SNVS715B March   2011  – June 2019 LM21212-2

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Application Circuit
  4. 4 Revision History
  5. 5 Description, continued
  6. 6 Pin Configuration and Functions
    1.     Pin Descriptions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Ratings
    4. 7.4 Electrical Characteristics
    5. 7.5 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Precision Enable
      2. 8.3.2 UVLO
      3. 8.3.3 Current Limit
      4. 8.3.4 Short-Circuit Protection
      5. 8.3.5 Thermal Protection
      6. 8.3.6 Power-Good Flag
      7. 8.3.7 Light Load Operation
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Typical Application 1
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 9.2.1.2.2 Output Voltage
          3. 9.2.1.2.3 Precision Enable
          4. 9.2.1.2.4 Soft Start
          5. 9.2.1.2.5 Resistor-Adjustable Frequency
          6. 9.2.1.2.6 Inductor Selection
          7. 9.2.1.2.7 Output Capacitor Selection
          8. 9.2.1.2.8 Input Capacitor Selection
          9. 9.2.1.2.9 Control Loop Compensation
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Typical Application Schematic 2
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
  10. 10Layout
    1. 10.1 Layout Considerations
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.1.1 Design Requirements

Table 1. Bill Of Materials (VIN = 3.3 V - 5.5 V, VOUT = 1.2 V, IOUT = 12 A, FSW = 500 kHz)

ID DESCRIPTION VENDOR PART NUMBER QUANTITY
CF CAP, CERM, 1 uF, 10V, +/-10%, X7R, 0603 MuRata GRM188R71A105KA61D 1
CIN1, CIN2, CIN3, CO1, CO2, CO3 CAP, CERM, 100 uF, 6.3V, +/-20%, X5R, 1206 MuRata GRM31CR60J107ME39L 6
CC1 CAP, CERM, 1800 pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H182J 1
CC2 CAP, CERM, 68 pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H680J 1
CC3 CAP, CERM, 820 pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H821J 1
CSS CAP, CERM, 0.033 uF, 16V, +/-10%, X7R, 0603 MuRata GRM188R71C333KA01D 1
LO Inductor, Shielded Drum Core, Powdered Iron, 560nH, 27.5A, 0.0018 ohm, SMD Vishay-Dale IHLP4040DZERR56M01 1
RF RES, 1.0 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031R00JNEA 1
RC1 RES, 9.31 kohm, 1%, 0.1W, 0603 Vishay-Dale CRCW06039K31FKEA 1
RC2 RES, 165 ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW0603165RFKEA 1
RFB1, RFB2, RPGOOD RES, 10 kohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060310K0FKEA 3
RADJ RES, 95.3 kohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060395K3FKEA 1