SLVSGB4B October   2021  – April 2022 TPSM63606

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 System Characteristics
    7. 7.7 Typical Characteristics
    8. 7.8 Typical Characteristics (VIN = 12 V)
    9. 7.9 Typical Characteristics (VIN = 24 V)
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Input Voltage Range (VIN1, VIN2)
      2. 8.3.2  Adjustable Output Voltage (FB)
      3. 8.3.3  Input Capacitors
      4. 8.3.4  Output Capacitors
      5. 8.3.5  Switching Frequency (RT)
      6. 8.3.6  Precision Enable and Input Voltage UVLO (EN/SYNC)
      7. 8.3.7  Frequency Synchronization (EN/SYNC)
      8. 8.3.8  Spread Spectrum
      9. 8.3.9  Power Good Monitor (PG)
      10. 8.3.10 Adjustable Switch-Node Slew Rate (RBOOT, CBOOT)
      11. 8.3.11 Bias Supply Regulator (VCC, VLDOIN)
      12. 8.3.12 Overcurrent Protection (OCP)
      13. 8.3.13 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Active Mode
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design 1 – High-Efficiency 6-A Synchronous Buck Regulator for Industrial Applications
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 9.2.1.2.2 Output Voltage Setpoint
          3. 9.2.1.2.3 Switching Frequency Selection
          4. 9.2.1.2.4 Input Capacitor Selection
          5. 9.2.1.2.5 Output Capacitor Selection
          6. 9.2.1.2.6 Other Connections
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Design 2 – Inverting Buck-Boost Regulator with Negative Output Voltage
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Output Voltage Setpoint
          2. 9.2.2.2.2 IBB Maximum Output Current
          3. 9.2.2.2.3 Switching Frequency Selection
          4. 9.2.2.2.4 Input Capacitor Selection
          5. 9.2.2.2.5 Output Capacitor Selection
          6. 9.2.2.2.6 Other Considerations
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Thermal Design and Layout
    2. 11.2 Layout Example
      1. 11.2.1 Package Specifications
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 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

Figure 6-1 20-Pin QFNRDL Package(Top View)
Table 6-1 Pin Functions
Pin Type(1) Description
Name NO.
VIN1, VIN2 1, 16 P Input supply voltage. Connect the input supply to these pins. Connect input capacitors between these pins and PGND in close proximity to the device.
SW 2 O Switch node. Do not place any external component on this pin or connect to any signal. The amount of copper placed on this pin must be kept to a minimum to prevent issues with noise and EMI.
CBOOT 3 I/O Bootstrap pin for the internal high-side gate driver. A 100-nF bootstrap capacitor is internally connected from this pin to SW within the module to provide the bootstrap voltage. CBOOT is brought out to use in conjunction with RBOOT to effectively lower the value of the internal series bootstrap resistance to adjust the switch-node slew rate, if necessary.
RBOOT 4 I/O External bootstrap resistor connection. Internal to the device, a 100-Ω bootstrap resistor is connected between RBOOT and CBOOT. RBOOT is brought out to use in conjunction with CBOOT to effectively lower the value of the internal series bootstrap resistance to adjust the switch-node slew rate, if necessary.
VLDOIN 5 P Input bias voltage. Input to the internal LDO that supplies the internal control circuits. Connect to an output voltage point to improve efficiency. Connect an optional high-quality 0.1-μF to 1-μF capacitor from this pin to ground for improved noise immunity. If the output voltage is above 12 V, connect this pin to ground.
AGND 6, 11 G Analog ground. Zero-voltage reference for internal references and logic. All electrical parameters are measured with respect to this pin. These pins must be connected to PGND. See Section 11.2 for a recommended layout.
VCC 7 O Internal LDO output. Used as a supply to the internal control circuits. Do not connect to any external loads. A 1-μF capacitor internally connects from VCC to AGND.
VOUT1, VOUT2 8, 9 P Output voltage. These pins are connected to the internal buck inductor. Connect these pins to the output load and connect external output capacitors between these pins and PGND.
FB 10 I Feedback input. Connect the midpoint of the feedback resistor divider to this pin. Connect the upper resistor (RFBT) of the feedback divider to VOUT at the desired point of regulation. Connect the lower resistor (RFBB) of the feedback divider to AGND. Do not leave open or connect to ground.
RT 12 I Frequency setting pin used to set the switching frequency between 200 kHz and 2.2 MHz by placing an external resistor from RT to AGND. Do not leave open or connect to ground.
PG 13 O Open-drain power-good monitor output that asserts low if the FB voltage is not within the specified window thresholds. A 10-kΩ to 100-kΩ pullup resistor to a suitable voltage is required. If not used, PG can be left open or connected to GND.
EN/SYNC 14 I Precision enable input pin. High = on, Low = off. Can be connected to VIN. Precision enable allows the pin to be used as an adjustable input voltage UVLO. It also functions as the synchronization input pin. Used to synchronize the device switching frequency to a system clock. Triggers on the rising edge of an external clock. A capacitor can be used to AC couple the synchronization signal to this pin. The module can be turned off by using an open-drain/collector device to connect this pin to AGND. Connect an external resistor divider between this pin, VIN and AGND to create an external UVLO.
NC 15 — No connection. Tie to GND or leave open.
PGND 17, 18, 19, 20 G Power ground. This is the return current path for the power stage of the device. Connect these pads to the input supply return, the load return, and the capacitors associated with the VIN and VOUT pins. See Section 11.2 for a recommended layout.
(1) P = Power, G = Ground, I = Input, O = Output