EVALUATION KIT AVAILABLE Low-Cost, Micropower, High-Side MAX4373/MAX4374/MAX4375 Current-Sense Amplifier + Comparator + Reference ICs General Description Benefits and Features The MAX4373/MAX4374/MAX4375 low-cost, micropow- Integrated Current-Sensing Solution Simplifies High- er, high-side current-sense supervisors contain a high- Side Current Monitoring side current-sense amplifier, bandgap reference, and Current-Sense Amplifier plus Internal Comparator comparator with latching output. They feature a voltage and Bandgap Reference with Improved Accuracy output that eliminates the need for gain-setting resistors, 1mV (max) Input Offset Voltage making them ideal for todays notebook computers, cell 2% (max) Full-Scale Accuracy phones, and other systems where battery/DC current Internal Bandgap Reference (1.6% Accuracy) monitoring is critical. High-side current monitoring is High Accuracy +2V to +28V Common-Mode Range, especially useful in battery-powered systems since it Functional Down to 0V, Independent of Supply does not interfere with the ground path of the battery Voltage Ensures Current Monitoring Even In Deep charger. The 0 to +28V input common-mode range is Discharge of Battery Pack independent of the supply voltage, which ensures that the current-sense feedback remains viable even when Low Power Consumption Extends Battery Life connected to a battery pack in deep discharge. 50A Supply Current Single +2.7V to +28V Operating Supply The comparator output of the MAX4373/MAX4374/ MAX4375 is latched to provide a turn-off flag that Latching Comparator Output Eliminates Oscillation doesnt oscillate. In addition, the MAX4374/MAX4375 Three Gain Versions (+20V/V, +50V/V, contain a second comparator for use in window-detec- +100V/V) Support Different Size Battery Packs tion functions. The MAX4373/MAX4374/MAX4375 are available in three different gain versions (T = +20V/V, Ordering Information F = +50V/V, H = +100V/V) and use an external sense PIN- GAIN resistor to set the sensitivity of the input voltage to the PART TEMP RANGE PACKAGE (V/V) load current. These features offer a high level of inte- gration, resulting in a simple and compact current- MAX4373TEUA+ -40C to +85C 8 MAX +20 sense solution. MAX4373TESA+ -40C to +85C 8 SO +20 The MAX4373/MAX4374/MAX4375 operate from a sin- MAX4373FEUA+ -40C to +85C 8 MAX +50 gle +2.7V to +28V supply and consume 50A. They are MAX4373FESA+ -40C to +85C 8 SO +50 specified for the extended operating temperature range MAX4373HEUA+ -40C to +85C 8 MAX +100 (-40C to +85C) and are available in 8-pin and 10-pin MAX4373HESA+ -40C to +85C 8 SO +100 MAX packages. +Denotes a lead(Pb)-free/RoHS-compliant package. Applications Ordering Information continued at end of data sheet. Notebook Computers Typical Operating Circuit Portable/Battery-Powered Systems I LOAD + V - SENSE Smart Battery Packs/Chargers V = 0 TO 28V IN R SENSE Cell Phones LOAD/ RS+ RS- Power-Management Systems BATTERY V = 2.7V TO 28V V CC CC General-System/Board-Level Current Monitoring C1 0.1F MAX4373 Precision Current Sources OUT V PULL-UP R1 (UP TO 5V) R3 CIN COUT R2 RESET MAX is a registered trademark of Maxim Integrated Products, Inc. GND Pin Configurations appear at end of data sheet. 19-1630 Rev 5 5/15Low-Cost, Micropower, High-Side MAX4373/MAX4374/MAX4375 Current-Sense Amplifier + Comparator + Reference ICs 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 the lesser of 8-Pin MAX (derate 4.1mW/C above +70C) .............330mW (V + 0.3V) or +15V 8-Pin SO (derate 5.9mW/C above +70C)..................471mW CC CIN1, CIN2, RESET to GND ........................-0.3V to the lesser of 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW (V + 0.3V) or +12V 14-Pin SO (derate 8.3mW/C above +70C)................667mW CC Differential Input Voltage (V + - V -)..............................0.3V Operating Temperature Range ...........................-40C to +85C RS RS COUT1, COUT2 to GND........................................-0.3V to +6.0V Junction Temperature......................................................+150C Current into Any Pin..........................................................10mA 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 = +2.7V to +28V, V = 0 to +28V, V = 0V, V = 0V, R = 1M, T = T to T , unless otherwise noted. CC RS+ SENSE RESET LOAD A MIN MAX Typical values are at T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range V 2.7 28 V CC (Note 2) Common-Mode Input Range V 028 V CMR (Note 3) Common-Mode Rejection CMR V > 2V 85 dB RS+ Supply Current I V > 2V, V = 5mV 50 100 A CC RS+ SENSE Leakage Current I I V = 0V, V = 28V 0.015 0.5 A RS+, RS- CC RS+ V > 2V 0 2.5 RS+ I RS+ V 2V -25 2.0 RS+ Input Bias Current A V > 2V 04 RS+ I RS- V 2V -50 4 RS+ Gain = +20V/V, +50V/V, V = 12V 150 170 Full-Scale Sense Voltage RS+ V mV SENSE (Note 4) Gain = +100V/V, V = 12V 100 120 RS+ T = +25C 0.1 1 V = V = 12V A CC RS+ Input Offset Voltage V mV OS (Note 11) T = T to T 2 A MIN MAX T = +25C 0.30 2 V = 12V, A CC V = 12V RS+ T = T to T 3 A MIN MAX V = SENSE 100mV T = +25C 0.35 2 A V = 28V, CC Total OUT Voltage Error (Note 6) V = 28V RS+ V T = T to T 3 % OUT A MIN MAX (Note 5) V = 12V, V = 0.1V 5.0 CC RS+ V = 6.25mV, V = 12V, SENSE CC 5.0 V = 12V (Note 7) RS+ I = 10A 2.5 OUT V = 2.7V, CC OUT Voltage Low V mV OUT V = 12V RS+ I = 100A 8.5 65 OUT V CC - OUT Voltage High V = 2.7V, I = -500A, V = 12V 0.25 V CC OUT RS+ V OH www.maximintegrated.com Maxim Integrated 2