SLVS941G April   2009  – August 2016 TPS62230

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 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 Undervoltage Lockout
      2. 8.3.2 Enable and Shutdown
      3. 8.3.3 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Soft-Start
      2. 8.4.2 Power-Save Mode
      3. 8.4.3 Forced PWM Mode
      4. 8.4.4 100% Duty Cycle Low Dropout Operation
      5. 8.4.5 Short Circuit Protection
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Filter Design (Inductor and Output Capacitor)
        2. 9.2.2.2 Inductor Selection
        3. 9.2.2.3 Output Capacitor Selection
        4. 9.2.2.4 Input Capacitor Selection
        5. 9.2.2.5 Checking Loop Stability
      3. 9.2.3 Application Curves
        1. 9.2.3.1  VOUT = 1.1 V - TPS622311
        2. 9.2.3.2  VOUT = 1.2 V - TPS62232/TPS62235
        3. 9.2.3.3  VOUT = 1.8 V - TPS62231
        4. 9.2.3.4  VOUT = 1.85 V - TPS62236
        5. 9.2.3.5  VOUT = 2.5 V - TPS62230
        6. 9.2.3.6  VOUT = 3.0 V - TPS62233
        7. 9.2.3.7  Start-Up
        8. 9.2.3.8  PFM / PWM Operation
        9. 9.2.3.9  Peak-to-Peak Output Ripple Voltage
        10. 9.2.3.10 Power-Supply Rejection
        11. 9.2.3.11 Spurious Output Noise
        12. 9.2.3.12 Line Transient Response
        13. 9.2.3.13 Mode Transition
        14. 9.2.3.14 AC-Load Regulation
        15. 9.2.3.15 Load Transient Response
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

11 Layout

11.1 Layout Guidelines

As for all switching power supplies, the layout is an important step in the design. Proper function of the device demands careful attention to PCB layout. Take care in the board layout to get the specified performance. If the layout is not carefully done, the regulator could show poor line and/or load regulation, stability issues, as well as EMI problems. It is critical to provide a low-inductance, impedance ground path. Therefore, use wide and short traces for the main current paths. The input capacitor must be placed as close as possible to the IC pins as well as the inductor and output capacitor.

Use a common power GND node and a different node for the signal GND to minimize the effects of ground noise. Keep the common path to the GND pin, which returns the small signal components and the high current of the output capacitors as short as possible to avoid ground noise. The FB line must be connected to the output capacitor and routed away from noisy components and traces (for example, SW line).

11.2 Layout Example

TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237 TPS62238 TPS62239 TPS622310 TPS622311 TPS622312 TPS622313 TPS622314 TPS622315 TPS622316 TPS622317 TPS622318 TPS622319 pcb_lay_lvs941.gif Figure 55. Recommended PCB Layout for TPS6223x