SNVS641L January   2010  – April 2019 LMZ10503

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Circuit
      2.      Efficiency VOUT = 3.3 V
  4. 4 Revision History
  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
    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 Enable
      2. 7.3.2 Enable and UVLO
      3. 7.3.3 Soft-Start
      4. 7.3.4 Soft-Start Capacitor
      5. 7.3.5 Tracking
      6. 7.3.6 Tracking - Equal Soft-Start Time
      7. 7.3.7 Tracking - Equal Slew Rates
      8. 7.3.8 Current Limit
      9. 7.3.9 Overtemperature Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Prebias Start-Up Capability
  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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Input Capacitor Selection
        3. 8.2.2.3 Output Capacitor Selection
          1. 8.2.2.3.1 Output Voltage Setting
        4. 8.2.2.4 Loop Compensation
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
      1. 8.3.1 Application Schematic for 3.3-V to 5-V Input and 2.5-V Output With Optimized Ripple and Transient Response
      2. 8.3.2 Application Schematic for 3.3-V to 5-V Input and 2.5-V Output
      3. 8.3.3 EMI Tested Schematic for 2.5-V Output Based on 3.3-V to 5-V Input
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Estimate 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
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.1 Design Requirements

For this example the following application parameters exist.

  • VIN = 5 V
  • VOUT = 2.5 V
  • IOUT = 3 A
  • ΔVOUT = 20 mVpk-pk
  • ΔVo_tran = ±20 mVpk-pk

Table 1. Bill of Materials, VIN = 3.3 V to 5 V, VOUT = 2.5 V, IOUT (MAX) = 3 A, Optimized for Electrolytic Input and Output Capacitance

DESIGNATOR DESCRIPTION CASE SIZE MANUFACTURER MANUFACTURER P/N QUANTITY
U1 Power Module PFM-7 Texas Instruments LMZ10503 1
Cin1 150 µF, 6.3 V, 18 mΩ C2, 6.0 x 3.2 x 1.8 mm Sanyo 6TPE150MIC2 1
CO1 330 µF, 6.3 V, 18 mΩ D3L, 7.3 x 4.3 x 2.8 mm Sanyo 6TPE330MIL 1
Rfbt 100 kΩ 0603 Vishay Dale CRCW0603100KFKEA 1
Rfbb 47.5 kΩ 0603 Vishay Dale CRCW060347K5FKEA 1
Rcomp 15 kΩ 0603 Vishay Dale CRCW060315K0FKEA 1
Ccomp 330 pF, ±5%, C0G, 50 V 0603 TDK C1608C0G1H331J 1
CSS 10 nF, ±10%, X7R, 16 V 0603 Murata GRM188R71C103KA01 1

Table 2. Bill of Materials, VIN = 3.3 V, VOUT = 0.8 V, IOUT (MAX) = 3 A, Optimized for Solution Size and Transient Response

DESIGNATOR DESCRIPTION CASE SIZE MANUFACTURER MANUFACTURER P/N QUANTITY
U1 Power Module PFM-7 Texas Instruments LMZ10503TZ 1
Cin1, CO1 47 µF, X5R, 6.3 V 1206 TDK C3216X5R0J476M 2
Rfbt 110 kΩ 0402 Vishay Dale CRCW0402100KFKED 1
Rcomp 1.0 kΩ 0402 Vishay Dale CRCW04021K00FKED 1
Ccomp 27 pF, ±5%, C0G, 50 V 0402 Murata GRM1555C1H270JZ01 1
CSS 10 nF, ±10%, X7R, 16 V 0402 Murata GRM155R71C103KA01 1