SLVS908D February   2009  – June 2015 TPS22949

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  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 Current Limiter Electrical Characteristics
    7. 7.7 Low-Noise LDO Regulator Electrical Characteristics
    8. 7.8 Current Limiter Switching Characteristics
    9. 7.9 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Undervoltage Lockout (UVLO)
      2. 8.3.2 Fault Reporting
      3. 8.3.3 Current Limiting
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Input Voltage
      2. 9.1.2 Input/Output Capacitors
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Start-Up Sequence
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings(1)

MIN MAX UNIT
VI Input voltage VIN, EN1, EN2, V+ –0.3 6 V
VOUTCL Current limiter output voltage VIN + 0.3 V
TJ Operating junction temperature –40 105 °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.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±3500 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.

7.3 Recommended Operating Conditions

MIN NOM MAX UNIT
VIN Input voltage(1) 1.62 4.5 V
VOUTCL Current limiter output voltage VIN V
V+ Supply voltage 2.6 5.5 V
CIN Input capacitor 1 μF
TA Ambient free-air temperature –40 85 °C
CONTROL INPUTS (EN1, EN2)
VIH High-level input voltage 1.4 5.5 V
VIL Low-level input voltage 0.4 V

7.4 Thermal Information

THERMAL METRIC(1) TPS22949x UNIT
YZP [DSBGA] DRG [WSON]
8 PINS 8 PINS
RθJA Junction-to-ambient thermal resistance 105.8 51.3 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 1.6 65.4 °C/W
RθJB Junction-to-board thermal resistance 10.8 25.9 °C/W
ψJT Junction-to-top characterization parameter 3.1 1.3 °C/W
ψJB Junction-to-board characterization parameter 10.8 26 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance N/A 6.1 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

7.5 Electrical Characteristics

TA = –40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP(1) MAX UNIT
IGND Ground pin current EN1 and EN2 = V+
V+ = VOUT + 1.4 V or 2.5, whichever > 5.5 V,
VOUTCL ≥ VOUTLDO + 0.5 V
IOUT2 = 0 mA		 85 110 μA
IGNDCL Ground pin current (current limiter only) EN1 = V+ and EN2 = 0 40 75 μA
IGND(OFF) OFF-state ground pin current EN1 and EN2 = GND,
VOUTCL = Open,
VOUTLDO = Open		 VIN = V+ = 3.3 V 2 μA
VIN = 3.6 V, V+ = 5.5 V 6
IEN2 Enable pin 2 current, enabled VEN2 = V+ =5.5 V, VIN = 4.5 V 1 μA
IEN1 Enable pin 1 current, enabled VEN1 = V+ = 5.5 V, VIN = 4.5 V 1 μA
Thermal shutdown Shutdown threshold (TA) TPS22949 122 °C
TPS22949A 135
Return from shutdown TPS22949 112
TPS22949A 120
Hysteresis TPS22949 10
TPS22949A 10
(1) Typical values are at VIN = 3.3 V and TA = 25°C.

7.6 Current Limiter Electrical Characteristics

over operating free-air temperature range, V+ = 3.3 V, EN1 = V+, EN2 = GND (unless otherwise noted)
PARAMETER TEST CONDITIONS TA YZP PACKAGE DRG PACKAGE UNIT
MIN TYP MAX MIN TYP MAX
rON ON-state resistance IOUT = 20 mA VIN = 4.5 V 25°C 0.3 0.4 0.4 0.5 Ω
Full 0.5 0.6
VIN = 3.3 V 25°C 0.35 0.6 0.45 0.7
Full 0.7 0.8
VIN = 2.5 V 25°C 0.4 0.7 0.5 0.8
Full 0.8 0.9
VIN = 1.8 V 25°C 0.6 0.9 0.7 1
Full 1.0 1.1
VIN = 1.62 V 25°C 0.7 1.0 0.8 1.1
Full 1.1 1.2
ILIM Current limit VOUT = 3 V VIN = 3.3 V Full 100 150 200 100 150 200 mA
ILIM (INRUSH) Power-ON inrush current limit (TPS22949A only) VOUT = 3 V VIN = 3.3 V Full 750 750
UVLO-CL Undervoltage shutdown VIN increasing 1.39 1.49 1.59 1.39 1.49 1.59 V
Undervoltage shutdown hysteresis 30 30 mV
OC output logic low voltage ISINK = 10 mA VIN = 4.5 V Full 0.1 0.3 0.1 0.3 V
VIN = 1.8 V 0.2 0.4 0.2 0.4

7.7 Low-Noise LDO Regulator Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VOUTLDO Output voltage(1) 1.76 1.8 1.84 V
ΔVOUTLDO/ΔVIN VIN line regulation VIN = VOUTLDO + 0.5 V to 4.5 V, IOUT = 1 mA ±0.1 %/V
VIN line transient ΔVIN = 400 mV, tr = tf = 1 μs ±2 mV
ΔVOUTLDO/ΔV+ V+ line regulation VIN = VOUTLDO + 1.4 V or 2.5 V, whichever is > 5.5 V,
IOUT = 1 mA		 ±0.1 %/V
V+ line transient ΔVIN = 600 mV, tr = tf = 1 μs ±5 mV
ΔVOUTLDO/ΔIOUT2 Load regulation IOUT2 = 0 to 100 mA (no load to full load) ±0.01 %/V
Load transient IOUT2 = 0 to 100 mA, tr = tf = 1 μs ±35 mV
VDO Dropout voltage
(VDO = VIN – VOUTLDO)		 VIN = VOUTLDO(NOM) – 0.1 V, V+ – VOUTLDO(NOM) = 1.4 V,
IOUT = 100 mA		 110 200 mV
VIN PSRR Power supply rejection ratio VOUTCL – VOUTLDO ≥ 0.5 V,
V+ = VOUTLDO + 1.4 V,
IOUT = 100 mA,		 f = 10 Hz 75 dB
f = 100 Hz 75
f = 1 kHz 80
f = 10 kHz 80
f = 100 kHz 85
f = 1 MHz 85
V+ PSRR Power supply rejection ratio VOUTCL – VOUTLDO ≥ 0.5 V,
V+ = VOUTLDO + 1.4 V,
IOUT = 100 mA,		 f = 10 Hz 80 dB
f = 100 Hz 80
f = 1 kHz 75
f = 10 kHz 65
f = 100 kHz 55
f = 1 MHz 35
VN Output noise voltage V+ ≥2.5 V,
VOUTLDO = VOUTCL + 0.5 V		 BW = 10 Hz to 100 kHz 50 μVrms
tSTR Start-up time VOUT = 95%,
VOUT(NOM), IOUT = 100 mA, COUT = 2.2 μF		 130 250 μs
UVLO-V+ Undervoltage lockout V+ rising 2.3 2.45 2.55 V
Hysteresis V+ falling 150 mV
(1) LDO output voltage is fixed at 1.8 V. However, output voltages from 0.9 V to 3.6 V in 50-mV increments are available through the use of innovative factory EEPROM programming; minimum order quantities may apply. Contact factory for details and availability.

7.8 Current Limiter Switching Characteristics

VIN = 3.3 V, TA = 25°C, RL = 500 Ω, CL = 0.1 μF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tON Turnon time RL = 500 Ω, CCL = 0.1 μF 95 μs
tOFF Turnoff time RL = 500 Ω, CCL = 0.1 μF 2 μs
tr VOUT rise time RL = 500 Ω, CCL = 0.1 μF 25 μs
tf VOUT fall time RL = 500 Ω, CCL = 0.1 μF 10 μs
tBLANK Overcurrent blanking time 6 12 18 ms
tRSTRT Auto-restart time 40 80 120 ms
tINRUSH Power-ON inrush current limit time (TPS22949A only) RL = 500 Ω, CCL = 0.1 μF 150 μs
Short-circuit response time VIN = VEN1 = 3.3 V, moderate overcurrent condition 11 μs
VIN = VEN1 = 3.3 V, hard short 5

7.9 Typical Characteristics

TPS22949 TPS22949A g_ron_vin_lvs908.gif
TA = 25°C
Figure 1. ON-State Resistance vs Input Voltage
TPS22949 TPS22949A g_ignd_vin_55v_lvs908.gif
V+ = 5.5 V
Figure 3. Ground Pin Current vs Input Voltage
TPS22949 TPS22949A g_ignd_ta_lvs908.gif
V+ = 5.5 V
Figure 5. Ground Pin Current vs Temperature
TPS22949 TPS22949A g_igndcl_ta_lvs908.gif
V+ = 5.5 V
Figure 7. Ground Pin Current vs Temperature
(Current Limiter Only)
TPS22949 TPS22949A g_igndoff_vin_vplus_lvs908.gif
VIN = V+
Figure 9. OFF-State Ground Current vs Input Voltage
TPS22949 TPS22949A g_voutldo_ta_lvs908.gifFigure 11. Output Voltage vs Temperature
TPS22949 TPS22949A g_vinlinereg_0_lvs908.gif
IOUT = 0 mA
Figure 13. Input Voltage, VIN, Line Regulation
TPS22949 TPS22949A g_vpluslinereg_0_lvs908.gif
IOUT = 0 mA
Figure 15. Input Voltage, V+, Line Regulation
TPS22949 TPS22949A g_loadreg_100_lvs908.gif
IOUT = 100 mA
Figure 17. Load Regulation
TPS22949 TPS22949A g_loadtrans_lvs908.gifFigure 19. Load Transient
TPS22949 TPS22949A g_loadtrans_vplus_lvs908.gifFigure 21. V+ Load Transient
TPS22949 TPS22949A g_vinpsrr_freq_lvs908.gifFigure 23. PSRR vs Frequency
TPS22949 TPS22949A g_tontoff_ta_lvs908.gifFigure 25. tON/tOFF vs Temperature
TPS22949 TPS22949A g_en1thresholds_lvs908.gif
V+ = 5.5 V
Figure 27. EN1 (Current Limiter) Input Thresholds
TPS22949 TPS22949A g_tblank_lvs908.gif
VDRV signal forces the device to go into overcurrent mode.
Figure 29. tBLANK Response
TPS22949 TPS22949A g_currlimt_ton_lvs908.gif
Figure 31. Current Limiter tON Response
TPS22949 TPS22949A g_shrtcir_voutcl_gnd_lvs908.gifFigure 33. Short-Circuit Response Time
(VOUTCL Shorted to GND)
TPS22949 TPS22949A g_shrtcir_switch_hardshrt_lvs908.gifFigure 35. Short-Circuit Response Time (Switch Power Up to Hard Short) (TPS22949)
TPS22949 TPS22949A g_shrtcir_switch_hardshrt_a_lvs908.gifFigure 37. Short-Circuit Response Time (Switch Power Up to Hard Short) (TPS22949A)
TPS22949 TPS22949A g_currlim_currlim_lvs908.gifFigure 39. Current Limit Response Time (Current Limiter)
TPS22949 TPS22949A g_ron_ta_lvs908.gif
V+ = 5.5 V
Figure 2. ON-State Resistance vs Temperature,
TPS22949 TPS22949A g_ignd_vin_33v_lvs908.gif
V+ = 3.3 V
Figure 4. Ground Pin Current vs Input Voltage
TPS22949 TPS22949A g_igndcl_vin_lvs908.gif
V+ = 5.5 V
Figure 6. Ground Pin Current vs Input Voltage
(Current Limiter Only)
TPS22949 TPS22949A g_igndoff_vin_lvs908.gif
V+ = 5.5 V
Figure 8. OFF-State Ground Current vs Input Voltage
TPS22949 TPS22949A g_igndoff_ta_lvs908.gif
Figure 10. OFF-State Ground Current vs Temperature
TPS22949 TPS22949A g_vldo_ioutldo_lvs908.gifFigure 12. LDO Dropout Voltage vs Output Current
TPS22949 TPS22949A g_vinlinereg_100_lvs908.gif
IOUT = 100 mA
Figure 14. Input Voltage, VIN, Line Regulation
TPS22949 TPS22949A g_vpluslinereg_100_lvs908.gif
IOUT = 100 mA
Figure 16. Input Voltage, V+, Line Regulation
TPS22949 TPS22949A g_loadreg_10_lvs908.gif
IOUT = 10 mA
Figure 18. Load Regulation Under Light Loads
TPS22949 TPS22949A g_loadtrans_vin_lvs908.gifFigure 20. VIN Load Transient
TPS22949 TPS22949A g_outspecdens_freq_lvs908.gifFigure 22. Output Spectral Noise Density vs Frequency
TPS22949 TPS22949A g_vpluspsrr_freq_lvs908.gifFigure 24. V+ PSRR vs Frequency
TPS22949 TPS22949A g_trisetfall_ta_lvs908.gifFigure 26. trise/tfall vs Temperature
TPS22949 TPS22949A g_en2thresholds_lvs908.gif
VIN = 3.3 V
Figure 28. EN2 (LDO) Input Thresholds
TPS22949 TPS22949A g_trestart_lvs908.gif
VDRV signal forces the device to go into overcurrent mode.
Figure 30. tRESTART Response
TPS22949 TPS22949A g_currlimt_toff_lvs908.gifFigure 32. Current Limiter tOFF Response
TPS22949 TPS22949A g_shrtcir_voutldo_gnd_lvs908.gifFigure 34. Short-Circuit Response Time
(VOUTLDO Shorted to GND)
TPS22949 TPS22949A g_shrtcir_pwrup_hardshrt_lvs908.gifFigure 36. Short-Circuit Response Time (LDO Power Up to Hard Short) (TPS22949)
TPS22949 TPS22949A g_shrtcir_pwrup_hardshrt_a_lvs908.gifFigure 38. Short-Circuit Response Time (LDO Power Up to Hard Short) (TPS22949A)
TPS22949 TPS22949A g_currlim_ldo_lvs908.gifFigure 40. Current Limit Response Time (LDO)