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TPS2055B Datasheet(PDF) 1 Page - Texas Instruments |
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TPS2055B Datasheet(HTML) 1 Page - Texas Instruments |
1 / 30 page D-16 D-8 DBV-5 1 FEATURES APPLICATIONS EN1 EN3 EN † EN2 NC OC3 NC OUT3 TPS2047B DPACKAGE (TOP VIEW) NC GND GND GND GND IN OUT IN1 IN2 TPS2045B/TPS2055B DPACKAGE (TOP VIEW) TPS2045B/TPS2055B DBVPACKAGE (TOP VIEW) OC OUT OUT OC Allenableinputsareactivehigh fortheTPS2055B. † (EN) NC-NoConnection OC1 OC2 OUT1 OUT2 EN1 IN EN2 GND IN TPS2046B DPACKAGE (TOP VIEW) OC1 OC2 EN † OUT1 OUT2 IN OUT DESCRIPTION TPS2045B, TPS2055B TPS2046B, TPS2047B SLVS532C – JULY 2004 – REVISED OCTOBER 2007 www.ti.com CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES • Heavy Capacitive Loads • 70-mΩ High-Side MOSFET • Short-Circuit Protections • 250-mA Continuous Current • Thermal and Short-Circuit Protection • Accurate Current Limit (0.3 A min, 0.7 A max) • Operating Range: 2.7 V to 5.5 V • 0.6-ms Typical Rise Time • Undervoltage Lockout • Deglitched Fault Report (OC) • No OC Glitch During Power Up • Maximum Standby Supply Current: 1- μA (Single and Dual) or 2-μA (Triple) • Bidirectional Switch • Ambient Temperature Range: –40°C to 85°C • ESD Protection • UL Pending The TPS204xB/TPS2055B power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 70-m Ω 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 (OCx) 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 0.5 A typically. 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. UNLESS OTHERWISE NOTED this document contains Copyright © 2004–2007, Texas Instruments Incorporated PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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