SLVSGM1B July   2023  – June 2024 TPSM828301 , TPSM828302 , TPSM828303

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information RDS Package
    5. 6.5 Thermal Information VCB Package
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pulse Width Modulation (PWM) Operation
      2. 7.3.2 Power Save Mode (PSM) Operation
      3. 7.3.3 Start-Up and Soft Start
      4. 7.3.4 Switch Cycle-by-Cycle Current Limit
      5. 7.3.5 Undervoltage Lockout
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Optimized EMI Performance
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable, Disable, and Output Discharge
      2. 7.4.2 Minimum Duty Cycle and 100% Mode Operation
      3. 7.4.3 Power Good
  9. 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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Setting The Output Voltage
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Output Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Considerations
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5 Pin Configuration and Functions

TPSM828301 TPSM828302 TPSM828303 RDS Package, 9-Pin QFN-FCMOD Top View Figure 5-1 RDS Package, 9-Pin QFN-FCMOD Top View
Table 5-1 Pin Functions: RDS Package
PIN TYPE DESCRIPTION
NAME NO.
VIN 1

PWR

 Input voltage pin. Connect the input capacitor as close as possible between VIN and GND.
GND 2 PWR Ground pin
MODE 3 I The device runs in PSM/PWM mode when this pin pulls low and in forced-PWM mode when pulled high. This action can also be done when the device is in-operation. Do not leave this pin floating.
FB 4 I Feedback pin. Connect the resistive output voltage divider to this pin.

VOS

 5

I

 Output voltage sense pin. Connect this pin directly after the inductor.
VOUT 6

PWR

 Output voltage pin
PG

7

O

 Power good open-drain output pin. The pullup resistor can be connected to voltages up to 5.5 V. If unused, leave this pin floating.

SW

8

PWR

 Switch pin of the converter, which is connected to the internal power MOSFET and the inductor. Avoid connecting this pin to larger traces as this can increase EMI. this pin can stay unconnected or be soldered to a small pad for thermal improvement.
EN 9 I Device enable pin. To enable the device, pull this pin high. Pulling this pin low disables the device. Do not leave this pin unconnected.
TPSM828301 TPSM828302 TPSM828303 VCB Package, 10-Pin QFN-FCMOD Figure 5-2 VCB Package, 10-Pin QFN-FCMOD
Table 5-2 Pin Functions: VCB Package
PIN TYPE DESCRIPTION
NAME NO.
VIN 1

PWR

 Input voltage pin. Connect the input capacitor as close as possible between VIN and GND.
GND 2, 10 PWR Ground pins
FB 3 I Feedback pin. Connect the resistive output voltage divider to this pin.
VOUT 4

PWR

 Output voltage pin

VOS

 5

I

 Output voltage sense pin. Connect this pin directly after the inductor.
MODE 6 I The device runs in PSM/PWM mode when this pin pulls low and in forced-PWM mode when pulled high. This action can also be done when the device is in operation. Do not leave this pin floating.
PG

7

O

 Power-good open-drain output pin. The pullup resistor can be connected to voltages up to 5.5 V. If unused, leave this pin floating.

SW

8

PWR

 Switch pin of the converter, which is connected to the internal power MOSFET and the inductor. Avoid connecting this pin to larger traces as this action can increase EMI. This pin can stay unconnected or be soldered to a small pad for thermal improvement.
EN 9 I Device enable pin. To enable the device, pull this pin high. Pulling this pin low disables the device. Do not leave this pin unconnected.