SLUSFA6 October   2023 UCC44273

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  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
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching 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 VDD and Undervoltage Lockout
      2. 7.3.2 Operating Supply Current
      3. 7.3.3 Input Stage
      4. 7.3.4 Output Stage
      5. 7.3.5 Low Propagation Delays
    4. 7.4 Device Functional Modes
  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 Input Threshold Type
        2. 8.2.2.2 VDD Bias Supply Voltage
        3. 8.2.2.3 Peak Source and Sink Currents
        4. 8.2.2.4 Propagation Delay
      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
      3. 8.4.3 Thermal Considerations
      4. 8.4.4 Power Dissipation
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

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7.1 Overview

The UCC44273 single-channel, high-speed, low-side gate-driver device is capable of effectively driving MOSFET and IGBT power switches. Using a design that inherently minimizes shoot-through current, the UCC44273 device is capable of sourcing and sinking high peak-current pulses into capacitive loads offering rail-to-rail drive capability and extremely small propagation delay of 13 ns (typical). The UCC44273 provides 4-A source, 4-A sink (symmetrical drive) peak-drive current capability. The device is designed to operate over a wide VDD range of 4.5 to 18 V, and a wide temperature range of –40°C to 140°C. Internal undervoltage lockout (UVLO) circuitry on the VDD pin holds the output low outside VDD operating range. The capability to operate at low voltage levels, such as below 5 V, along with best-in- class switching characteristics, is especially suited for driving emerging wide bandgap power-switching devices such as GaN power-semiconductor devices.

The input pin threshold of the UCC44273 device is based on TTL and CMOS-compatible low-voltage logic which is fixed and independent of the VDD supply voltage. Wide hysteresis between the high and low thresholds offers excellent noise immunity.

Table 7-1 UCC44273 Summary
PART NUMBERPACKAGEPEAK CURRENT (SOURCE, SINK)INPUT THRESHOLD LOGIC
UCC44273SOT-23, 5 pin4-A, 4-A
(Symmetrical Drive)		CMOS and TTL-Compatible
(low voltage, independent of VDD bias voltage)
Table 7-2 UCC44273 Features and Benefits
FEATUREBENEFIT
High Source, Sink Current Capability 4 A, 4 A (Symmetrical)High current capability offers flexibility in employing the UCC44273 to drive a variety of power switching devices at varying speeds
Best-in-class 13-ns (typ) Propagation delayExtremely low-pulse transmission distortion
Expanded VDD Operating range of 4.5 V to 18 VFlexibility in system design
Low VDD operation ensures compatibility with emerging wide-bandgap power devices such as GaN
Expanded Operating Temperature range of –40°C to 140°C
(See Recommended Operating Conditions table)
VDD UVLO ProtectionOutputs are held low in UVLO condition, which ensures predictable glitch-free operation at power up and power down
Output held low when input pin (IN) in floating conditionProtection feature, especially useful in passing abnormal condition tests during protection certification
Ability of input pin to handle voltage levels not restricted by VDD pin bias voltageSystem simplification, especially related to auxiliary bias supply architecture
CMOS and TTL compatible input threshold logic with wide hysteresis in UCC44273Enhanced noise immunity, while retaining compatibility with microcontroller logic-level input signals (3.3 V, 5 V) optimized for digital power
Ability to handle –5 VDC at input pinsIncreased robustness in noisy environments