ISL28005FH100Z-T7A Renesas

DATASHEET ISL28005 FN6973 Rev 5.00 Micropower, Rail-to-Rail Input Current Sense Amplifier with Voltage Output October 24, 2013 The ISL28005 is a micropower, uni-directional high-side and Features low-side current sense amplifier featuring a proprietary rail-to- Low Power Consumption .50A,Typ rail input current sensing amplifier. The ISL28005 is ideal for high-side current sense applications where the sense voltage Supply Range 2.7V to 28V is usually much higher than the amplifier supply voltage. The Wide Common Mode Input 0V to 28V device can be used to sense voltages as high as 28V when Fixed Gain Versions operating from a supply voltage as low as 2.7V. The micropower ISL28005 consumes only 50A of supply current - ISL28005-100 100V/V when operating from a 2.7V to 28V supply. - ISL28005-50 50V/V - ISL28005-20 20V/V The ISL28005 features a common-mode input voltage range from 0V to 28V. The proprietary architecture extends the input Operating Temperature Range .-40C to +125C voltage sensing range down to 0V, making it an excellent Package . 5 Ld SOT-23 choice for low-side ground sensing applications. The benefit of this architecture is that a high degree of total output accuracy Applications is maintained over the entire 0V to 28V common mode input voltage range. Power Management/Monitors The ISL28005 is available in fixed (100V/V, 50V/V and 20V/V) Power Distribution and Safety gains in the space saving 5 Ld SOT-23 package. The parts DC/DC, AC/DC Converters operate over the extended temperature range from -40C to Battery Management/Charging +125C. Automotive Power Distribution Related Literature See AN1531 for ISL28005 Evaluation Board Users Guide See AN1567 for ISL28005, ISL28006 Unidirectional Current Sense Amplifiers SENSE +12VDC +12VDC OUTPUT R 1.8 SENSE +5VDC V - RS+ 1.6 I ISL28005 SENSE +12VDC + 1.4 SENSE V = 1.52V TH(L-H) +5VDC 1.2 +5VDC V = 1.23V OUTPUT TH(H-L) R SENSE 1.0 - +5VDC I ISL28005 SENSE 0.8 V (G=100) +5VDC OUT + 0.6 SENSE G100, V = 1V 0.4 OUT +1.0VDC +1.0VDC G50, V = 500mV R OUTPUT OUT SENSE 0.2 +5VDC G20, V = 200mV - OUT MULTIPLE I SENSE ISL28005 OUTPUT 0 +1.0VDC POWER SUPPLY + 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 TIME (ms) GND FIGURE 1. TYPICAL APPLICATION FIGURE 2. HIGH-SIDE AND LOW-SIDE THRESHOLD VOLTAGE FN6973 Rev 5.00 Page 1 of 16 October 24, 2013 VOLTS (V)ISL28005 Block Diagram V CC I = 2.86A V SENSE R HIGH-SIDE S+ AND R 1 LOW-SIDE gm HI SENSING R S- R 2 + OUT 1.35V - R f V CC I MIRROR R g R R 3 5 gm LO V SENSE R 4 GND Pin Configuration Pin Descriptions ISL28005 ISL28005 PIN (5 LD SOT-23) (5 ld SOT-23) NAME DESCRIPTION TOP VIEW 1GND Power Ground GND 1 5 RS- 2 OUT Amplifier Output FIXED 3V Positive Power Supply CC OUT 2 GAIN 4 RS+ Sense Voltage Non-inverting Input V 3 4 RS+ CC 5 RS- Sense Voltage Inverting Input V CC RS- CACAPPAACITIVELCITIVELYY OUT COCOUPUPLLEEDD ESDESD C CLLAMAMPP RS+ GND FN6973 Rev 5.00 Page 2 of 16 October 24, 2013