SLVSFS6A May   2021  – September 2021 TPS629210-Q1

ADVANCE INFORMATION  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  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
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Mode Selection and Device Configuration (MODE/S-CONF Pin)
      2. 8.3.2 Adjustable VO Operation (External Voltage Divider)
      3. 8.3.3 Settable VO Operation (VSET and Internal Voltage Divider)
      4. 8.3.4 Smart Enable with Precise Threshold
      5. 8.3.5 Power Good (PG)
      6. 8.3.6 Undervoltage Lockout (UVLO)
      7. 8.3.7 Current Limit and Short Circuit Protection
      8. 8.3.8 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Forced Pulse Width Modulation (PWM) Operation
      2. 8.4.2 AEE (Automatic Efficiency Enhancement)
      3. 8.4.3 Power Save Mode Operation (Auto PFM/PWM)
      4. 8.4.4 100% Duty-Cycle Operation
      5. 8.4.5 Output Discharge Function
      6. 8.4.6 Starting into a Pre-Biased Load
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 External Component Selection
        1. 9.1.1.1 Programming the Output Voltage
        2. 9.1.1.2 Inductor Selection
        3. 9.1.1.3 Capacitor Selection
          1. 9.1.1.3.1 Output Capacitor
          2. 9.1.1.3.2 Input Capacitor
        4. 9.1.1.4 Output Filter and Loop Stability
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

Mode Selection and Device Configuration (MODE/S-CONF Pin)

The MODE/S-CONF pin is an input with two functions. It can be used to customize the device behavior in two ways:

  1. Select the device mode (Forced PWM or Auto PFM/PWM operation) traditionally with a HIGH- or LOW- level.
  2. Select the device configuration (switching frequency, internal/external feedback, output discharge, and PFM/PWM mode) by connecting a single resistor to this pin.

The device interprets this pin during its start-up sequence after the internal OTP readout and before it starts switching in soft start. If the device reads a HIGH- or LOW-level, the Dynamic Mode Change is active and PFM/PWM mode can be changed during operation. If the device reads a resistor value, there is no further interpretation during operation and the device mode or other configurations cannot be changed afterwards.

GUID-CBA18C17-31C7-4E4A-9081-92DD691F7A9D-low.gif Figure 8-1 Interpretation of S-CONF and VSET Flow
Table 8-1 Smart-CONFIG Setting Table
# M ODE/S-CONF LEVEL OR RESISTOR VALUE [Ω] (1) FB/VSET PIN FSW (MHz) OUTPUT DISCHARGE MODE (AUTO OR FORCED PWM) DYNAMIC MODE CHANGE
Setting Options by Level
1 GND external FB up to 2.5(2) yes Auto PFM/PWM with AEE Active
2 HIGH (>1.8V) external FB 2.5 yes Forced PWM
Setting Options by Resistor
3 7.50 k external FB up to 2.5(2) no Auto PFM/PWM with AEE not active
4 9.31 k external FB 2.5 no Forced PWM
5 11.50 k external FB 1 yes Auto PFM/PWM
6 14.30 k external FB 1 yes Forced PWM
7 17.80 k external FB 1 no Auto PFM/PWM
8 22.10 k external FB 1 no Forced PWM
9 27.40 k VSET up to 2.5(2) yes Auto PFM/PWM with AEE
10 34.00 k VSET 2.5 yes Forced PWM
11 42.20 k VSET up to 2.5(2) no Auto PFM/PWM with AEE
12 52.30 k VSET 2.5 no Forced PWM
13 64.90 k VSET 1 yes Auto PFM/PWM
14 80.60 k VSET 1 yes Forced PWM
15 100.00 k VSET 1 no Auto PFM/PWM
16 124.00 k VSET 1 no Forced PWM
E96 Resistor Series, 1% accuracy, temperature coefficient better or equal than ±200 ppm/°C
FSW will vary based on VIN and VOUT. See Section 8.4.2 for more details.