MAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier General Description Features The MAX4173 low-cost, precision, high-side current- Low-Cost, Compact Current-Sense Solution sense amplifier is available in a tiny SOT23-6 package. High Accuracy +2V to +28V Common-Mode It features a voltage output that eliminates the need for Range, Functional Down to 0V, Independent of gain-setting resistors and it is ideal for todays notebook computers, cell phones, and other systems where cur- Supply Voltage rent monitoring is critical. High-side current monitoring Three Gain Versions Available is especially useful in battery-powered systems, since it +20V/V (MAX4173T) does not interfere with the ground path of the battery +50V/V (MAX4173F) charger. The input common-mode range of 0 to +28V is independent of the supply voltage and ensures that the +100V/V (MAX4173H) current-sense feedback remains viable even when con- 0.5% Full-Scale Accuracy nected to a battery in deep discharge. The MAX4173s wide 1.7MHz bandwidth makes it suitable for use inside 3mV Input Offset Voltage (MAX4173T) battery charger control loops. Wide 1.7MHz Bandwidth (MAX4173T) The combination of three gain versions and a user- 420A Supply Current selectable external sense resistor sets the full-scale current reading. This feature offers a high level of inte- Available in Space-Saving SOT23 Package gration, resulting in a simple and compact current- sense solution. The MAX4173 operates from a single +3V to +28V sup- Typical Operating Circuit ply, typically draws only 420A of supply current over the extended operating temperature range (-40C to I +85C), and is offered in the space-saving SOT23 LOAD V SENSE 0 TO +28V package. R SENSE Applications RS+ RS- +3V TO +28V Notebook Computers V CC Portable/Battery-Powered Systems 0.1F Smart Battery Packs/Chargers Functional Diagrams MAX4173T/F/H Cell Phones Power-Management Systems A/D LOAD/ OUT CONVERTER BATTERY General System/Board-Level Current Monitoring GND PA Bias Control Precision Current Sources Ordering Information PART GAIN (V/V) TEMP RANGE PIN-PACKAGE SOT TOP MARK MAX4173TEUT+T 20 -40C to +85C 6 SOT23 AABN MAX4173TESA+ 20 -40C to +85C 8 SO MAX4173FEUT+T 50 -40C to +85C 6 SOT23 AABO MAX4173FESA+ 50 -40C to +85C 8 SO MAX4173HEUT+T 100 -40C to +85C 6 SOT23 AABP MAX4173HESA+ 100 -40C to +85C 8 SO Pin Configurations appear at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. Functional Diagrams continued at end of data sheet. T = Tape and reel. UCSP is a trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct 19-1434 Rev 5 4/11 at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com. AVAILABLEMAX4173 Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier ABSOLUTE MAXIMUM RATINGS V , RS+, RS- to GND .......................................... -0.3V to +30V Continuous Power Dissipation (T = +70C) CC A OUT to GND .............................................. -0.3V to (V + 0.3V) 8-Pin SO (derate 5.88mW/C above +70C)............... 471mW CC Output Short-Circuit to V or GND ......................... Continuous SOT23-6 (derate 8.7mW/C above +70C)................. 696mW CC Differential Input Voltage (V - V ) ............................. 0.3V Operating Temperature Range .......................... -40C to +85C RS+ RS- Current into Any Pin......................................................... 20mA Storage Temperature Range ............................ -65C to +150C Lead Temperature (soldering, 10s) ................................ +300C Soldering Temperature (reflow) ...................................... +260C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 0 to +28V, V = +3V to +28V, V = 0V, T = T to T , R = unless otherwise noted. Typical values are at RS+ CC SENSE A MIN MAX LOAD T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range V Guaranteed by PSR test 3 28 V CC Common-Mode Input Range V (Note 2) 0 28 V CMR Common-Mode Rejection CMR V > +2.0V 90 dB RS+ Supply Current I V > +2.0V, V > 12V 0.42 1.0 mA CC RS+ CC Leakage Current I , I V = 0V, V = 28V 0.3 3 A RS+ RS- CC RS+ V > +2.0V 0 50 RS+ I RS+ V +2.0V -350 50 RS+ Input Bias Current A V > +2.0V 0 100 RS+ I RS- V +2.0V -700 100 RS+ Full-Scale Sense Voltage V V = V - V 150 mV SENSE SENSE RS+ RS- V = +100mV, V = +12V, V = +12V 0.5 5.75 SENSE CC RS+ V = +100mV, V = +12V, V = +12V, SENSE CC RS+ 0.5 3.25 T = +25C A Total OUT Voltage Error V = +100mV, V = +28V, V = +28V 0.5 5.75 % SENSE CC RS+ (Note 3) V = +100mV, V = +12V, V = +0.1V -9 24 SENSE CC RS+ V = +12V, V = +12V, V = +6.25mV CC RS+ SENSE 7.5 (Note 4) MAX4173T, V = +3.0V, V = 28V, CC RS+ 0.8 1.2 V = 250mV SENSE MAX4173F, V = +7.5V, V = 28V, CC RS+ Out High Voltage (Note 5) (V - V ) 0.8 1.2 V CC OH V = 250mV SENSE MAX4173H, V = +15V, V = 28V, CC RS+ 0.8 1.2 V = 250mV SENSE MAX4173TEUT, T = +25C 1.2 5 A OUT Low Voltage V V = +5V, V = 0.89V, mV OL CC RS+ T = -40C to +85C 40 V = 0mV A SENSE 2 Maxim Integrated