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TPS2041B-EP

www.ti.com

SLVSAX8 – SEPTEMBER 2011

CURRENT-LIMITED POWER-DISTRIBUTION SWITCH

Check for Samples: TPS2041B-EP

FEATURES

APPLICATIONS

• 70-mΩ High-Side MOSFET • Heavy Capacitive Loads

• 500-mA Continuous Current • Short-Circuit Protection

• Thermal and Short-Circuit Protection

SUPPORTS DEFENSE, AEROSPACE,

• Current Limit:

AND MEDICAL APPLICATIONS

0.45 A (Min), 1.55 A (Max)

• Controlled Baseline

• Operating Range: 2.7 V to 5.5 V

• One Assembly/Test Site

• 0.6-ms Typical Rise Time

• One Fabrication Site

• Undervoltage Lockout

• Available in Military (–55°C/125°C)

• Deglitched Fault Report (OC)

Temperature Range

• No OC Glitch During Power Up

• Extended Product Life Cycle

• Maximum Standby Supply Current: 1 μA

• Extended Product-Change Notification

• Bidirectional Switch

• Product Traceability

• ESD Protection Level Per AEC-Q100

Classification

• UL Recognized, File Number E169910

DESCRIPTION

The TPS2041B power-distribution switch is intended for applications where heavy capacitive loads and short

circuits are likely to be encountered. This device incorporates 70-mΩ N-channel MOSFET power switches for

power-distribution systems that require multiple power switches in a single package. Each switch is controlled by

a logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise

times and fall times to minimize current surges during switching. The charge pump requires no external

components and allows operation from supplies as low as 2.7 V.

When the output load exceeds the current-limit threshold or a short is present, the device limits the output current

to a safe level by switching into a constant-current mode, pulling the overcurrent (OC) logic output low. When

continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction

temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal

shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains

off until valid input voltage is present. This power-distribution switch is designed to set current limit at 1 A (typ).

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 (24 pages)

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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com CURRENT-LIMITED POWER-DISTRIBUTION SWITCH Check for Samples: TPS2041B-EP FEATURES APPLICATIONS • • • • • • 1 • • • • • • • • • 70-mΩ High-Side MOSFET 500-mA Continuous Current Thermal and Short-Circuit Protection Current Limit: 0.45 A (Min), 1.55 A (Max) Operating Range: 2.7 V to 5.5 V 0.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS over recommended operating junction temperature range, VI(IN) = 5.5 V, IO = 0.5 A, VI(EN) = 0 V (unless otherwise noted) TEST CONDITIONS (1) PARAMETER MIN TYP MAX UNIT Power Switch rDS(on) tr tf Static drain-source on-state resistance, 5-V or 3.3-V operation VI(IN) = 5 V or 3.3 V, IO = 0.5 A Static drain-source on-state resistance, 2.7-V operation VI(IN) = 2.7 V, IO = 0.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com DEVICE INFORMATION Terminal Functions TERMINAL NAME I/O NO. I DESCRIPTION EN 4 GND 2 Enable input, logic low turns on power switch IN 5 I Input voltage OC 3 O Overcurrent, open-drain output, active low OUT 1 O Power-switch output Ground Functional Block Diagram (See Note A) CS IN OUT Charge Pump EN Driver Current Limit OC UVLO GND A.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION OUT RL tf tr CL VO(OUT) 90% 10% 90% 10% TEST CIRCUIT 50% VI(EN) 50% toff ton VO(OUT) 50% VI(EN) 90% 50% toff ton 90% VO(OUT) 10% 10% VOLTAGE WAVEFORMS Figure 2. Test Circuit and Voltage Waveforms RL = 10 W, CL = 1 mF TA = 255C VI(EN) VI(EN) 5 V/div VI(EN) VI(EN) 5 V/div RL = 10 W, CL = 1 mF TA = 255C VO(OUT) 2 V/div VO(OUT) 2 V/div t − Time − 500 ms/div t − Time − 500 ms/div Figure 3.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) RL = 10 W, CL = 100 mF TA = 255C VI(EN) VI(EN) 5 V/div VI(EN) VI(EN) 5 V/div RL = 10 W, CL = 100 mF TA = 255C VO(OUT) 2 V/div VO(OUT) 2 V/div t − Time − 500 ms/div t − Time − 500 ms/div Figure 5. Turn-On Delay and Rise Time With 100-μF Load Figure 6.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) VO(OC) 2 V/div VO(OC) 2 V/div IO(OUT) 500 mA/div IO(OUT) 500 mA/div t − Time − 2 ms/div Figure 9. 3-Ω Load Connected to Enabled Device t − Time − 2 ms/div Figure 10.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS TURN-ON TIME vs INPUT VOLTAGE TURN-OFF TIME vs INPUT VOLTAGE 1.0 3.3 CL = 100 mF, RL = 10 W, TA = 255C 0.9 0.8 CL = 100 mF, RL = 10 W, TA = 255C 3.2 Turnoff Time − ms Turnon Time − ms 0.7 0.6 0.5 0.4 3.1 3 0.3 0.2 2.9 0.1 0 2 3 4 5 VI − Input Voltage − V 2.8 6 3 4 5 6 VI − Input Voltage − V Figure 11. Figure 12. RISE TIME vs INPUT VOLTAGE FALL TIME vs INPUT VOLTAGE 0.25 0.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) SUPPLY CURRENT, OUTPUT ENABLED vs JUNCTION TEMPERATURE SUPPLY CURRENT, OUTPUT DISABLED vs JUNCTION TEMPERATURE 0.5 VI = 5.5 V 60 VI = 5 V 50 40 30 20 VI = 3.3 V 10 0 -55 -25 VI = 2.7 V 50 100 125 25 75 TJ - Junction Temperature - °C 0 VI = 5.5 V 0.45 VI = 5 V 0.4 0.35 0.3 VI = 2.7 V VI = 3.3 V 0.25 0.2 0.15 0.1 0.05 0 -55 150 -25 75 25 0 50 100 TJ - Junction Temperature - °C 125 Figure 15. Figure 16.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) THRESHOLD TRIP CURRENT vs INPUT VOLTAGE UNDERVOLTAGE LOCKOUT vs JUNCTION TEMPERATURE 2.3 2 TA = 255C Load Ramp = 1 A/10 ms UVLO Rising UVLO − Undervoltage Lockout − V Threshold Trip Current − A 1.8 1.6 1.4 1.2 1 2.5 3 3.5 4 4.5 5 5.5 6 2.26 2.22 UVLO Falling 2.18 2.14 2.1 -55 -25 VI − Input Voltage − V 75 0 25 50 100 TJ - Junction Temperature - °C Figure 19. 125 150 Figure 20.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com APPLICATION INFORMATION Power-Supply Considerations TPS2041B 5 Power Supply 2.7 V to 5.5 V IN OUT 0.1 µF 1 Load 0.1 µF 3 4 22 µF OC EN GND 2 Figure 22. Typical Application A 0.01-μF to 0.1-μF ceramic bypass capacitor between IN and GND, close to the device, is recommended. Placing a high-value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com V+ TPS2041B GND IN Rpullup OC OUT EN Figure 23. Typical Circuit for the OC Pin Power Dissipation and Junction Temperature The low on-resistance on the N-channel MOSFET allows the small surface-mount packages to pass large currents. The thermal resistances of these packages are high compared to those of power packages; it is good design practice to check power dissipation and junction temperature.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com Universal Serial Bus (USB) Applications The universal serial bus (USB) interface is a 12-Mb/s, or 1.5-Mb/s, multiplexed serial bus designed for low-to-medium bandwidth PC peripherals (e.g., keyboards, printers, scanners, and mice). The four-wire USB interface is conceived for dynamic attach-detach (hot plug-unplug) of peripherals. Two lines are provided for differential data, and two lines are provided for 5-V power distribution. USB data is a 3.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com Low-Power and High-Power Bus-Powered Functions Both low-power and high-power bus-powered functions obtain all power from upstream ports; low-power functions always draw less than 100 mA; high-power functions must draw less than 100 mA at power up and can draw up to 500 mA after enumeration. If the load of the function is more than the parallel combination of 44 Ω and 10 μF at power up, the device must implement inrush current limiting (see Figure 25).
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com TUSB2046 Hub Controller Upstream Port SN75240 BUSPWR A C B D GANGED D+ D- DP0 DP1 DM0 DM1 Tie to TPS2041B EN Input D+ GND IN 5V DM2 5-V Power Supply EN DM3 D+ A C B D 1 µF TPS76333 D- SN75240 Ferrite Beads GND DP4 IN 0.1 µF 4.7 µF 5V 33 µF (see Note A) DP3 OUT 3.3 V 4.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com Generic Hot-Plug Applications In many applications, it may be necessary to remove modules or PC boards while the main unit is still operating. These are considered hot-plug applications. Such implementations require the control of current surges seen by the main power supply and the card being inserted.
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TPS2041B-EP SLVSAX8 – SEPTEMBER 2011 www.ti.com Overcurrent (OC) The OC open-drain output is asserted (active low) when an overcurrent or overtemperature condition is encountered. The output remains asserted until the overcurrent or overtemperature condition is removed. A 10-ms deglitch circuit prevents the OC signal from oscillation or false triggering. If an overtemperature shutdown occurs, the OC is asserted instantaneously. Current Sense A sense FET monitors the current supplied to the load.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 31-Dec-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS2041BMDBVTEP Package Package Pins Type Drawing SPQ SOT-23 250 DBV 5 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 178.0 9.0 Pack Materials-Page 1 3.3 B0 (mm) K0 (mm) P1 (mm) 3.2 1.4 4.0 W Pin1 (mm) Quadrant 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 31-Dec-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS2041BMDBVTEP SOT-23 DBV 5 250 180.0 180.0 18.
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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.