SLVS681F June   2006  – August 2014 TPS62400 , TPS62401 , TPS62402 , TPS62403 , TPS62404


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Options
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Converter 1
      2. 8.3.2 Converter 2
      3. 8.3.3 DEF_1 Pin Function
      4. 8.3.4 Mode Selection
      5. 8.3.5 Enable
      6. 8.3.6 Soft Start
      7. 8.3.7 Short-Circuit Protection
      8. 8.3.8 Under-Voltage Lockout
      9. 8.3.9 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Save Mode
      2. 8.4.2 Dynamic Voltage Positioning
      3. 8.4.3 100% Duty Cycle Low Dropout Operation
      4. 8.4.4 180° Out-Of-Phase Operation
    5. 8.5 Programming
      1. 8.5.1 EasyScale: One-Pin Serial Interface for Dynamic Output Voltage Adjustment
        1. General
        2. Protocol
        3. Addressable Registers
          1. Bit Decoding
          2. Acknowledge
          3. MODE Selection
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TPS6240x, Dual Outputs Step Down Converter
        1. Design Requirements
        2. Detailed Design Procedure
          1. Converter1 Adjustable Default Output Voltage Setting: TPS62400
          2. Converter1 Fixed Default Output Voltage Setting (TPS62401, TPS62402, TPS62403, TPS62404).
          3. Converter 2 Adjustable Default Output Voltage Setting TPS62400:
          4. Converter 2 Fixed Default Output Voltage Setting
          5. Output Filter Design (Inductor and Output Capacitor)
            1. Inductor Selection
            2. Output Capacitor Selection
            3. Input Capacitor Selection
        3. Application Curves
      2. 9.2.2 Various Output Voltages
        1. Design Requirements
        2. Detailed Design Procedure
      3. 9.2.3 Dynamic Voltage Scaling on Converter 1 by DEF_1 Pin
        1. Design Requirements
        2. Detailed Design Procedure
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

6 Pin Configuration and Functions

DRC Package
10 Pins
Top View

Pin Functions

ADJ2 1 I Input to adjust output voltage of converter 2. In adjustable version (TPS62400) connect a external resistor divider between VOUT2, this pin and GND to set output voltage between 0.6V and VIN. At fixed output voltage version (TPS62401, TPS62402, TPS62403, TPS62404) this pin MUST be directly connected to the output. If EasyScale Interface is used for converter 2, this pin must be directly connected to the output, too.
DEF_1 5 I This pin defines the output voltage of converter 1. The pin acts either as analog input for output voltage setting via external resistors (TPS62400), or digital input to select between two fixed default output voltages (TPS62401, TPS62402, TPS62403, TPS62404).
For the TPS62400, an external resistor network needs to be connected to this pin to adjust the default output voltage.
Using the fixed output voltage device options this pin selects between two fixed default output voltages, see table ordering information
EN1 7 I Enable Input for Converter1, active high
EN2 9 I Enable Input for Converter 2, active high
FB1 4 I Direct feedback voltage sense input of converter 1, connect directly to Vout 1. An internal feed forward capacitor is connected between this pin and the error amplifier. In case of fixed output voltage versions or when the Interface is used, this pin is connected to an internal resistor divider network.
GND 8 GND for both converters; connect this pin to the PowerPAD™
MODE/DATA 2 I/O This Pin has 2 functions:
1. Operation Mode selection: With low level, Power Save Mode is enabled where the device operates in PFM mode at light loads and enters automatically PWM mode at heavy loads. Pulling this PIN to high forces the device to operate in PWM mode over the whole load range.
2. EasyScale™ Interface function: One wire serial interface to change the output voltage of both converters. The pin has an open drain output to provide an acknowledge condition if requested. The current into the open drain output stage may not exceed 500μA. The interface is active if either EN1 or EN2 is high.
PowerPAD™ Connect to GND
SW1 6 I/O Switch Pin of Converter 1. Connect to Inductor
SW2 10 I/O Switch Pin of Converter 2. Connect to Inductor.
VIN 3 Supply voltage, connect to VBAT, 2.5V to 6V