EVALUATION KIT AVAILABLE MAX44286 Low-Power, Precision, 4-Bump WLP, Current-Sense Amplifier General Description Features and Benefits The MAX44286 is a zero-drift, high-side current-sense Ultra-Low Input Offset Voltage and Tiny Gain Error amplifier family that offers precision, low supply cur- Allow Sense Resistor to Detect Tiny Currents (nA) rent and is available in a tiny 4-bump ultra-thin WLP of 30V (max) Offset Voltage 0.78mm x 0.78mm x 0.35mm footprint. This miniature size 0.23% (max) Gain Accuracy is of paramount for todays applications in smartphones, Low Current Consumption Saves Power mobile accessories, notebooks, portable medical, and all 12.5A I for 200kHz Gain Bandwidth CC battery-operated portable devices where current monitor- Space-Saving 4-Bump WLP Package ing with precision and space are critical. 0.78mm x 0.78mm x 0.35mm The MAX44286 has voltage output offered in four gain Industry-Leading Low-Power Supply Range versions of 25V/V, 50V/V, 100V/V, and 200V/V. These 1.6V to 5.5V Input Common Mode four gain versions offer flexibility in the choice of the sense resistor and the very low input offset voltage helps Four Gain Options Offer Flexibility in Sense Resistor Selection in detecting small currents on the orders of low micro- amps. Low power capability also offers the possibility of G = 25V/V (MAX44286T) G = 50V/V (MAX44286F) minimizing power dissipation. G = 100V/V (MAX44286H) The MAX44286 operates with a supply voltage range G = 200V/V (MAX44286W) of 1.6V to 5.5V over the -40C to +85C temperature range and from 1.8V to 5.5V over the -40C to +125C Typical Application Circuit automotive temperature range. Supply voltage for the device is shared with the RS+ pin to fit the MAX44286 in a 4-bump, ultra-thin WLP package. I LOAD RSENSE Applications 0.1F V BAT RS+ RS- Power Management Systems A1 A2 Portable/Battery-Powered Systems GND GND LOAD Smartphones R IN Mobile Accessories Portable Medical GND Notebook Computers and Tablets Ordering Information appears at end of data sheet. V = 3.3V DD For related parts and recommended products to use with this part, refer P to www.maximintegrated.com/MAX44286.related. C OUT MAX1655 MAX44286 ADC B2 R RG B RA GND B1 GND 19-7369 Rev 0 11/14MAX44286 Low-Power, Precision, 4-Bump WLP, Current-Sense Amplifier Absolute Maximum Ratings RS+, RS- to GND ....................................................-0.3V to +6V Operating Temperature Range ......................... -40C to +125C OUT to GND ............................................ -0.3V to (V + +0.3)V Junction Temperature ......................................................+150C RS RS+ to RS- ..............................................................-0.3V to +6V Storage Temperature Range ............................ -65C to +150C Short-Circuit Duration (OUT to Any Other Pins) .......Continuous Soldering Temperature (reflow) .......................................+260C Continuous Input Current (Any Pin) .................................20mA Continuous Power Dissipation (T = +70C) A WLP (derate 9.7mW/C above +70C) ........................776mW 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. (Note 1) Package Thermal Characteristics WLP Junction-to-Ambient Thermal Resistance ( ) ........103C/W JA Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = V = 3.6V, V = 0V, T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C.) (Note 2) RS+ RS- SENSE A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = +25C 12.5 17 A Supply Current I A S -40C < T < +125C 20 A Guaranteed by CMRR, 1.8 5.5 -40C < T < +125C A Common-Mode Input Range V V CM Guaranteed by CMRR, 1.6 5.5 -40C < T < +85C A 1.8V < V < 5.5V, RS+ 120 100 V = 10mV Common-Mode Rejection Ratio/ CMRR, SENSE dB Power-Supply Rejection Ratio PSRR 1.6V < V < 5.5V, -40C < T < +85C, RS+ A 120 100 V = 10mV SENSE T = +25C 7 30 A Input Offset Voltage (Note 3) V V OS -40C < T < +125C 50 A Input Offset Voltage Drift TCV 40 300 nV/C OS (Note 3) MAX44286T 25 MAX44286F 50 Gain G V/V MAX44286H 100 MAX44286W 200 T = +25C 0.1 0.23 A Gain Error (Note 4) GE % -40C < T < +125C 0.25 A Input Bias Current RS- I 0.02 1 nA RS- Capacitive Loading C No sustained oscillations 400 pF L Sink current = 300A 30 65 OUT Low Voltage V mV OL Sink current = 0A 3 15 Maxim Integrated 2 www.maximintegrated.com