JAJSB26I February   2010  – March 2022 LMZ12010

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Pin Configuration and 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
    6. 6.6 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 Output Overvoltage Protection
      2. 7.3.2 Current Limit
      3. 7.3.3 Thermal Protection
      4. 7.3.4 Prebiased Start-Up
    4. 7.4 Device Functional Modes
      1. 7.4.1 Discontinuous Conduction and Continuous Conduction Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Enable Divider, RENT, RENB, and RENH Selection
        2. 8.2.2.2 Output Voltage Selection
        3. 8.2.2.3 Soft-Start Capacitor Selection
        4. 8.2.2.4 Tracking Supply Divider Option
        5. 8.2.2.5 COUT Selection
        6. 8.2.2.6 CIN Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Power Dissipation and Thermal Considerations
    4. 10.4 Power Module SMT Guidelines
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 サポート・リソース
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, 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

8.2.2.2 Output Voltage Selection

Output voltage is determined by a divider of two resistors connected between VOUT and AGND. The midpoint of the divider is connected to the FB input.

The regulated output voltage determined by the external divider resistors, RFBT and RFBB, is:

Equation 6. VOUT = 0.795 V × (1 + RFBT / RFBB)

Rearranging terms, the ratio of the feedback resistors for a desired output voltage is:

Equation 7. RFBT / RFBB = (VOUT / 0.795 V) – 1

These resistors must generally be chosen from values in the range of 1.0 kΩ to 10.0 kΩ.

For VOUT = 0.8 V, the FB pin can be connected to the output directly and RFBB can be set to 8.06 kΩ to provide minimum output load.

Table 8-1 lists the values for RFBT , and RFBB.

Table 8-1 Typical Application Bill of Materials
Ref DesDescriptionCase SizeManufacturerManufacturer P/N
U1SIMPLE SWITCHERPFM-11Texas InstrumentsLMZ12010TZ
CIN1,6 (OPT)0.047 µF, 50 V, X7R1206Yageo AmericaCC1206KRX7R9BB473
CIN2,3,410 µF, 50 V, X7R1210Taiyo YudenUMK325BJ106MM-T
CIN5 (OPT)CAP, AL, 150 µF, 50 VRadial GPanasonicEEE-FK1H151P
CO1,5 (OPT)0.047 µF, 50 V, X7R1206Yageo AmericaCC1206KRX7R9BB473
CO2 (OPT)47 µF, 10 V, X7R1210MurataGRM32ER61A476KE20L
CO3,4330 μF, 6.3 V, 0.015 ΩCAPSMT_6_UEKemetT520D337M006ATE015
RFBT3.32 kΩ0805PanasonicERJ-6ENF3321V
RFBB1.07 kΩ0805PanasonicERJ-6ENF1071V
RENT42.2 kΩ0805PanasonicERJ-6ENF4222V
RENB12.7 kΩ0805PanasonicERJ-6ENF1272V
CSS0.47 μF, ±10%, X7R, 16 V0805AVX0805YC474KAT2A
D1 (OPT)5.1 V, 0.5 WSOD-123Diodes Inc.MMSZ5231BS-7-F