Datasheet

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FEATURES

GND

OUT

DESCRIPTION

TPS2049

www.ti.com

......................................................................................................................................... SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007

SINGLE-CHANNEL 100 mA POWER SWITCH

• SOIC-8 Package

• 100-mA Continuous Current • Ambient Temperature Range: – 40 ° C to 85 ° C

• 600-m Ω High-Side MOSFET • 2 µ S Response Time to Short Circuit

• Thermal and Short-Circuit Protection

• Operating Range: 2.7 V to 5.5 V

• 0.6-ms Typical Rise Time

• Undervoltage Lockout

• Deglitched Fault Report ( OC)

• 43 µ A Quiescent Supply Current

• 1- µ A Maximum Standby Supply Current

The TPS2049 power-distribution switch is intended for applications where heavy capacitive loads and short

circuits are likely to be encountered. This device incorporates a 600-m Ω N-channel MOSFET power switch for

power-distribution systems that require only one power distribution path. The 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 2.7V.

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 the switch remains off

until valid input voltage is present. This power-distribution switch is designed to set current limit at 150mA

typically.

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 (17 pages)

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TPS2049 www.ti.com......................................................................................................................................... SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007 SINGLE-CHANNEL 100 mA POWER SWITCH FEATURES 1 • • • • • • • • • 100-mA Continuous Current 600-mΩ High-Side MOSFET Thermal and Short-Circuit Protection Operating Range: 2.7 V to 5.5 V 0.
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TPS2049 SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007......................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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TPS2049 www.ti.com......................................................................................................................................... SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007 ELECTRICAL CHARACTERISTICS over recommended operating junction temperature range, VI(IN) = 5.5 V, IO = 90 mA, VI(EN) = 0 V (unless otherwise noted) TEST CONDITIONS (1) PARAMETER MIN TYP MAX UNIT POWER SWITCH rDS(on) Static drain-source on-state resistance, 5-V operation and 2.
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TPS2049 SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007......................................................................................................................................... www.ti.com FUNCTIONAL BLOCK DIAGRAM TERMINAL FUNCTIONS TERMINAL NAME EN1 GND NO.
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TPS2049 www.ti.com......................................................................................................................................... SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007 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 1.
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TPS2049 SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007......................................................................................................................................... www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) VI(EN) 5 V/div Enable Into a Short Watching OC Flag’s Delay VO(OUT1) 5 V/div Hotshort 5 Ω on Output Watch Current Limit Response Time. OC 200 ms/div IO(OUT1) 200 mA/div VI(OUT) 5 V/div t - Time - 2 ms/div t - Time - 2 ms/div Figure 4.
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TPS2049 www.ti.com......................................................................................................................................... SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007 APPLICATION INFORMATION 2,3 6,7,8 5 4 Figure 6. Typical Application POWER-SUPPLY CONSIDERATIONS A 0.01-µF to 0.1-µF ceramic bypass capacitor between IN and GND, close to the device, is recommended.
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TPS2049 SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007......................................................................................................................................... www.ti.com POWER DISSIPATION AND JUNCTION TEMPERATURE The low on-resistance on the n-channel MOSFET allows small surface-mount packages to pass large currents.
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TPS2049 www.ti.com......................................................................................................................................... SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007 GENERIC HOT-PLUG APPLICATIONS (see Figure 8) 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.
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TPS2049 SLVS713A – OCTOBER 2006 – REVISED SEPTEMBER 2007......................................................................................................................................... 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.
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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 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS2049DR Package Package Pins Type Drawing SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 6.4 B0 (mm) K0 (mm) P1 (mm) 5.2 2.1 8.0 W Pin1 (mm) Quadrant 12.
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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) TPS2049DR SOIC D 8 2500 340.5 338.1 20.
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