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  • TPS562212 4.2-V to 18-V Input, 2-A Synchronous Buck Converter in a SOT-5X3 Package

    • SLUSEI0 October   2021 TPS562212

      PRODUCTION DATA  

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  • TPS562212 4.2-V to 18-V Input, 2-A Synchronous Buck Converter in a SOT-5X3 Package
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Advanced Emulated Current Mode Control
      2. 7.3.2 Mode Selection and PG/SS Pin Function Configuration
      3. 7.3.3 Power Good (PG)
      4. 7.3.4 Soft Start and Pre-Biased Soft Start
      5. 7.3.5 Output Discharge Through PG/SS Pin
      6. 7.3.6 Precise Enable and Adjusting Undervoltage Lockout
      7. 7.3.7 Overcurrent Limit and Undervoltage Protection
      8. 7.3.8 Overvoltage Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
      3. 7.4.3 FCCM Operation
      4. 7.4.4 CCM Operation
      5. 7.4.5 DCM Operation and Eco-mode Operation
      6. 7.4.6 On-Time Extension for Large Duty Cycle Operation
  8. 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 Output Voltage Resistors Selection
        3. 8.2.2.3 Output Inductor Selection
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 Input Capacitor Selection
        6. 8.2.2.6 Bootstrap Capacitor Selection
        7. 8.2.2.7 Undervoltage Lockout Set Point
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Third-Party Products Disclaimer
        2. 11.1.1.2 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DRL|8
    • MPCS002F
Thermal pad, mechanical data (Package|Pins)
Orderable Information
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  • slusei0_pm
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DATA SHEET

TPS562212 4.2-V to 18-V Input, 2-A Synchronous Buck Converter in a SOT-5X3 Package

1 Features

  • 4.2-V to 18-V input voltage
  • 0.6-V to 7-V output voltage
    • Up to 2-A continuous output current
    • 45-ns minimum switching on time
    • 98% maximum duty cycle
  • High efficiency
    • Integrated 66-mΩ and 33-mΩ MOSFETs
    • 120-μA typical quiescent current
  • Highly flexible and easy to use
    • Selectable Eco-mode or FCCM operation
    • Selectable power-good indicator or external soft start
    • Precise enable input
  • High accuracy
    • ±1% (25°C) reference voltage accuracy
    • ±8.5% switching frequency tolerance
  • Small solution size
    • Internal compensation for ease of use
    • SOT-5X3 package
    • Minimum external components
  • Cycle-by-cycle current limit for both high-side and low-side MOSFETs
  • Non-latched OVP, UVP, UVLO, and TSD protections
  • Create a custom design using TPS562212 with the WEBENCH® Power Designer

2 Applications

  • Set-top box (STB), digital TV
  • Smart speaker
  • Wired networking, broadband
  • Surveillance

3 Description

The TPS562212 is a cost-effective and highly flexible synchronous buck converter that provides selectable Eco-mode operation or FCCM (force continuous conduction mode) operation. A selectable power-good indicator or external soft start is also configurable through the MODE pin. Power sequencing is possible by correctly configuring the Enable pin, power-good indicator, or external soft start. A wide input voltage range of 4.2 V to 18 V supports a wide variety of common input rails like 12 V and 15 V. It supports up to 2-A continuous output current at output voltages between 0.6 V and 7 V.

The device provides fast transient response with true fixed switching frequency through the use of the Advanced Emulated Current Mode (AECM) control topology. With internal smart loop bandwidth control, the device provides fast transient response over a wide output voltage range without the need for external compensation.

Cycle-by-cycle current limit on the high-side peak current protects the device in overload situations and is enhanced by a low-side valley current limit, which prevents current runaway. Hiccup mode would be triggered under overvoltage protection (OVP), undervoltage protection (UVP), UVLO protection, and thermal shutdown.

The device is available in a 1.6-mm × 2.1-mm SOT583 package.

Device Information
PART NUMBERPACKAGE(1)BODY SIZE (NOM)
TPS562212SOT-5X3 (8)1.6 mm × 2.1 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic
GUID-20211013-SS0I-THQH-SXX2-QSZCBHZHCLRK-low.pngEfficiency vs Output Current

4 Revision History

DATEREVISIONNOTES
October 2021*Initial Release

5 Pin Configuration and Functions

GUID-4C53E0BB-7087-4DB8-83E2-5D3A7659DA22-low.gif8-Pin SOT-5X3 DRL Package (Top View)
Table 5-1 Pin Functions
PIN I/O(1) DESCRIPTION
NAME NO.
PG/SS 1 I/O This pin can be selected as a power-good function or soft-start function, depending on the device MODE pin configuration.
  • If the power-good function is selected, this is an open-drain power-good indicator.
  • If the soft-start function is selected, an external capacitor connected from this pin to GND defines the rise time for the internal reference voltage.
VIN 2 P Input voltage supply pin for the control circuitry. Connect the input decoupling capacitors between VIN and GND.
SW 3 P Switch node terminal. Connect the output inductor to this pin.
GND 4 G GND terminal for the controller circuit and the internal circuitry
BOOT 5 P Supply input for the high-side MOSFET gate drive circuit. Connect a 0.1-µF capacitor between the BOOT and SW pins.
EN 6 I/O Enable input control. Driving EN high or leaving this pin floating enables the converter. An external resistor divider can be used to imply an adjustable VIN UVLO function.
MODE 7 I/O Device operation mode in light load (Eco-mode operation or FCCM operation) and pin 1 function (PG/SS) selection pin. Connect a resistor from MODE to GND to configure the device according to Table 7-1.
FB 8 I Converter feedback input. Connect to the output voltage with a feedback resistor divider.
(1) I = Input, I/O = Input or Output, G = Ground, P = Power

 
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