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1、PM7540? Power Management ICDevice Specification Preliminary Information80-VD691-1 Rev. BFebruary 26 2007Submit technical questions at:https:/QUALCOMM Confidential and ProprietaryRestricted Distribution. Not to be distributed to non-employees of QUALCOMM or its subsidiaries without theexpress approva
2、l of Configuration Management.Not to be used copied reproduced in whole or in part nor its contents revealed in any manner to others without theexpress written permission of QUALCOMM Incorporated.QUALCOMM is a registered trademark and registered service mark of QUALCOMM Incorporated. Other productan
3、d brand names may be trademarks or registered trademarks of their respective owners. CDMA2000 is a registeredcertification mark of the Telecommunications Industry Association used under license. ARM is a registeredtrademark of ARM Limited. QDSP is a registered trademark of QUALCOMM Incorporated in t
4、he United States andother countries.Export of this technology may be controlled by the United States Government. Diversion contrary to U.S. lawprohibited.QUALCOMM Incorporated5775 Morehouse DriveSan Diego CA 92121-1714U.S.A.Copyright ? 2006 2007 QUALCOMM Incorporated. All rights reserved.xingbo-2007
5、.06.03 at 20:47:18 PDT80-VD691-1 Rev. B2QUALCOMM Confidential and Proprietary1Introduction1.1Documentation overview.81.2Concise device description.91.3IC features.121.4Terms and acronyms.142Pin Definitions3Electrical Specifications3.1Absolute maximum ratings.283.2Recommended operating conditions.293
6、.3Power supply and digital logic characteristics.303.4Multipurpose pin specifications.313.5Input power management specifications.353.5.1External supply detection.353.5.2USB_VBUS power source.363.5.3Input circuit transistors.363.5.4Transistor drivers.383.5.5Voltage regulation VDD or VBAT.393.5.6Curre
7、nt regulation monitoring and over-current protection.403.5.7Pass transistor power limiting.403.5.8Main battery charging.413.5.9Coin cell charging.453.5.10Battery voltage alarm.463.5.11Under-voltage lockout.463.5.12Sudden momentary power loss.473.5.13VDD collapse protection.473.6Output voltage regula
8、tion specifications.483.6.1Reference circuit.503.6.2Switched-mode power supplies.503.6.3Linear regulators.543.7General housekeeping specifications.593.7.1Analog multiplexer with offset and scaling.593.7.2System clocks.623.7.3Real-time clock.653.7.4Buffered VREF outputs.66Contentsxingbo-2007.06.03 at 20:47:18 PDT80-VD691-1 Rev. B3QUALCOMM Confidential and ProprietaryPM7540? Power Management IC Device Specification Preliminary InformationContents3.7.5Over-temperature protection smart thermal control.663.8User interface specifications.663.8.1Current drivers.
