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TPS22944DCKR Datasheet(PDF) 1 Page - Texas Instruments |
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TPS22944DCKR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 19 page 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 1 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 – rON = 0.4 Ω at VIN = 5.5 V devices contain a 400-m Ω current-limited P-channel – rON = 0.5 Ω at VIN = 3.3 V MOSFET that can operate over an input voltage – rON = 0.6 Ω at VIN = 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 – rON = 0.8 Ω at VIN = 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 1 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. Copyright © 2008–2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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