Datasheet

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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945

www.ti.com

SLVS832C –NOVEMBER 2008–REVISED NOVEMBER 2009

LOW-INPUT-VOLTAGE CURRENT-LIMITED LOAD SWITCHES

WITH SHUT OFF AND AUTO-RESTART FEATURE

Check for Samples: TPS22941 TPS22942 TPS22943 TPS22944 TPS22945

FEATURES

DESCRIPTION

• Input Voltage Range: 1.62 V to 5.5 V

• Low ON resistance

The TPS2294x load switches provide protection to

systems and loads in high-current conditions. The

– r

= 0.4 Ω at V

= 5.5 V

devices contain a 400-mΩ current-limited P-channel

– r

= 0.5 Ω at V

= 3.3 V

MOSFET that can operate over an input voltage

– r

= 0.6 Ω at V

= 2.5 V

range of 1.62 V to 5.5 V. Current is prevented from

flowing when the MOSFET is off. The switch is

– r

= 0.8 Ω at V

= 1.8 V

controlled by an on/off input (ON), which is capable of

• Minimum Current Limit: 40 mA or 100 mA

interfacing directly with low-voltage control signals.

• Undervoltage Lockout

The TPS2294x includes thermal shutdown protection

that prevents damage to the device when a

• Thermal Shutdown

continuous over-current condition causes excessive

• Shutdown Current < 1 μA

heating by turning off the switch.

• Fast Current Limit Response Time

When the switch current reaches the maximum limit,

• Fault Blanking

the TPS22941/2/3/4/5 operates in a constant-current

• Auto Restart

mode to prohibit excessive currents from causing

damage. TPS22941/3 has a current limit of 40 mA

• 1.8-V Compatible Control Input Thresholds

and TPS22942/4/5 has a current limit of 100 mA.

• ESD Performance Tested Per JESD 22

For the TPS22941/2/5, if the constant current

– 4000-V Human-Body Model

condition still persists after 10ms, these parts shut off

(A114-B, Class II)

the switch and pull the fault signal pin (OC) low. The

– 1000-V Charged-Device Model (C101)

TPS22941/2/5, have an auto-restart feature that turns

• Tiny SC-70 (DCK) Package

the switch on again after 80 ms if the ON pin is still

active. A current limit condition on the TPS22943 and

on the TPS22944 immediately pull the fault signal pin

APPLICATIONS

low (OC pin) and the part remains in the

• Low-Current Sensor Protection

constant-current mode until the switch current falls

• HDMI Connector Protection

below the current limit.

• Notebooks

The TPS2294x is available in a SC70-5 (DCK)

• PDAs

package. It is characterized for operation over the

• GPS Devices

free-air temperature range of –40°C to 85°C.

• MP3 Players

• Peripheral Ports

Table 1. Feature List

MINIMUM CURRENT LIMIT CURRENT LIMIT

DEVICE AUTO-RESTART TIME (ms) ON PIN ACTIVITY

(mA) BLANKING TIME (ms)

TPS22941 40 10 80 Active LOW

TPS22942 100 10 80 Active LOW

TPS22943 40 0 N/A Active HIGH

TPS22944 100 0 N/A Active HIGH

TPS22945 100 10 80 Active HIGH

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (21 pages)

PAGE 1
TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 LOW-INPUT-VOLTAGE CURRENT-LIMITED LOAD SWITCHES WITH SHUT OFF AND AUTO-RESTART FEATURE Check for Samples: TPS22941 TPS22942 TPS22943 TPS22944 TPS22945 FEATURES 1 • • • • • • • • • • • • DESCRIPTION Input Voltage Range: 1.62 V to 5.5 V Low ON resistance – rON = 0.4 Ω at VIN = 5.5 V – rON = 0.5 Ω at VIN = 3.3 V – rON = 0.6 Ω at VIN = 2.5 V – rON = 0.8 Ω at VIN = 1.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com ORDERING INFORMATION (1) PACKAGE (2) TA –40°C to 85°C (1) (2) (3) SOT (SC70) – DCK TOP-SIDE MARKING (3) ORDERABLE PART NUMBER Tape and reel TPS22941DCKR 4A_ TPS22942DCKR 4B_ TPS22943DCKR 4C_ TPS22944DCKR 4D_ TPS22945DCKR 4E_ For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 DCK PACKAGE (TOP VIEW) VOUT 1 GND 2 OC 3 5 VIN 4 ON TERMINAL FUNCTIONS TERMINAL TYPE DESCRIPTION SOT (DCK) PIN NO. NAME 1 VOUT O Switch output: output of the power switch 2 GND – Ground 3 OC O Over current output flag: active LOW, open drain output that indicates an over current, supply under voltage, or over temperature state.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) MIN MAX –0.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 ELECTRICAL CHARACTERISTICS (continued) VIN = 1.62 V to 5.5 V, TA = –40°C to 85°C (unless otherwise noted) PARAMETER UVLO TEST CONDITIONS Undervoltage shutdown VIN increasing Undervoltage shutdown hysteresis TA MIN TYP (1) MAX Full 1.32 1.42 Full 1.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com TYPICAL PERFORMANCE 1.0 ON-State Resistance, rON (W) 0.9 0.8 0.7 0.6 0.5 0.4 0.3 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage, VIN (V) Figure 1. rON vs VIN 1.0 42 41 0.9 VIN = 1.8 V 40 39 Quiescent Current (uA) ON-State Resistance (W) 0.8 0.7 VIN = 3.3 V 0.6 0.5 0.4 36 35 33 32 0.2 –40 –10 25 50 Temperature (°C) Figure 2.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 TYPICAL PERFORMANCE (continued) 50 600 500 VIN = 5.5 V 400 VIN = 3.3 V 40 IIN(leakage) Current (nA) Quiescent Current (mA) 45 35 VIN = 1.8 V 30 VIN = 3.3 V 300 200 VIN = 1.8 V 100 0 25 –40 –10 25 50 85 –40 –10 Temperature (°C) 25 50 85 Temperature (°C) Figure 4. Quiescent Current vs Temperature Figure 5. IIN(leakage) vs Temperature 250 500 450 VIN = 3.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com TYPICAL PERFORMANCE (continued) 500 100 450 50 400 0 IOUT(leakage) Current (nA) IIN(off) Current (nA) 350 300 250 200 150 VIN = 1.8 V –50 –100 VIN = 3.3 V –150 –200 100 –250 50 0 1.0 –300 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 –40 –10 Supply Voltage (V) Figure 8. IIN(off) vs VIN 85 0.18 5.5 VIN = 1.62 V 5.0 VIN = 1.8 V 4.5 VIN = 1.95 V 4.0 VIN = 2.3 V 3.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 TYPICAL PERFORMANCE (continued) 180 80 TA = –40°C 160 TA = 85°C TA = 25°C 70 140 Current Limit, ILIM (mA) Current Limit (mA) 60 120 100 80 60 50 40 30 40 20 20 10 0 –40 25 0 85 0 Junction Temperature, TJ (°C) 0.5 1.5 1 2.5 2 3 3.5 VIN – VOUT (V) Figure 12. ILIM vs Temperature (TPS22942, TPS22944, TPS22945) Figure 13.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com TYPICAL PERFORMANCE (continued) 13.5 70 CL = 0.1 mF RL = 350 Ω VIN = 3.3 V 65 tON 60 13.0 Blanking Time (ms) tOFF/tON (ms) 55 50 45 40 35 12.5 12.0 11.5 tOFF 30 11.0 25 20 –50 –35 –20 –5 10 25 40 55 70 85 100 10.5 –40 Temperature (°C) –10 25 50 85 Temperature (°C) Figure 16. tON/tOFF Figure 17. tBLANK vs Temperature (VIN = 3.
PAGE 11
TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 TYPICAL PERFORMANCE (continued) 5.0 10 4.5 9 4.0 8 IOUT 3.5 7 3.0 Control Input Voltage (V) VOUT 2 V/DIV IOUT 100 mA/DIV VOC 2 V/DIV 6 2.5 5 VON 2.0 4 1.5 3 1.0 2 0.5 1 0.0 0 –0.5 –1 –1.0 –2 –1.5 CL = 0.1 mF –3 –2.0 RL = 500 W VIN = 3.3 V –4 –2.5 –3.
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com TYPICAL PERFORMANCE (continued) VIN 2 V/DIV CIN = 10 mF COUT = 1 mF CIN = 10 mF VIN/VON 1 V/DIV COUT = 1 mF VON 2 V/DIV IOUT 100 mA/DIV IOUT 100 mA/DIV VOUT Shorted to Ground 20 ms/DIV Figure 24. Short-Circuit Response Time (Switch Powerup to Hard Short) 12 Submit Documentation Feedback 20 ms/DIV Figure 25.
PAGE 13
TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 www.ti.com SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 APPLICATION INFORMATION VOUT VIN 100 kW On 5.5-V Battery ON 10 µF Off OC GND 0.1 µF 500 W Figure 26. Typical Application Circuit, Active-High Enabled Device (TPS22943, TPS22944 and TPS22945 Only) On/Off Control The ON pin controls the state of the switch. Activating ON continuously holds the switch in the on state as long as there is no fault.
PAGE 14
TPS22941, TPS22942, TPS22943, TPS22944, TPS22945 SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009 www.ti.com Output Capacitor A 0.1-μF capacitor, COUT, should be placed between VOUT and GND. This capacitor will prevent parasitic board inductances from forcing VOUT below GND when the switch turns off. For the TPS2294x, the total output capacitance needs to be kept below a maximum value, COUT(max), to prevent the part from registering an over-current condition and turning-off the switch.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPS22941DCKR SC70 DCK 5 3000 180.0 9.2 2.3 2.55 1.2 4.0 8.0 Q3 TPS22942DCKR SC70 DCK 5 3000 180.0 9.2 2.3 2.55 1.2 4.0 8.0 Q3 TPS22943DCKR SC70 DCK 5 3000 180.0 9.2 2.3 2.55 1.2 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS22941DCKR SC70 DCK 5 3000 205.0 200.0 33.0 TPS22942DCKR SC70 DCK 5 3000 205.0 200.0 33.0 TPS22943DCKR SC70 DCK 5 3000 205.0 200.0 33.0 TPS22944DCKR SC70 DCK 5 3000 205.0 200.0 33.0 TPS22945DCKR SC70 DCK 5 3000 205.0 200.0 33.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.