SNVS667I February   2010  – March 2022 LMZ12010

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Support Resources
    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

Package Options

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

5 Pin Configuration and Functions

GUID-986B022F-0630-4A10-A96B-C7431B3AF6F1-low.gif Figure 5-1 11-PinNDY Package(Top View)
Table 5-1 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
AGND 3 Ground Analog ground — Reference point for all stated voltages. Must be externally connected to PGND (EP).
5
6
EN 4 Analog Enable — Input to the precision enable comparator. Rising threshold is 1.274 V (typical). Once the module is enabled, a 13-µA source current is internally activated to facilitate programmable hysteresis.
FB 7 Analog Feedback — Internally connected to the regulation amplifier and overvoltage comparator. The regulation reference point is 0.795 V at this input pin. Connect the feedback resistor divider between VOUT and AGND to set the output voltage.
NC 9 — No connect — This pin must remain floating, do not ground.
PGND — Ground Exposed pad/power ground — Electrical path for the power circuits within the module. PGND is not internally connected to AGND (pin 5, 6). Must be electrically connected to pins 5 and 6 external to the package. The exposed pad is also used to dissipate heat from the package during operation. Use 100 12-mil thermal vias from top to bottom copper for best thermal performance.
SS 8 Analog Soft-start/track input — To extend the 1.6-ms internal soft start, connect an external soft-start capacitor. For tracking, connect to an external resistive divider to a higher priority supply rail. See Section 8.2.2.
VIN 1 Power Input supply — Nominal operating range is 6 V to 20 V. A small amount of internal capacitance is contained within the package assembly. Additional external input capacitance is required between this pin and the exposed pad (PGND).
2
VOUT 10 Power Output voltage — Output from the internal inductor. Connect the output capacitor between this pin and exposed pad (PGND).
11