Switches. TPS22942 Datasheet

TPS22942 Datasheet PDF


Part

TPS22942

Description

Low-input-voltage Current-limited Load Switches

Manufacture

etcTI

Page 24 Pages
Datasheet
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TPS22942 Datasheet
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TPS22941, TPS22942, TPS22943, TPS22944, TPS22945
SLVS832D – NOVEMBER 2008 – REVISED JULY 2014
TPS2294x Low-input-voltage Current-limited Load Switches With Shut Off And Auto-
Restart Feature
1 Features
1 Input Voltage Range: 1.62 V to 5.5 V
• Low ON resistance
– rON = 0.4 at VIN = 5.5 V
– rON = 0.5 at VIN = 3.3 V
– rON = 0.6 at VIN = 2.5 V
– rON = 0.8 at VIN = 1.8 V
• Minimum Current Limit: 40 mA or 100 mA
• Undervoltage Lockout (UVLO)
• Thermal Shutdown
• Shutdown Current < 1 μA
• Fast Current Limit Response Time
• Fault Blanking
• Auto Restart
• 1.8-V Compatible Control Input Thresholds
• ESD Performance Tested Per JESD 22
– 4000-V Human-Body Model
(A114-B, Class II)
– 1000-V Charged-Device Model (C101)
• Tiny SC-70 (DCK) Package
• UL Recognized Component (UL File 169910)
• Evaluated to IEC 60950-1, Ed 2, Am1, Annex CC,
Test Program 2 with CB Report
2 Applications
• Low-Current Sensor Protection
• HDMI Connector Protection
• Notebooks
• PDAs
• GPS Devices
• MP3 Players
• Peripheral Ports
3 Description
The TPS22941/2/3/4/5 load switches provide
protection to systems and loads in high-current
conditions. The devices contain a 0.4-current-
limited P-channel MOSFET that can operate over an
input voltage range of 1.62 V to 5.5 V. Current is
prevented from flowing when the MOSFET is off. The
switch is controlled by an on/off input (ON), which is
capable of interfacing directly with low-voltage control
signals. The TPS22941/2/3/4/5 includes thermal
shutdown protection that prevents damage to the
device when a continuous over-current condition
causes excessive heating by turning off the switch.
These devices provide an integrated, robust solution
to provide current limiting the output current to a safe
level by switching into a constant-current mode when
the ouptut load exceeds the current-limit threshold.
The OC logic output asserts low during overcurrent,
undervoltage, or overtemperature conditions. These
additional features make the TPS22941/2/3/4/5 an
ideal solution for applications where current limiting is
necessary.
This family of devices are available in a SC70-5
(DCK) package. It is characterized for operation over
the free-air temperature range of –40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS22941
TPS22942
TPS22943
SC70 (5)
2.00mm × 2.10 mm
TPS22944
TPS22945
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
1.0
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)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS22942 Datasheet
TPS22941, TPS22942, TPS22943, TPS22944, TPS22945
SLVS832D – NOVEMBER 2008 – REVISED JULY 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 3
7.1 Absolute Maximum Ratings ..................................... 3
7.2 Handling Ratings....................................................... 3
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 4
7.6 Switching Characteristics .......................................... 5
7.7 Typical Characteristics .............................................. 6
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................... 9
8.4 Device Functional Modes........................................ 10
9 Application and Implementation ........................ 11
9.1 Application Information............................................ 11
9.2 Typical Application ................................................. 11
10 Power Supply Recommendations ..................... 15
11 Layout................................................................... 15
11.1 Layout Guidelines ................................................. 15
11.2 Layout Example .................................................... 15
11.3 Thermal Considerations ........................................ 16
12 Device and Documentation Support ................. 17
12.1 Related Links ........................................................ 17
12.2 Trademarks ........................................................... 17
12.3 Electrostatic Discharge Caution ............................ 17
12.4 Glossary ................................................................ 17
13 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
Changes from Revision C (November 2009) to Revision D
Page
• Added Handling Rating table, Feature Description section, Device Functional Modes, Application and
Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section ............................................................... 1
2 Submit Documentation Feedback
Copyright © 2008–2014, Texas Instruments Incorporated
Product Folder Links: TPS22941 TPS22942 TPS22943 TPS22944 TPS22945


Features Datasheet pdf Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS22941, TPS22942, TPS22943 , TPS22944, TPS22945 SLVS832D – NOVEM BER 2008 – REVISED JULY 2014 TPS2294x Low-input-voltage Current-limited Load Switches With Shut Off And AutoRestart Feature 1 Features •1 Input Voltage Range: 1.62 V to 5.5 V • Low ON resi stance – rON = 0.4 Ω at VIN = 5.5 V – rON = 0.5 Ω at VIN = 3.3 V – r ON = 0.6 Ω at VIN = 2.5 V – rON = 0 .8 Ω at VIN = 1.8 V • Minimum Curre nt Limit: 40 mA or 100 mA • Undervolt age Lockout (UVLO) • Thermal Shutdown • Shutdown Current < 1 μA • Fast Current Limit Response Time • Fault B lanking • Auto Restart • 1.8-V Comp atible Control Input Thresholds • ESD Performance Tested Per JESD 22 – 400 0-V Human-Body Model (A114-B, Class II) – 1000-V Charged-Device Model (C101) • Tiny SC-70 (DCK) Package • UL Re cognized Component (UL File 169910) • Evaluated to IEC 60950-1, Ed 2, Am1, Annex CC, Test Program 2 with CB Report 2 Applications • Low-Current Sensor Pr.
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