MAX4376/MAX4377/ MAX4378 Single/Dual/Quad, High-Side Current-Sense Amplifiers with Internal Gain General Description Features The MAX4376/MAX4377/MAX4378 single, dual, and Low-Cost, Single/Dual/Quad, High-Side Current- quad precision high-side current-sense amplifiers are Sense Amplifiers available in space-saving packages. They feature 0.5% Typical Full-Scale Accuracy buffered voltage outputs that eliminate the need for +3V to +28V Supply Operation gain-setting resistors and are ideal for todays notebook Adjustable Current-Sense Capability with External computers, cell phones, and other systems where cur- Sense Resistor rent monitoring is critical. These precision devices are Buffered Output Voltage with 2mA Drive offered in three fixed-gain versions of 20, 50, and 100: 1mA (typ) Supply Current GAIN SUFFIX 2.0MHz Bandwidth (Gain = +20V/V) 20 T Automotive Temperature Range (-40C to +125C) 50 F High Accuracy +2V to +28V Common-Mode 100 H Range, Functional Down to 0V, Independent of Supply Voltage For example, MAX4376TAUK is a single high-side amplifier with a gain of 20. Three Gain Versions Available +20V/V (MAX437 T) High-side current monitoring is especially useful in bat- +50V/V (MAX437 F) tery-powered systems since it does not interfere with +100V/V (MAX437 H) the ground path of the battery charger. The input com- Available in Space-Saving 5-Pin SOT23 (Single), mon-mode range of 0 to +28V is independent of the 8-Pin MAX (Dual), and 14-Pin TSSOP (Quad) supply voltage and ensures that the current-sense feedback remains viable even when connected to a Ordering Information battery pack in deep discharge. The full-scale current reading can be set by choosing GAIN TEMP PIN- TOP PART the appropriate voltage gain and external-sense resis- (+V/V) RANGE PACKAGE MARK tor. This capability offers a high level of integration and MAX4376 T AUK+T 20 -40C to +125C 5 SOT23 ADOG flexibility, resulting in a simple and compact current- MAX4376TAUK/V+T 20 -40C to +125C 5 SOT23 sense solution. MAX4376FAUK+T 50 -40C to +125C 5 SOT23 ADOH The MAX4376/MAX4377/MAX4378 operate over a sup- MAX4376HAUK+T 100 -40C to +125C 5 SOT23 ADOI ply voltage range of +3V to +28V, draw 1mA of supply M AX4376H A U K/V+ T 100 -40C to +125C 5 SOT23 AFGO current per amplifier, and operate over the full automo- MAX4376TASA+ 20 -40C to +125C8 SO tive temperature range of -40C to +125C. These MAX4376FASA+ 50 -40C to +125C8 SO devices have a wide bandwidth of 2MHz, making them MAX4376HASA+ 100 -40C to +125C8 SO suitable for use inside battery-charger control loops. The buffered outputs drive up to 2mA of output current Ordering Information continued at end of data sheet. into a ground-referenced load. +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. The MAX4376 is available in a tiny 5-pin SOT23 pack- T = Tape and reel. age. The MAX4377/MAX4378 are available in space- saving 8-pin MAX and 14-pin TSSOP packages, Pin Configurations respectively. Applications TOP VIEW + Notebook Computers Portable/Battery-Powered OUT 1 5 RS- Systems Current-Limited Power Supplies Cell Phones MAX4376 GND 2 Fuel Gauges in PC Smart Battery Packages General-System/Board- Automotive Current Detect Level Current Monitoring V34 RS+ Power Management CC Battery Chargers Systems PA Bias Control SOT23 Pin Configurations continued at end of data sheet. MAX is a registered trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-1781 Rev 7 10/12MAX4376/MAX4377/MAX4378 Single/Dual/Quad, High-Side Current-Sense Amplifiers with Internal Gain ABSOLUTE MAXIMUM RATINGS V , RS+, RS- to GND ...........................................-0.3V to +30V 8-Pin SO (derate 5.88mW/C above +70C)................471mW CC OUT to GND ...............................................-0.3V to (V + 0.3V) 14-Pin SO (derate 8.33mW/C above +70C)..............667mW CC Differential Input Voltage (V - V ).................................8V 14-Pin TSSOP (derate 9.1mW/C above +70C) .........727mW RS+ RS- Output Short Circuit to V ........................................Continuous Operating Temperature Range .........................-40C to +125C CC Output Short Circuit to GND.....................................................1s Junction Temperature......................................................+150C Current into Any Pin..........................................................20mA Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW Soldering Temperature (reflow) .......................................+260C 8-Pin MAX (derate 4.5mW/C above +70C) .............362mW 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 = (V - V ) = 0V, V = +3.0V to +28V, R = , T = T to T unless otherwise noted. Typical RS+ SENSE RS+ RS- CC L A MIN MAX, values are at 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 Guaranteed by total OUT voltage error test 0 28 V CM Common-Mode Rejection CMR 2V V 28V, V = 100mV 90 dB RS+ SENSE Supply Current per Amplifier I V = 5mV, V > 2.0V, V = 12V 1 2.2 mA CC SENSE RS+ CC Leakage Current I , I V = 0V, V = 28V 8 A RS+ RS- CC RS+ V > 2.0V 0 60 RS+ I RS + V 2.0V -400 60 RS+ Input Bias Current A V > 2.0V 0 120 RS+ I RS- V 2.0V -800 120 RS+ Full-Scale Sense Voltage V 150 mV SENSE V = 100mV, SENSE 6.75 V = 12V, V = 12V CC RS+ V = 100mV, SENSE V = 12V, T = +25C, 0.5 3.25 CC A V = 12V RS+ V = 100mV, SENSE 11 V = 28V, V = 28V CC RS+ Total OU T V ol ta ge E r r or ( N ote 2) I 2mA % OUT V = 100mV, SENSE V = 28V, V = 28V, 0.5 5 CC RS+ T = +25C A V = 100mV, SENSE 9 32 V = 12V, V = 0.1V CC RS+ V = 6.25mV, SENSE V = 12V, V = 12V 7 CC RS+ (Note 3) OUT High Voltage (Note 4) (V - V ) V = 3V, I = 2mA, V = 28V 0.9 1.2 V C C OUT CC OUT RS+ I = 200A, V = V = 12V, OUT CC RS+ OUT Low Voltage V 25 40 mV OL V = 0V, T = +25C SENSE A Maxim Integrated 2