Max4173F General Description

Features :

`Low-Cost, Compact Current-Sense Solution
`Wide 0 to +28V Common-Mode Range
  Independent of Supply Voltage
`Three Gain Versions Available
  +20V/V (MAX4173T)
  +50V/V (MAX4173F)
  +100V/V (MAX4173H)
`±0.5% Full-Scale Accuracy
`420A Supply Current
`Wide 1.7MHz Bandwidth (MAX4173T)
`+3V to +28V Operating Supply
`Available in Space-Saving SOT23-6 Package

Application

·Notebook Computers
·Portable/Battery-Powered Systems
·Smart Battery Packs/Chargers
·Cell Phones
·Power-Management Systems
·General System/Board-Level Current Monitoring
·PA Bias Control
·Precision Current Sources

Pin out

Specification

V_CC, RS+, RS- to GND ......................................... -0.3V to +30V
OUT to GND ............................................. -0.3V to (V_CC + 0.3V)
Output Short-Circuit to V_CC or GND ........................ Continuous
Differential Input Voltage (V_RS+ - V_RS-) ......................... ±0.3V
Current into Any Pin....................................................... ±20mA
Continuous Power Dissipation (T_A = +70)
8-Pin SO (derate 5.88mW/ above +70).................... 471mW
SOT23-6 (derate 8.7mW/ above +70)...................... 696mW
Operating Temperature Range ........................... -40 to +85
Storage Temperature Range ............................ -65 to +150
Lead Temperature (soldering, 10sec) ............................ +300

Specification

The MAX4173F low-cost, precision, high-side currentsense amplifier is available in a tiny SOT23-6 package. It features a voltage output that eliminates the need for gain-setting resistors and it is ideal for today's notebook computers, cell phones, and other systems where current monitoring is critical. High-side current monitoring is especially useful in battery-powered systems, since it does not interfere with the ground path of the battery charger. The input common-mode range of 0 to +28V is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a battery in deep discharge. The MAX4173F's wide 1.7MHz bandwidth makes it suitable for use inside battery charger control loops.

The combination of three gain versions and a userselectable external sense resistor sets the full-scale current reading. This feature of MAX4173F offers a high level of integration, resulting in a simple and compact currentsense solution.

The MAX4173F operates from a single +3V to +28V supply, typically draws only 420A of supply current over the extended operating temperature range (-40 to +85), and is offered in the space-saving SOT23-6 package.