SLVS984B September   2009  – March 2015 TPS22946

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 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 Detection Schemes
        1. 8.3.1.1 Overtemperature Detection
        2. 8.3.1.2 Hard-Short Detection
        3. 8.3.1.3 Moderate Overcurrent Detection
        4. 8.3.1.4 Current Limiting Mode
        5. 8.3.1.5 Fault Reporting
        6. 8.3.1.6 Power-On and Power-Off Sequence
        7. 8.3.1.7 Automatic Disable in Case of Permanent Overcurrent
      2. 8.3.2 Inrush Current Time-out Feature
      3. 8.3.3 CL Control Pin
      4. 8.3.4 Overtemperature Protection
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 On/Off Control
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VI Input voltage VIN, VOUT, ON, CL –0.3 6 V
TJ Operating junction temperature –40 125 °C
Tstg Storage temperature –65 150 °C

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per JEDEC specification JESD22 (A114-B, Class II)(1) ±6000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±2000
(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 1.62 5.5 V
VON ON pin voltage 0 5.5 V
VCL CL pin voltage 0 VIN V
VOUT OUT pin voltage 0 VIN V
TA Ambient free-air temperature –40 85 °C
tCLSET CL pin setting time 8 ms
CIN Input capacitor 1(1) μF
VIH ON high-level input voltage VIN = 1.8 V 1.1 5.5 V
VIN = 2.5 V 1.2 5.5
VIN = 3.3 V 1.3 5.5
VIN = 5.5 V 1.4 5.5
VIL ON low-level input voltage VIN = 1.8 V 0.4 V
VIN = 2.5 V 0.4
VIN = 3.3 V 0.5
VIN = 5.5 V 0.6
VIH CL low-level input voltage VIN = 1.62 V to 5.5 V, IIH = 55 μA 0.7 VIN VIN V
VIL CL high-level input voltage VIN = 1.62 V to 5.5 V, IIL = 55 μA GND 0.3 VIN V

6.4 Thermal Information

THERMAL METRIC(1) TPS22946 UNIT
YZP (DSBGA)
6 PINS
RθJA Junction-to-ambient thermal resistance 131 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 1.3
RθJB Junction-to-board thermal resistance 22.6
ψJT Junction-to-top characterization parameter 5.2
ψJB Junction-to-board characterization parameter 22.6
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

VIN = 1.62 V to 5.5 V, TYP values at TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS TA(1) MIN TYP MAX UNIT
IIN Average quiescent current IOUT = 0 mA, VIN = 4.5 V to 5.5 V Full range 1.5 5 μA
IOUT = 0 mA, VIN = 3.0 V to 3.6 V 1.3 4
IOUT = 0 mA, VIN = 1.62 V to 1.98 V 1 3
IIN(OFF) OFF state supply current VON = 0 V VIN = 3.6 V, VOUT open Full range 0.1 1 μA
IOUT(LEAKAGE) OFF state switch current VON = 0 V VIN = 3.6 V,
VOUT short to GND		 Full range 0.1 1.1 μA
rON ON-state resistance IOUT = –100 mA VIN = 5.5 V 25°C 0.3 0.4 Ω
Full range 0.45
VIN = 3.3 V 25°C 0.4 0.5
Full range 0.55
VIN = 2.5 V 25°C 0.5 0.6
Full range 0.65
VIN = 1.8 V 25°C 0.6 0.8
Full range 0.85
VIN = 1.62 V 25°C 0.7 0.9
Full range 1
ION ON input leakage current VON = VIN or GND Full range 1 μA
ILIM Current limit VIN = 1.8 V, VOUT = 1.5 V, CL = GND Full range 70 85 120 mA
VIN = 3.3 V, VOUT = 3.0 V, CL = GND Full range 60 80 115
VIN = 1.8 V, VOUT = 1.5 V, CL = VIN Full range 155 175 235
VIN = 3.3 V, VOUT = 3.0 V, CL = VIN Full range 135 165 230
VIN = 1.8 V, VOUT = 1.5 V, CL floating Full range 30 45 60
VIN = 3.3 V, VOUT = 3.0 V, CL floating Full range 28 40 60
Ilimit_inrush Inrush current limit Rl = 1 Ω, VIN = 3.3 V, VOUT = 2.3 V Full range 375 435 685 mA
Thermal shutdown(2) Shutdown threshold Full range 135 °C
Return from shutdown 125
Hysteresis 10
VOL OC output logic low voltage VIN = 5 V, ISINK = 10 mA Full range 0.1 0.2 V
VIN = 1.8 V, ISINK = 10 mA 0.1 0.3
IOH OC output high leakage current VIN = 5 V, Switch ON Full range 1 μA
(1) Full range TA = –40°C to 85°C

6.6 Switching Characteristics

VIN = 1.8 V, RL = 50 Ω, CL = 1 μF, TA = –40°C to 85°C, TYP values at TA = 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tPWRON Power-on time RL = 50 Ω, CL = 1 μF 192 μs
tPWROFF Power-off time RL = 50 Ω, CL = 1 μF 0.55 μs
tON Turnon time RL = 50 Ω, CL = 1 μF 125 μs
tOFF Turnoff time RL = 50 Ω, CL = 1 μF 115 μs
tR VOUT rise time RL = 50 Ω, CL = 1 μF 35 μs
tF VOUT fall time RL = 50 Ω, CL = 1 μF 120 μs
tBLANK Overcurrent blanking time 7 10 15 ms
tRSTART Auto-restart time 50 70 95 ms
tTIMEOUT Overcurrent detection time-out(3) VIN = VON = 3.3 V, hard short(2) 6000 ms
tOVRTMP Overtemperature detection maximum response time 7.7 ms
tMODOC Moderate overcurrent detection maximum response time VIN = VON = 1.8 V, Moderate over-current condition(1) 63.5 ms
VIN = VON = 3.3 V, Moderate overcurrent condition(1) 65.5
tHARDSHORT Hard-short detection maximum response time VIN = VON = 1.8 V, hard short(2) 270 μs
VIN = VON = 3.3 V, hard short(2) 295
(1) If the current going through the switch is above ILIM, then the moderate over-current condition is activated
(2) Hard short check is performed at the output voltage of the switch. Hard short condition is active when VOUT < 2/3 VIN.

6.7 Typical Characteristics

TPS22946 g_on_resist_vin_lvs984.gifFigure 1. ON-Resistance vs Input Voltage
TPS22946 g_iin_quiesc_temp_lvs984.gifFigure 3. Input Current (Quiescent) vs Temperature
TPS22946 g_iin_off_temp_lvs984.gifFigure 5. Input Current (Off) vs Temperature
TPS22946 g_ilim_vin_lvs984.gifFigure 7. Current Limit vs Input Voltage
TPS22946 g_trestart_temp_lvs984.gifFigure 9. tReset vs Temperature
TPS22946 g_tpwroff_temp_lvs984.gifFigure 11. tPWROFF vs Temperature
TPS22946 osc_ton_resp_lvs984.gifFigure 13. tON Response
TPS22946 osc_tblank_resp_lvs984.gifFigure 15. tBlank Response
TPS22946 osc_hard_short_resp_lvs984.gifFigure 17. Hard Short-Circuit Response
TPS22946 osc_moderate_oc_resp_lvs984.gifFigure 19. Moderate Overcurrent Response
TPS22946 g_on_resist_temp_lvs984.gifFigure 2. ON-Resistance Vs Temperature
TPS22946 g_iin_leak_temp_lvs984.gifFigure 4. Input Current (Leakage) vs Temperature
TPS22946 g_ilim_temp_lvs984.gifFigure 6. Current Limit vs Temperature
TPS22946 g_tblank_temp_lvs984.gifFigure 8. tBlank vs Temperature
TPS22946 g_tpwron_temp_lvs984.gifFigure 10. tPWRON vs Temperature
TPS22946 g_on_threshold_lvs984.gifFigure 12. ON Threshold
TPS22946 osc_toff_resp_lvs984.gifFigure 14. tOFF Response
TPS22946 osc_trestart_resp_lvs984.gifFigure 16. tRestart Response
TPS22946 osc_short_cx_resp_lvs984.gifFigure 18. Short-Circuit Response