Features Input voltage range: 2.9V to 17V I 2C/SMBus interface and PMBus™ compliant command structure Programmable 25mV or 46mV current limit threshold Configurable circuit breaker protection for hard shorts Configurable under- and over-voltage lockouts with hysteresis Remote temperature sensing with programmable warning and shutdown thresholds Detection and notification of damaged MOSFET condition Real time monitoring of VIN, VOUT, IIN, PIN, VAUX with 12-bit resolution and 1 kHz sampling rate Current measurement accuracy: ±2.4% over temperature Power measurement accuracy: ±3.0% over temperature True input power measurement using simultaneous sampling of VIN and IIN accurately averages dynamic power readings Averaging of VIN, IIN, PIN, and VOUT over programmable interval ranging from 0.001 to 4 seconds Programmable WARN and FAULT thresholds with ^SMBA notification Blackbox capture of telemetry measurements and device status triggered by WARN or FAULT condition Full-featured application design and development GUI 24-lead LLP package Description The LM25066 combines a high performance hot-swap controller with a PMBus ™ compliant SMBus/I 2C interface to accurately measure, protect and control the electrical operating conditions of computing and storage blades connected to a backplane power bus. The LM25066 continuously supplies real-time power, voltage, current, temperature and fault data to the system management host via the SMBus interface. The LM25066 control block includes a unique hot-swap architecture that provides current and power limiting to protect sensitive circuitry during insertion of boards into a live system backplane, or any other "hot" power source. A fast acting circuit breaker prevents damage in the event of a short circuit on the output. The input under-voltage and over-voltage levels and hysteresis are configurable, as well as the insertion delay time and fault detection time. A temperature monitoring block on the LM25066 interfaces with a low-cost external diode for monitoring the temperature of the external MOSFET or other thermally sensitive components. The POWER GOOD output provides a fast indicator when the input and/or output voltages are outside their programmed range. LM25066 current measurement accuracy is ±2.4% over temperature. The LM25066 monitoring block computes both the real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) as well as the peak power. Accurate power averaging is accomplished by averaging the product of the input voltage and current. A black box (Telemetry/Fault Snapshot) function captures and stores telemetry data and device status in the event of a warning or a fault. Applications Server backplane systems Basestation power distribution systems Solid state circuit breaker

Also Recommended LM25066A▲ System Power Management And Protection IC With PMBus LM25069▲ Positive Low Voltage Power Limiting Hot Swap Controller LM5066▲ High Voltage System Power Management And Protection IC With PMBus Typical App Circuit (with ref des)

Typical Application click for larger image Typical App Circuit (with ref des)	Block Diagram click for larger image
Typical Performance click for larger image

Parameters / Values	LM25066	LM25066A	LM25069	LM5066
Input Min Voltage	2.9 Volt	2.9 Volt	2.9 Volt	10 Volt
Input Max Voltage	17 Volt	17 Volt	17 Volt	80 Volt
Fault Latch/Retry	latch-off/auto retry	latch-off/auto retry	latch-off/auto retry	latch-off/auto retry
PWRGD Output	active high	active high	active high	active high
In-Rush Current Limit	Active	Active	Active	Active
Active CurrentLimit	Yes	Yes	Yes	Yes
Comparator Current Limit	Yes	Yes	Yes	Yes
Overvoltage Protection	Yes	Yes	Yes	Yes
Power Limiting	Yes	Yes	Yes	Yes
Temperature Min	-40 deg C	-40 deg C	-40 deg C	-40 deg C
Temperature Max	125 deg C	125 deg C	85 deg C	125 deg C
RegType	Hot Swap Controller	Hot Swap Controller	Hot Swap Controller	Hot Swap Controller
PowerWise	Yes	Yes	No	Yes
Output Voltage Monitoring	Yes	Yes		Yes
Automotive	No	No		No

Datasheets

Title		Size	Date	Other Language
	LM25066 System Power Management and Protection IC with PMBus	1456 Kbytes	11-Jul-11	中文

Application Notes

Title		Size	Date	Other Language
	AN-2100: Application Note 2100 LM25066 Evaluation Board	3881 Kbytes	12-Jul-11
	AN-2186: Application Note 2186 Using the LM25066 in an Intel Node Manager 1.5 System	826 Kbytes	12-Sep-11
	AN-2187: Application Note 2187 Using the LM25066 in an Intel Node Manager 2.0 System	109 Kbytes	12-Sep-11
	AN-2160: Application Note 2160 LM5066 Evaluation Board	3220 Kbytes	2-Aug-11

Other Technical Documents

Title		Type	Date
	Comparing Hot Swap IC Solutions in Server Power Reporting (Part 1 of 2)	External Article	2011-06-10
	Comparing Hot Swap IC Solutions in Server Power Reporting (Part 2 of 2)	External Article	2011-06-09
	Current Sensing For Server Power Monitoring: MOSFET or Shunt?	External Article	2011-07-01
	TVS Clamping in Hot-Swap Circuits	External Article	2011-09-29

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM25066PSQ/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$2.45 each at 1K+ pcs	reel of 1000
LM25066PSQE/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 750 MOUSER Worldwide 248	$2.45 each at 1K+ pcs	reel of 250
LM25066PSQX/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$2.45 each at 1K+ pcs	reel of 4500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM25066.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM25066 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM25066EVK/NOPB	Evaluation Board for the LM25066	Full production Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 2	$95.00 each	1
Description: The LM25066EVM evaluation board provides the design engineer with a fully functional intelligent monitoring and protection controller board designed for positive voltage systems. Contents: LM25066 Evaluation Board with installed jumpers FTDI to 10 pin adaptor with installed FT4232 module USB to Mini B cable Software: Companion GUI for evaluation boards supporting: LM25066, LM5066, LM5064 Hot Swap + telemetry devices and the LM25056 telemetry-only device

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM25066PSQ/NOPB	52.754	LLP	24	3	260	Detail	N/A	N/A	NS UZXYTT L25066P
LM25066PSQE/NOPB		LLP	24	3	260	Detail	N/A	N/A	NS UZXYTT L25066P
LM25066PSQX/NOPB	52.754	LLP	24	3	260	Detail	N/A	N/A	NS UZXYTT L25066P

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM25066.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM25066 is located at RoHS Status.

Design Tools

Title	Size	Date
Companion GUI for evaluation boards supporting: LM25066 Hot Swap + telemetry devices

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM25066PSQ	PVIP050	0	14280	0	0	1755000	3	497986041
LM25066PSQE	PVIP050	0	14280	0	0	1755000	3	497986041
LM25066PSQX	PVIP050	0	14280	0	0	1755000	3	497986041

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM25066.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM25066 is located at RoHS Status.

LM25066 System Management & Protection IC Overview Loading video... LM5066/64 System Protection & Management with Hot Swap Controller Overview Loading video... LM5066/64 System Protection & Management with Hot Swap Controller Demo Loading video...

LM25066 System Management & Protection IC Overview Date: 2010-04-13 Length: 00:05:54 LM5066/64 System Protection & Management with Hot Swap Controller Overview Date: 2011-06-27 Length: 00:05:05 LM5066/64 System Protection & Management with Hot Swap Controller Demo Date: 2011-06-27 Length: 00:08:20