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  • TPS22918 5.5-V, 2-A, 52-mΩ On-Resistance Load Switch

    • SLVSD76C February   2016  – July 2017 TPS22918

      PRODUCTION DATA.  

  • CONTENTS
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  • TPS22918 5.5-V, 2-A, 52-mΩ On-Resistance Load Switch
  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)
        1. 8.3.2.1 QOD when System Power is Removed
        2. 8.3.2.2 Internal QOD Considerations
      3. 8.3.3 Adjustable Rise Time (CT)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Input Capacitor (CIN)
        2. 9.2.2.2 Output Capacitor (CL) (Optional)
        3. 9.2.2.3 Shutdown Sequencing During Unexpected System Power Loss
        4. 9.2.2.4 VIN to VOUT Voltage Drop
        5. 9.2.2.5 Inrush Current
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Developmental Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    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
  14. IMPORTANT NOTICE
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DATA SHEET

TPS22918 5.5-V, 2-A, 52-mΩ On-Resistance Load Switch

1 Features

  • Integrated Single Channel Load Switch
  • Ambient Operating Temperature: –40°C to +105°C
  • Input Voltage Range: 1 V to 5.5 V
  • On-Resistance (RON)
    • RON = 52 mΩ (typical) at VIN = 5 V
    • RON = 53 mΩ (typical) at VIN = 3.3 V
  • 2-A Maximum Continuous Switch Current
  • Low Quiescent Current
    • 8.3 µA (typical) at VIN = 3.3 V
  • Low-Control Input-Threshold Enables Use of 1 V or Higher GPIO
  • Adjustable Quick-Output Discharge (QOD)
  • Configurable Rise Time With CT Pin
  • Small SOT23-6 Package (DBV)
    • 2.90-mm × 2.80-mm, 0.95-mm Pitch,
      1.45 mm Height (with leads)
  • ESD Performance Tested per JESD 22
    • ±2-kV HBM and ±1-kV CDM

2 Applications

  • Industrial Systems
  • Set Top Box
  • Blood Glucose Meters
  • Electronic Point of Sale

3 Description

The TPS22918 is a single-channel load switch with configurable rise time and configurable quick output discharge. The device contains an N-channel MOSFET that can operate over an input voltage range of 1 V to 5.5 V and can support a maximum continuous current of 2 A. The switch is controlled by an on and off input, which is capable of interfacing directly with low-voltage control signals.

The configurable rise time of the device greatly reduces inrush current caused by large bulk load capacitances, thereby reducing or eliminating power supply droop. The TPS22918 features a configurable quick output discharge (QOD) pin, which controls the fall time of the device to allow design flexibility for power down and sequencing.

The TPS22918 is available in a small, leaded SOT-23 package (DBV) which allows visual inspection of solder joints. The device 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)
TPS22918 SOT-23 (6) 2.90 mm × 1.60 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.


Simplified Schematic

TPS22918 final_block2_slvsd76.gif

On-Resistance vs Input Voltage
Typical Values

TPS22918 D001_SLVSD76.gif
IOUT = –200 mA

4 Revision History

Changes from A Revision (March 2016) to B Revision

  • Updated the constant value in Equation 3 in Adjustable Rise Time (CT) sectionGo

Changes from B Revision (June 2016) to C Revision

  • Updated the Applications Section changed µF to pF in Figure 30, Figure 31, and Section 9.2.2.5Go

Changes from * Revision (February 2016) to A Revision

  • Changed device status from Product Preview to Production DataGo

5 Pin Configuration and Functions

DBV Package
6-Pin SOT-23
Top View
TPS22918 PinOut_DBV-6_SLVSD76.gif

Pin Functions

PIN I/O DESCRIPTION
NO. NAME
1 VIN I Switch input. Place ceramic bypass capacitor(s) between this pin and GND. See the Detailed Description section for more information.
2 GND — Device ground.
3 ON I Active high switch control input. Do not leave floating.
4 CT O Switch slew rate control. Can be left floating. See the Feature Description section for more information.
5 QOD O Quick Output Discharge pin. This functionality can be enabled in one of three ways.
  • Placing an external resistor between VOUT and QOD
  • Tying QOD directly to VOUT and using the internal resistor value (RPD)
  • Disabling QOD by leaving pin floating
See the Quick Output Discharge (QOD) section for more information.
6 VOUT O Switch output.

6 Specifications

6.1 Absolute Maximum Ratings

Over operating free-air temperature range (unless otherwise noted) (1) (2)
MIN MAX UNIT
VIN Input voltage –0.3 6 V
VOUT Output voltage –0.3 6 V
VON ON voltage –0.3 6 V
IMAX Maximum continuous switch current, ambient temperature = 70°C 2 A
IPLS Maximum pulsed switch current, pulse < 300 µs, 2% duty cycle 2.5 A
TJ Maximum junction temperature 125 °C
Tstg Storage temperature –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) ±1000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

Over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VIN Input voltage 0 5.5 V
VON ON voltage 0 5.5 V
VOUT Output voltage VIN V
VIH, ON High-level input voltage, ON VIN = 1 V to 5.5 V 1 5.5 V
VIL, ON Low-level input voltage, ON VIN = 1 V to 5.5 V 0 0.5 V
TA Operating free-air temperature(1) –40 105 °C
CIN Input Capacitor 1 (2) µF
(1) In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature [TA(max)] is dependent on the maximum operating junction temperature [TJ(MAX)], the maximum power dissipation of the device in the application [PD(MAX)], and the junction-to-ambient thermal resistance of the part/package in the application (θJA), as given by the following equation: TA(MAX) = TJ(MAX) – (θJA × PD(MAX)).
(2) Refer to Application and Implementation section

6.4 Thermal Information

THERMAL METRIC (1) TPS22918 UNIT
DBV (SOT-23)
6 PINS
RθJA Junction-to-ambient thermal resistance 183.2 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 151.6 °C/W
RθJB Junction-to-board thermal resistance 34.1 °C/W
ψJT Junction-to-top characterization parameter 37.2 °C/W
ψJB Junction-to-board characterization parameter 33.6 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

Unless otherwise noted, the specification in the following table applies over the full ambient operating temperature
–40°C ≤ TA ≤ +105°C. Typical values are for TA = 25°C.
PARAMETER TEST CONDITIONS TA MIN TYP MAX UNIT
IQ, VIN Quiescent current VON = 5 V, IOUT = 0 A VIN = 5.5 V –40°C to +105°C 9.2 16 µA
VIN = 5 V 8.7 16
VIN = 3.3 V 8.3 15
VIN = 1.8 V 10.2 17
VIN = 1.2 V 9.3 16
VIN = 1 V 8.9 15
ISD, VIN Shutdown current VON = 0 V, VOUT = 0 V VIN = 5.5 V –40°C to +105°C 0.5 5 µA
VIN = 5 V 0.5 4.5
VIN = 3.3 V 0.5 3.5
VIN = 1.8 V 0.5 2.5
VIN = 1.2 V 0.4 2
VIN = 1 V 0.4 2
ION ON pin input leakage current VIN = 5.5 V, IOUT = 0 A –40°C to +105°C 0.1 µA
RON On-Resistance VIN = 5.5 V, IOUT = –200 mA 25°C 51 59 mΩ
–40°C to +85°C 71
–40°C to +105°C 78
VIN = 5.0 V, IOUT = –200 mA 25°C 52 59 mΩ
–40°C to +85°C 71
–40°C to +105°C 79
VIN = 4.2 V, IOUT = –200 mA 25°C 52 59 mΩ
–40°C to +85°C 71
–40°C to +105°C 79
VIN = 3.3 V, IOUT = –200 mA 25°C 53 59 mΩ
–40°C to +85°C 71
–40°C to +105°C 80
VIN = 2.5 V, IOUT = –200 mA 25°C 53 61 mΩ
–40°C to +85°C 75
–40°C to +105°C 80
VIN = 1.8 V, IOUT = –200 mA 25°C 55 65 mΩ
–40°C to +85°C 79
–40°C to +105°C 88
VIN = 1.2 V, IOUT = –200 mA 25°C 64 77 mΩ
–40°C to +85°C 88
–40°C to +105°C 104
VIN = 1.0 V, IOUT = –200 mA 25°C 71 85 mΩ
–40°C to +85°C 100
–40°C to +105°C 116
VHYS ON pin hysteresis VIN = 1 V to 5.5 V –40°C to +105°C 107 mV
RPD Output pull down resistance(1) VIN = 5.0 V, VON = 0 V 25°C 24 Ω
–40°C to +105°C 30
VIN = 3.3 V, VON = 0 V 25°C 25
–40°C to +105°C 35
VIN = 1.8 V, VON = 0 V 25°C 45
–40°C to +105°C 60
(1) Output pull down resistance varies with input voltage. Please see Figure 7 for more information.

6.6 Switching Characteristics

Refer to the timing test circuit in Figure 21 (unless otherwise noted) for references to external components used for the test condition in the switching characteristics table. Switching characteristics shown below are only valid for the power-up sequence where VIN is already in steady state condition before the ON pin is asserted high. VON = 5 V, TA = 25 °C, QOD = Open.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN = 5 V
tON Turn-on time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 1950 µs
tOFF Turn-off time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tR VOUT rise time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2540
tF VOUT fall time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tD Delay time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 690
VIN = 3.3 V
tON Turn-on time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 1430 µs
tOFF Turn-off time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tR VOUT rise time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 1680
tF VOUT fall time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tD Delay time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 590
VIN = 1.8 V
tON Turn-on time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 965 µs
tOFF Turn-off time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tR VOUT rise time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 960
tF VOUT fall time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tD Delay time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 480
VIN = 1 V
tON Turn-on time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 725 µs
tOFF Turn-off time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 3
tR VOUT rise time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 560
tF VOUT fall time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 2
tD Delay time RL = 10 Ω, CIN = 1 µF, CL = 0.1 µF, CT = 1000 pF 430

6.7 Typical DC Characteristics

TPS22918 D002_SLVSD76.gif
VON = 5 V IOUT = 0 A
Figure 1. Quiescent Current vs Input Voltage
TPS22918 D004_SLVSD76.gif
VON = 5 V IOUT = –200 mA
Figure 3. On-Resistance vs Temperature
TPS22918 D005_SLVSD76.gif
VON = 5 V TA = 25°C
Figure 5. On-Resistance vs Output Current
TPS22918 D009_SLVSD76.gif
VIN = VOUT VON = 0 V
Figure 7. Output Pull-Down Resistance vs Input Voltage
TPS22918 D003_SLVSD76.gif
VON = 0 V IOUT = 0 A
Figure 2. Shutdown Current vs Input Voltage
TPS22918 D001_SLVSD76.gif
VON = 5 V IOUT = –200 mA
Figure 4. On-Resistance vs Input Voltage
TPS22918 D008_SLVSD76.gif
IOUT = 0 A
Figure 6. Hysteresis Voltage vs Input Voltage

6.8 Typical AC Characteristics

TPS22918 D010_SLVSD76.gif
CIN = 1 µF RL = 10 Ω CL = 0.1 µF
CT = 1000 pF
Figure 8. Rise Time vs Input Voltage
TPS22918 D012_SLVSD76.gif
CIN = 1 µF RL = 10 Ω CL = 0.1 µF QOD = Open
Figure 10. Fall Time vs Input Voltage
TPS22918 D014_SLVSD76.gif
CIN = 1 µF RL = 10 Ω CL = 0.1 µF
CT = 1000 pF
Figure 12. Turnon Time vs Input Voltage
TPS22918 918_Off Time_VIN=5V_CT=1000pF.png
VIN = 5 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω QOD = Open
Figure 14. Fall Time (tF) at VIN = 5 V
TPS22918 918_Off Time_VIN=3.3V_CT=1000pF.png
VIN = 3.3 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω QOD = Open
Figure 16. Fall Time (tF) at VIN = 3.3 V
TPS22918 918_Off Time_VIN=1.8V_CT=1000pF.png
VIN = 1.8 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω QOD = Open
Figure 18. Fall Time (tF) at VIN = 1.8 V
TPS22918 918_Off Time_VIN=1V_CT=1000pF.png
VIN = 1.0 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω QOD = Open
Figure 20. Fall Time (tF) at VIN = 1 V
TPS22918 D011_SLVSD76.gif
CIN = 1 µF RL = 10 Ω CL = 0.1 µF
Figure 9. Delay Time vs Input Voltage
TPS22918 D013_SLVSD76.gif
CIN = 1 µF RL = 10 Ω CL = 0.1 µF
Figure 11. Turnoff Time vs Input Voltage
TPS22918 918_On Time_VIN=5V_CT=1000pF.png
VIN = 5 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω CT = 1000 pF
Figure 13. Rise Time (tR) at VIN = 5 V
TPS22918 918_On Time_VIN=3.3V_CT=1000pF.png
VIN = 3.3 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω CT = 1000 pF
Figure 15. Rise Time (tR) at VIN = 3.3 V
TPS22918 918_On Time_VIN=1.8V_CT=1000pF.png
VIN = 1.8 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω CT = 1000 pF
Figure 17. Rise Time (tR) at VIN = 1.8 V
TPS22918 918_On Time_VIN=1V_CT=1000pF.png
VIN = 1.0 V CIN = 1 µF CL = 0.1 µF
RL = 10 Ω CT = 1000 pF
Figure 19. Rise Time (tR) at VIN = 1 V

7 Parameter Measurement Information

TPS22918 section_81.png
1. Rise and fall times of the control signal are 100 ns
2. Turn-off times and fall times are dependent on the time constant at the load. For TPS22918, the internal pull-down resistance RPD is enabled when the switch is disabled. The time constant is (RQOD || RL) × CL.
Figure 21. Test Circuit
TPS22918 time_wave_slvsco0.gif Figure 22. Timing Waveforms

 
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