SLTS278J November   2010  – March 2020 PTH08T250W

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1. Table 1. Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Electrical Characteristics
    3. 7.3 Typical Characteristics (VI = 12 V)
    4. 7.4 Typical Characteristics (VI = 5 V)
  8. 8 Detailed Description
    1. 8.1 Overview: TurboTrans™ Technology
    2. 8.2 Feature Description
      1. 8.2.1 Soft-Start Power-Up
      2. 8.2.2 Differential Output Voltage Remote Sense
      3. 8.2.3 Overcurrent Protection
      4. 8.2.4 Overtemperature Protection (OTP)
  9. 9 Application and Implementation
    1. 9.1 Typical Application
      1. 9.1.1 Detailed Design Procedure
        1. 9.1.1.1  Adjusting the Output Voltage
        2. 9.1.1.2  Capacitor Recommendations for the PTH08T250W Power Module
          1. 9.1.1.2.1 Capacitor Technologies
          2. 9.1.1.2.2 Input Capacitor (Required)
          3. 9.1.1.2.3 Input Capacitor Information
          4. 9.1.1.2.4 Output Capacitor (Required)
          5. 9.1.1.2.5 Output Capacitor Information
          6. 9.1.1.2.6 TurboTrans Output Capacitance
          7. 9.1.1.2.7 Non-TurboTrans Output Capacitance
          8. 9.1.1.2.8 Designing for Fast Load Transients
          9. 9.1.1.2.9 Capacitor Table
        3. 9.1.1.3  TurboTrans™ Technology
        4. 9.1.1.4  TurboTrans™ Selection
          1. 9.1.1.4.1 PTH08T250W Type B Capacitors
            1. 9.1.1.4.1.1 RTT Resistor Selection
          2. 9.1.1.4.2 PTH08T250W Type C Capacitors
            1. 9.1.1.4.2.1 RTT Resistor Selection
        5. 9.1.1.5  Undervoltage Lockout (UVLO)
          1. 9.1.1.5.1 UVLO Adjustment
        6. 9.1.1.6  On/Off Inhibit
        7. 9.1.1.7  Current Sharing
          1. 9.1.1.7.1 Current Sharing and TurboTrans
            1. 9.1.1.7.1.1 Current Sharing Thermal Derating Curves
            2. 9.1.1.7.1.2 Current Sharing Layout
        8. 9.1.1.8  Prebias Startup Capability
        9. 9.1.1.9  SmartSync Technology
        10. 9.1.1.10 Auto-Track™ Function
          1. 9.1.1.10.1 How Auto-Track™ Works
          2. 9.1.1.10.2 Typical Auto-Track Application
          3. 9.1.1.10.3 Notes on Use of Auto-Track™
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape, Reel, and Tray Drawings

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • BCU|22
  • ECT|22
  • ECU|22
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.1.1.7 Current Sharing

The PTH08T250W module is capable of being configured in parallel with another PTH08T250W module to share load current. To parallel the two modules, it is necessary to configure one module as the Master and one module as the Slave. To configure a module as the Master, connect the CONFIG pin (pin 1) to GND. The CONFIG pin of the Slave must be connected to VI. In order to share current, pins 2 thru 5 of both the Master and Slave must be connected between the two modules. See Figure 27 for the recommended layout of pins 2 thru 5. The module that is configured as the MASTER is used to control all of the functions of the two modules including Inhibit ON/OFF control, AutoTrack sequencing, TurboTrans, SmartSync, +/- Remote Sense, and Output Voltage Adjust. See the current sharing diagram in Figure 22 for connections. The MASTER and the SLAVE must be powered from the same input voltage supply.

See Figure 22 and Table 8 for a diagram and connection description of each pin when two PTH08T250W modules are being used in a MASTER/SLAVE configuration.

Refer to the application article SLYT320 for more information regarding current sharing PTH08T250W modules.

PTH08T250W v07050_lts278.gifFigure 22. Typical Current Sharing Diagram

Table 8. Required Connections for Current Sharing(1)

PIN MASTER SLAVE
NAME NO.
VI 6,7,14,15 Connect to the Input Bus. Connect to the Input Bus.
VO 10,11 Connect to the Output Bus. Connect to the Output Bus.
GND 8,9,12,13 Connect to Common Power GND. Connect to Common Power GND.
Inhibit and UVLO 21 Use for Inhibit control & UVLO adjustments. If unused leave open-circuit. No Connection. Leave open-circuit.
Vo Adjust 18 Use to set the output voltage. Connect RSET resistor between this pin and AGND (pin 4). No Connection. Leave open-circuit.
+Sense 17 Connect to the output voltage either at the load or at the module (pin 11). No Connection. Leave open-circuit.
–Sense 16 Connect to the output GND either at the load or at the module (pin 13). No Connection. Leave open-circuit.
Track 20 Connect to Track control or to VI (pin 15). No Connection. Leave open-circuit.
TurboTrans™ 19 Connect TurboTrans resistor, RTT, between this pin and +Sense (pin 17). No Connection. Leave open-circuit.
SmartSync 22 Connect to an external clock. If unused connect to GND. Connect to Common Power GND.
CONFIG 1 Connect to GND. (2) Connect to the Input Bus.
Share 2 Connect to pin 2 of Slave. (2) Connect to pin 2 of Master.
Comp 3 Connect to pin 3 of Slave. (2) Connect to pin 3 of Master.
AGND 4 Connect to pin 4 of Slave. (3) Connect to pin 4 of Master.
CLKIO 5 Connect to pin 5 of Slave. (2) Connect to pin 5 of Master.
(1) For more details on the pin descriptions, refer the Pin Functions table.
(2) See Layer A in Figure 27 for recommended layout
(3) See Layer B in Figure 27 for recommended layout