LT9890 (Rev.A)
Document overview
- Manufacturer or author: Analog Devices, Inc.
- PDF pages: 11
Technical content
150 A Current Monitor for Intel Psys Applications
Rev. A DOCUMENT FEEDBACK TECHNICAL SUPPORT Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
FEATURES
►Integrated current sense element ►150 A current range ►26,600:1 input-to-output current ratio (5 mA at 133 A) ►±1.3% TUE maximum (ISENSE = 45 A to 150 A) ►3.2 MHz small-signal bandwidth (ISENSE = 150 A) ►150 μΩ current path resistance ►Powered from 2.7 V to 65 V ►Intel Psys compatible ►Available in 108-terminal, 10 mm × 20 mm × 2.75 mm, LGA package
APPLICATIONS
►Computers and network servers ►Intel central processing unit (CPU) motherboards ►Network storage ►Communication equipment ►Electric vehicles ►Photovoltaics TYPICAL APPLICATION CIRCUIT Figure 1. Typical Application Circuit Figure 2. Functional Block Diagram (RS Is the Sense Resistor, and RG Is the current-sense element supporting up to 150 A of load current. (platform power) applications. Figure 3. Output Current (IOUT) TUE vs. IIN
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REVISION HISTORY
2/2024—Rev. 0 to Rev. A 7/2023—Revision 0: Initial Version
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ELECTRICAL CHARACTERISTICS
The operating voltage range (VIP) = 12 V, the current from IP to IM (ISENSE) = 100 A, and the output resistor (ROUT) = 200 Ω, unless otherwise noted. All currents into the device pins are positive, and all currents out of the device pins are negative. All voltages are referenced to GND, unless otherwise noted. Table 1. Electrical Characteristics 1 Use the recommended PCB layout. See the Figure 17 for further details. The current path resistance has a 3900 ppm temperature coefficient. 2 The CMRR is equal to (ROUT ΔV/IP ΔV)/(Averaged ROUT Voltage/Input Current, IIN, x Shunt Resistance, RSHUNT). ROUT is 200 Ω on the tester.
Table 2. Absolute Maximum Ratings 1 RMS current must not exceed 150 A in any 1 second period. 2 If IP is greater than 50 V, do not pull IOUT less than −0.3 V. ing conditions for extended periods may affect product reliability. Table 3. Thermal Resistance 1 Values determined per JEDEC 51-9 and JEDEC 51-12. damage may occur on devices subjected to high energy ESD. performance degradation or loss of functionality.
Figure 4. Pin Configuration Table 4. Pin Function Descriptions Pin 1 to Pin 36 and Pin 97 to Pin 102 IM Negative Current Input. Tie all 42 IM pins together. Pin 37 to Pin 38, Pin 42, Pin 47 to Pin 48, and Pin 85 to Pin 96GND Ground. Pin 43 IOUT Output Current. Proportional to the current flowing from IP to IM. Pin 49 to Pin 84 and Pin 103 to Pin 108 IP Positive Current Input. Tie all 42 IP pins together.
150 A flows from the IP pin to the IM pin through an internal copper
factory trim corrects for the copper-sense element nonidealities. current has an insignificant effect on the TUE. Figure 15. Typical Application
Table 5. Related Parts
registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887-2356, U.S.A. Figure 18. 108-Terminal Land Grid Array [LGA] 1 The LT9890AV#PBF is a RoHS compliant part.