DATASHEET ISL28006 FN6548 Rev 6.00 Micropower, Rail to Rail Input Current Sense Amplifier with Voltage Output November 22, 2013 The ISL28006 is a micropower, uni-directional high-side and Features low-side current sense amplifier featuring a proprietary Low Power Consumption 50A, Typ rail-to-rail input current sensing amplifier. The ISL28006 is ideal for high-side current sense applications where the sense Supply Range 2.7V to 28V voltage is usually much higher than the amplifier supply Wide Common Mode Input 0V to 28V voltage. The device can be used to sense voltages as high as Gain Versions 28V when operating from a supply voltage as low as 2.7V. The micropower ISL28006 consumes only 50A of supply current - ISL28006-100 100V/V when operating from a 2.7V to 28V supply. - ISL28006-50 50V/V - ISL28006-20 20V/V The ISL28006 features a common-mode input voltage range from 0V to 28V. The proprietary architecture extends the input - ISL28006-ADJ ADJ (Min Gain = 20V/V) voltage sensing range down to 0V, making it an excellent Operating Temperature Range -40C to +125C choice for low-side ground sensing applications. The benefit of this architecture is that a high degree of total output accuracy Packages 5 Ld SOT-23, 6 Ld SOT-23 is maintained over the entire 0V to 28V common mode input voltage range. Applications Power Management/Monitors The ISL28006 is available in fixed (100V/V, 50V/V, 20V/V and Adjustable) gains in the space saving 5 Ld SOT-23 package Power Distribution and Safety and the 6 Ld SOT-23 package for the adjustable gain part. The DC/DC, AC/DC Converters parts operate over the extended temperature range from Battery Management/Charging -40C to +125C. Automotive Power Distribution Related Literature See AN1532 for ISL28006 Evaluation Board Users Guide SENSE +12VDC +12VDC OUTPUT R SENSE - +5VDC I 0.6 ISL28006 SENSE +100C GAIN 100 -40C +25C +125C +12VDC + 0.4 SENSE +5VDC 0.2 +5VDC OUTPUT R 0 SENSE - +5VDC -0.2 I SENSE ISL28006 +5VDC -0.4 + SENSE -0.6 +1.0VDC +1.0VDC -0.8 R OUTPUT SENSE - +5VDC MULTIPLE -1 I SENSE ISL28006 OUTPUT -1.2 +1.0VDC POWER SUPPLY + -1.4 0 2468 10121416182022242628 GND V (V) RS+ FIGURE 1. TYPICAL APPLICATION FIGURE 2. GAIN ACCURACY vs V = 0V TO 28V RS+ FN6548 Rev 6.00 Page 1 of 26 November 22, 2013 ACCURACY (%)ISL28006 Block Diagram V V CC CC I = 2.86A I = 2.86A V V SENSE SENSE HIGH-SIDE HIGH-SIDE R R S+ S+ AND AND R LOW-SIDE R LOW-SIDE 1 1 gm SENSING gm HI HI SENSING R R S- S- R R 2 2 + + OUT OUT 1.35V 1.35V - - R R f f V V CC CC F B I I MIRROR MIRROR R R g g R R R R 3 5 3 5 gm gm LO LO V V SENSE SENSE R R 4 4 GND GND FIXED GAIN PARTS ADJUSTABLE GAIN PART Pin Configurations ISL28006-100, 50, 20 ISL28006-ADJ (5 LD SOT-23) (6 LD SOT-23) TOP VIEW TOP VIEW FB 1 6 GND GND 1 5 R S- FIXED ADJ. OUT 2 5R OUT 2 S- GAIN GAIN V 3 4 R V 3 4 R CC S+ CC S+ Pin Descriptions ISL28006-100, 50, 20 ISL28006-ADJ (5 LD SOT-23) (6 LD SOT-23) PIN NAME DESCRIPTION 16 GND Power Ground 1FB Input Pin for External Resistors 2 2 OUT Amplifier Output 33 V Positive Power Supply CC 44 R Sense Voltage Non-inverting Input S+ 55 R Sense Voltage Inverting Input S- FB V CC R S- CACAPPAACCIITTIIVVEELLYY COUPLEDCOUPLED OUT ESESD CLAD CLAMMPP R S+ GND FN6548 Rev 6.00 Page 2 of 26 November 22, 2013