SLUSFK1D January   2024  – June 2024 UCC33420

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Insulation Specifications
    6. 5.6 Safety-Related Certifications
    7. 5.7 Electrical Characteristics
    8. 5.8 External BOM Components
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Enable and Disable
      2. 6.3.2 Output Voltage Soft-Start and Steady-State Regulation
      3. 6.3.3 Protection Features
        1. 6.3.3.1 Input Under-voltage and Over-Voltage Lockout
        2. 6.3.3.2 Output Under-Voltage Protection
        3. 6.3.3.3 Output Over-Voltage Protection
        4. 6.3.3.4 Over-Temperature Protection
        5. 6.3.3.5 Fault Reporting and Auto-Restart
      4. 6.3.4 VCC Output Voltage Selection
      5. 6.3.5 VCC Load Recommended Operating Area
      6. 6.3.6 Electromagnetic Compatibility (EMC) Considerations
    4. 6.4 Device Functional Modes
    5. 6.5 Pre-Production Samples Operating Limits
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical and Packaging Information

Package Options

Mechanical Data (Package|Pins)
  • RAQ|12
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4 Pin Configuration and Functions

UCC33420 VSON-FCRLF 12-pin Package (Top View) Figure 4-1 VSON-FCRLF 12-pin Package (Top View)
Table 4-1 Pin Functions
PIN TYPE (1) DESCRIPTION
NAME NO.
EN/FLT 1 I/O

Multi-function Enable input pin and fault output pin. Connect to microcontroller through an 18kΩ or greater pull-up resistor.

Enable input pin: Forcing EN low disables the device. Pull high to enable normal device functionality.

Fault output pin: This pin is pulled low for 200μs to alert that power converter is shutdown due to fault condition
VINP 2 P Primary side input supply voltage pin. 2.2nF (CIN1) and 22μF (CIN2) ceramic bypass capacitors placed close to device pins are required between VINP and GNDP pins
GNDP 3 G Power ground return connection for VINP.
4
5
6
SEL 7 I VCC selection pin. VCC setpoint is 5.0V when SEL is connected to VCC, and 5.5V when SEL is shorted to GNDS
VCC 8 P Isolated supply output voltage pin. 2.2nF (COUT1) and 22μF (COUT2) ceramic bypass capacitors placed close to device pins are required between VCC and GNDS pins
GNDS 9 G Power ground return connection for VCC.
10
11
12
(1) P = Power, G = Ground, I = Input, O = Output