  1.   1
  2. 特長
  3. アプリケーション
  4. 概要
  5. Revision History
  6. Pin Configuration and Functions
  7. 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
  8. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Enable
      2. 7.3.2 Dropout Voltage
      3. 7.3.3 Current Limit
      4. 7.3.4 Undervoltage Lockout (UVLO)
      5. 7.3.5 Output Pulldown
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Functional Mode Comparison
      2. 7.4.2 Normal Operation
      3. 7.4.3 Dropout Operation
      4. 7.4.4 Disabled
  9. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Recommended Capacitor Types
      2. 8.1.2 Input and Output Capacitor Requirements
      3. 8.1.3 Noise Bypass Capacitor (CBYPASS)
      4. 8.1.4 Reverse Current
      5. 8.1.5 Power Dissipation (PD)
      6. 8.1.6 Estimating Junction Temperature
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 ON/OFF Operation
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. Device and Documentation Support
    1. 9.1 Device Nomenclature
    2. 9.2 ドキュメントの更新通知を受け取る方法
    3. 9.3 サポート・リソース
    4. 9.4 Trademarks
    5. 9.5 静電気放電に関する注意事項
    6. 9.6 用語集
  11. 10Mechanical, Packaging, and Orderable Information

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

Typical Characteristics

at operating temperature TJ = 25°C, VIN = VOUT(NOM) + 1.0 V or 2.5 V (whichever is greater), IOUT = 1 mA, ON/OFF pin tied to VIN, CIN = 1.0 µF, and COUT = 4.7 µF (unless otherwise noted)

GUID-1CCFD1C0-21F1-4A02-A354-65AAF62088B0-low.gif
 
Figure 6-1 Output Voltage vs Temperature for Legacy Chip
GUID-20221125-SS0I-V7CG-3N77-FMKD5N401KFF-low.svg
VIN = 4.3 V, VOUT = 3.3 V (for new chip)
Figure 6-3 Output Voltage vs Temperature for New Chip
GUID-20221126-SS0I-4BSG-L367-B0D45NSQJ68L-low.svg
 
Figure 6-5 Dropout Voltage vs Temperature for New Chip
GUID-20221126-SS0I-WJHT-TXML-Q9BW6Q5DTHWS-low.svg
 
Figure 6-7 Output Regulation vs Load Current for New Chip
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Figure 6-9 Short-Circuit Current vs Time for Legacy Chip
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Figure 6-11 Short-Circuit Current vs Time for Legacy Chip
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Figure 6-13 Short-Circuit Current vs Output Voltage for Legacy Chip
GUID-20221126-SS0I-D820-S6Z4-DKKC7HPRN8K4-low.svg
 
Figure 6-15 Short-Circuit Current vs Temperature for New Chip
GUID-20221126-SS0I-FVHH-QSLZ-6WP6ZDC6RPTB-low.svg
 
Figure 6-17 Ground Pin Current vs Load Current for New Chip
GUID-20221126-SS0I-92WH-TNLQ-ZF7BGM3WDHHH-low.svg
VIN = 5 V, VOUT = 3.3 V, COUT = 10 μF, CBYP = 0 nF
Figure 6-19 Ripple Rejection vs Frequency for New Chip
GUID-20221126-SS0I-41G1-KJ1W-WRGW0WBDW7J8-low.svg
VIN = 3.7 V, VOUT = 3.3 V, COUT = 10 μF, CBYP = 0 nF
Figure 6-21 Ripple Rejection vs Frequency for New Chip
GUID-20221126-SS0I-9NC1-7LJF-CPVZFCHRWNRX-low.svg
 
Figure 6-23 Ripple Rejection vs Frequency for New Chip
GUID-20221126-SS0I-G7LG-NLL6-SKHMLDKFPMD4-low.svg
 
Figure 6-25 Ripple Rejection vs Frequency for New Chip
GUID-8DC41013-B65C-4BCE-9CDE-F81B378B0C88-low.gif
 
Figure 6-27 Output Impedance vs Frequency for Legacy Chip
GUID-20221126-SS0I-DHND-VZKK-4DSKNFCL9B69-low.svg
 
Figure 6-29 Output Noise Density vs Frequency for New Chip
GUID-20221126-SS0I-4DF8-RKVQ-TWSFDT7GMRLZ-low.svg
 
Figure 6-31 Output Noise Density vs Frequency for New Chip
GUID-20221126-SS0I-RGCX-LHB6-SLG65B22MSJC-low.svg
 
Figure 6-33 Input Current vs Input Voltage for New Chip
GUID-20221126-SS0I-PDBZ-BRJW-LGFRGKNFVKLB-low.svg
 
Figure 6-35 Ground-Pin Current vs Temperature for New Chip
GUID-EC9FDA6F-914F-4F6F-88A2-BA034EA6C245-low.png
 
Figure 6-37 4.7-μF Stable ESR Range for Output Voltage ≤ 2.3 V for Legacy Chip
GUID-D2EF57E9-B826-4892-9819-B9D1E6A891CC-low.gif
 
Figure 6-2 Output Voltage vs Temperature for Legacy Chip
GUID-DA64BF01-37F5-4DCD-9B00-CBE0F58F1BBA-low.gif
 
Figure 6-4 Dropout Voltage vs Temperature for Legacy Chip
GUID-20221126-SS0I-RPF5-RQPV-XKMWCB2HJZ3S-low.svg
 
Figure 6-6 Dropout Voltage vs Load Current for New Chip
GUID-20221126-SS0I-ZN8R-RKSQ-B7K9WDXQNGWZ-low.svg
 
Figure 6-8 Output Regulation vs Input Voltage for New Chip
GUID-20221126-SS0I-9GNW-BTGQ-RXPQL55DMNVN-low.svg
VIN = 6 V
Figure 6-10 Short-Circuit Current vs Time for New Chip
GUID-20221126-SS0I-G3GN-FJ9B-SX3GLPWKFP4B-low.svg
 
Figure 6-12 Short-Circuit Current vs Time for New Chip
GUID-20221126-SS0I-FLNQ-FPBB-JBNSFTBXGNSS-low.svg
 
Figure 6-14 Short-Circuit Current vs Output Voltage for New Chip
GUID-19323093-AC69-4375-9FBA-74EA0970AF7F-low.gif
 
Figure 6-16 Ground Pin Current vs Load Current for Legacy Chip
GUID-4FDE852C-9913-4B56-BACC-6CBBB7035196-low.gif
 
Figure 6-18 Ripple Rejection vs Frequency for Legacy Chip
GUID-C433EDD0-8F9A-4ED7-A524-2646F8B31213-low.gif
 
Figure 6-20 Ripple Rejection vs Frequency for Legacy Chip
GUID-49054EAD-2914-4A71-A86C-4CA75911291D-low.gif
 
Figure 6-22 Ripple Rejection vs Frequency for Legacy Chip
GUID-8762AA2B-7F3D-4E17-9B2D-AE4ADFECB839-low.gif
 
Figure 6-24 Ripple Rejection vs Frequency for Legacy Chip
GUID-FDF72BE3-FC1F-46FF-AB44-3F0CCE1B530F-low.gif
 
Figure 6-26 Output Impedance vs Frequency for Legacy Chip
GUID-22CCF3E4-7AC7-4519-8459-13DB455876D5-low.gif
 
Figure 6-28 Output Noise Density vs Frequency for Legacy Chip
GUID-5B6B3167-D345-4ED3-B067-752AB4C78D39-low.gif
 
Figure 6-30 Output Noise Density vs Frequency for Legacy Chip
GUID-1EC367ED-2AE1-4254-9873-83D3970D4F3C-low.gif
 
Figure 6-32 Input Current vs Input Voltage for Legacy Chip
GUID-853272D4-E820-4859-AD7E-1567F42827F2-low.gif
 
Figure 6-34 Ground-Pin Current vs Temperature for Legacy Chip
GUID-E408246C-A7F9-4F01-BB95-CE7BF1B31D06-low.png
 
Figure 6-36 2.2-μF Stable ESR Range for Output Voltage ≤ 2.3 V for Legacy Chip
GUID-13EEC58C-4D03-427D-B943-D4E3A36F3AAF-low.png
 
Figure 6-38 2.2-μF, 3.3-μF Stable ESR Range for Output Voltage ≥ 2.5 V for Legacy Chip