MAX4372T/F/H Low-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output General Description Features The MAX4372 low-cost, precision, high-side current- Low-Cost, Compact Current-Sense Solution sense amplifier is available in a tiny, space-saving 30A Supply Current SOT23 5-pin package. Offered in three gain versions 2.7V to 28V Operating Supply (T = 20V/V, F = 50V/V, and H = 100V/V), this device oper- 0.18% Full-Scale Accuracy ates from a single 2.7V to 28V supply and consumes only 30A. It features a voltage output that eliminates the need 0.3mV Input Offset Voltage for gain-setting resistors and is ideal for todays notebook Low 1.5 Output Impedance computers, cell phones, and other systems where battery/ Three Gain Versions Available DC current monitoring is critical. 20V/V (MAX4372T) High-side current monitoring is especially useful in bat- 50V/V (MAX4372F) tery-powered systems since it does not interfere with the 100V/V (MAX4372H) ground path of the battery charger. The input common- High Accuracy +2V to +28V Common-Mode Range, mode range of 0 to 28V is independent of the supply volt- Functional Down to 0V, Independent of Supply age and ensures that the current-sense feedback remains Voltage viable even when connected to a 2-cell battery pack in deep discharge. Available in a Space-Saving 5-Pin SOT23 Package and 3 x 2 UCSP (1mm x 1.5mm) Package The user can set the full-scale current reading by choos- ing the device (T, F, or H) with the desired voltage gain Ordering Information and selecting the appropriate external sense resistor. TEMP PIN- TOP This capability offers a high level of integration and flex- PART RANGE PACKAGE MARK ibility, resulting in a simple and compact current-sense solution. For higher bandwidth applications, refer to the MAX4372TEUK+T -40C to +85C 5 SOT23 ADIU MAX4173T/F/H data sheet. MAX4372TESA+ -40C to +85C 8 SO MAX4372TEBT+T -40C to +85C 3 x 2 UCSP ACX Applications +Denotes lead(Pb)-free/RoHS-compliant package. Power-Management Systems T = Tape and reel. General-System/Board-Level Current Monitoring *Note: Gain values are as follows: 20V/V for the T version, Notebook Computers 50V/V for the F version, and 100V/V for the H version. Portable/Battery-Powered Systems Ordering Information appears at end of data sheet. Smart-Battery Packs/Chargers Cell Phones Typical Operating Circuit Precision-Current Sources I LOAD Pin Configurations GND RS- TOP VIEW TOP VIEW MAX4372T (BUMPS ON BOTTOM) MAX4372F 1 2 3 LOAD/ A/D MAX4372H R V SENSE SENSE OUT BATTERY GND 1 5 RS- CONVERTER V GND OUT A CC MAX4372T MAX4372F V OUT 2 CC MAX4372T MAX4372H +2.7V TO +28V V RS+ CC MAX4372F B RS- RS+ MAX4372H 0.1F V CC 3 4 RS+ V IN 0 TO 28V UCSP SOT23 UCSP is a trademark of Maxim Integrated Products, Inc. Pin Configurations continued at end of datasheet. 19-1548 Rev 5 5/11MAX4372T/F/H Low-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output Absolute Maximum Ratings V , RS+, RS- to GND .........................................-0.3V to +30V Operating Temperature Range ........................... -40C to +85C CC OUT to GND ..........................................................-0.3V to +15V Storage Temperature Range ............................ -65C to +150C Differential Input Voltage (V - V ) .............................0.3V Lead Temperature (soldering, 10s) .................................+300C RS+ RS- Current into Any Pin .........................................................10mA Soldering Temperature (reflow) .......................................+260C Continuous Power Dissipation (T = +70C) A 5-Pin SOT23 (derate 3.9mW/C above +70C) .......312.6mW 8-Pin SO (derate 7.4mW/C above +70C) ..............588.2mW 3 x 2 UCSP (derate 3.4mW/C above +70C) .........273.2mW 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 = 2.7V to 28V, V = 0V, R = 1M, T = T to T , unless otherwise noted. Typical values are RS+ CC SENSE LOAD A MIN MAX 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 0 28 V CMR (Note 3) Common-Mode Rejection CMR V > 2V 85 dB RS+ Supply Current I V > 2V, V = 5mV 30 60 A CC RS+ SENSE Leakage Current I , I V = 0V, V = 28V 0.05 1.2 A RS+ RS- CC RS+ V > 2V 0 1 RS+ I RS+ V 2V -25 +2 RS+ Input Bias Current A V > 2V 0 2 RS+ I RS- V 2V -50 +2 RS+ Gain = 20V/V or 50V/V 150 Full-Scale Sense Voltage V mV SENSE (Note 4) Gain = 100V/V 100 MAX4372 ESA 0.3 0.8 T = +25C A V = V = 12V CC RS+ MAX4372 EUK, EBT 0.3 1.3 Input Offset Voltage V mV OS (Note 5) MAX4372 ESA 1.1 T = T to T A MIN MAX V = V = 12V CC RS+ MAX4372 EUK, EBT 1.9 Full-Scale Accuracy V = 100mV, V = 12V, SENSE CC 0.18 3 (Note 5) V = 12V, T = +25C (Note 7) RS+ A V = 100mV, V = 12V, SENSE CC 6 V = 12V (Note 7) RS+ V = 100mV, V = 28V, SENSE CC 0.15 7 % V = 28V (Note 7) Total OUT Voltage Error RS+ (Note 6) V = 100mV, V = 12V, SENSE CC 1 28 V = 0.1V (Note 7) RS+ V = 6.25mV, V = 12V, SENSE CC 0.15 V = 12V (Note 8) RS+ Maxim Integrated 2 www.maximintegrated.com