Data Sheet

LT9890

150 A Current Monitor for Intel Psys Applications

Rev. 0

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FEATURES

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Integrated current sense element

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150 A current range

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26,600:1 input-to-output current ratio (5 mA at 133 A)

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±1.3% TUE maximum (ISENSE = 45 A to 150 A)

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3.2 MHz small-signal bandwidth (ISENSE = 150 A)

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150 μΩ current path resistance

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Powered from 2.7 V to 65 V

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Intel Psys compatible

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Available in 108-terminal, 10 mm × 20 mm × 2.75 mm, LGA

package

APPLICATIONS

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Computers and network servers

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Intel central processing unit (CPU) motherboards

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Network storage

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Communication equipment

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Electric vehicles

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Photovoltaics

TYPICAL APPLICATION CIRCUIT

Figure 1. Typical Application Circuit

FUNCTIONAL BLOCK DIAGRAM

Figure 2. Functional Block Diagram (RS Is the Sense Resistor, and RG Is the

Gain Resistor.)

GENERAL DESCRIPTION

The LT9890 is a high-precision current monitor with an internal

current-sense element supporting up to 150 A of load current.

Factory calibration of the current-sense element and a zero tem-

perature coefficient architecture results in less than 1.3% total

unadjusted error (TUE). A 26,600:1 input-to-output current ratio with

a response bandwidth greater than 3 MHz provides a fast and

accurate ground-referenced output signal while being insensitive to

ground voltage variations. Minimal power loss is achieved through a

low, 150 μΩ current-path resistance and an aspect ratio conducive

to wide printed circuit board (PCB) traces. Input voltages from 2.7 V

to 65 V are supported. The LT9890 is compatible with the Intel Psys

(platform power) applications.

Figure 3. Output Current (IOUT) TUE vs. IIN