SLVSDF2A May   2017  – July 2017 TPS22970

PRODUCTION DATA.  

  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 Switching Characteristics
    7. 6.7 Typical DC Characteristics
    8. 6.8 Typical AC Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 On and Off Control
      2. 8.3.2 Quick Output Discharge (QOD)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Thermal Consideration
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Maximum Voltage Drop and On-Resistance
        2. 9.2.2.2 Managing Inrush Current
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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1 Features

  • Input Voltage Range (VIN): 0.65 V to 3.6 V
  • On-Resistance
    • RON = 4.7 mΩ (Typical) at VIN ≥ 1.8 V
    • RON = 5.1 mΩ (Typical) at VIN = 1.05 V
    • RON = 6.4 mΩ (Typical) at VIN = 0.65 V
  • Maximum Continuous Switch Current (IMAX): 4 A
  • ON State (IQ): 30 µA (Typical) at VIN > 1.2 V
  • OFF State (ISD): 1 µA (Typical) at VIN > 1.8 V
  • Controlled Slew Rate to Avoid Inrush Current
    • 3.6 V Turn-ON time (tON): 1530 μs
    • 0.65 V Turn-ON time (tON): 815 μs
  • Low Threshold Enable (ON) Supports Use of Logic as Low as 0.9 V (VIH) of Logic
  • Thermal Shutdown (TSD)
  • Quick Output Discharge (QOD): 150-Ω (Typical)

2 Applications

  • Notebook, Tablet
  • Industrial PC
  • Smartphones
  • Telecom
  • Storage

3 Description

The TPS22970 is a small, space-saving load switch with controlled Turn-ON to reduce inrush current. The device contains an N-channel MOSFET that can operate over an input voltage range of 0.65 V to 3.6 V and pulsed switch currents up to 4 A. An integrated charge pump biases the NMOS switch in order to achieve a minimum switch ON resistance (RON). The switch is controlled by an on and off input (ON), which is capable of interfacing directly with low-voltage control signals.

The TPS22970 is capable of thermal shutdown when the junction temperature is above the threshold, turning the switch off. The switch turns on again when the junction temperature stabilizes to a safe range.

The TPS22970 has a 150-Ω on-chip resistor for quick discharge of the output when switch is disabled to avoid any unknown state caused by floating supply to the downstream load.

The TPS22970 has an internally controlled rise time in order to reduce inrush current.

The TPS22970 is available in an ultra-small, space saving 8-pin WCSP package and is characterized for operation over the free-air temperature range of –40°C to +105°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS22970YZPT DSBGA (8) 1.90 mm × 0.90 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application

TPS22970 slvsdf2_simplified_block_diagram.gif