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LM25069 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM25069 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 30 page Power Good UVLO/EN OVLO PWR GND TIMER PGD OUT VIN SENSE GATE LM25069 VOUT VSYS LM25069 www.ti.com SNVS607D – FEBRUARY 2009 – REVISED DECEMBER 2010 LM25069 Positive Low Voltage Power Limiting Hot Swap Controller Check for Samples: LM25069 1 FEATURES 2 • Operating range: +2.9V to +17V • Programmable fault timer avoids nuisance trips • In-rush current limit for safe board insertion into live power sources • Active high open drain POWER GOOD output • Programmable maximum power dissipation in • Available in latched fault and automatic restart the external pass device versions • Adjustable current limit APPLICATIONS • Circuit breaker function for severe over- • Server Backplane Systems current events • Base Station Power Distribution Systems • Internal high side charge pump and gate driver for external N-channel MOSFET • Solid State Circuit Breaker • Adjustable under-voltage lockout (UVLO) and PACKAGE hysteresis • Adjustable over-voltage lockout (OVLO) and • MSOP-10 hysteresis • Initial insertion timer allows ringing and transients to subside after system connection DESCRIPTION The LM25069 positive hot swap controller provides intelligent control of the power supply voltage to the load during insertion and removal of circuit cards from a live system backplane or other "hot" power sources. The LM25069 provides in-rush current control to limit system voltage droop and transients. The current limit and power dissipation in the external series pass N-Channel MOSFET are programmable, ensuring operation within the Safe Operating Area (SOA). The POWER GOOD output indicates when the output voltage is within 1.3V of the input voltage. The input under-voltage and over-voltage lockout levels and hysteresis are programmable, as well as the initial insertion delay time and fault detection time. The LM25069-1 latches off after a fault detection, while the LM25069-2 automatically restarts at a fixed duty cycle. The LM25069 is available in a 10 pin MSOP package. Typical Application Figure 1. Positive Power Supply Control 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. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2009–2010, 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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