Datasheet LT6106 (Analog Devices) - 6

LT6106
TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage vs Input Sense Output Voltage vs Input Sense Voltage (0mV ≤ VSENSE ≤ 200mV) Voltage (0mV ≤ VSENSE ≤ 1V) Supply Current vs Supply Voltage
12 12 120 V+ = 12V V+ = 12V AV = 100 AV = 20 10 RIN = 100Ω 10 RIN = 500Ω 100 ROUT = 10k ROUT = 10k 8 8 80 (V) (V) 6 6 60 V OUT V OUT Y CURRENT (µA) 4 4 40 SUPPL TA = –40°C TA = 25°C 2 2 20 TA = 70°C TA = 85°C TA = 125°C 0 0 0 0 20 40 60 80 100 120 140 160 180 200 0 100 200 300 400 500 600 700 800 900 1000 0 5 10 15 20 25 30 35 40 45 VSENSE (mV) VSENSE (mV) SUPPLY VOLTAGE (V) 6106 G21 6106 G22 6106 G01
PIN FUNCTIONS OUT (Pin 1):
Current Output. OUT will source a current
V+ (Pin 5):
Positive Supply Pin. The V+ pin should be con- that is proportional to the sense voltage into an external nected directly to either side of the sense resistor, RSENSE. resistor. Supply current is drawn through this pin. The circuit may
V– (Pin 2):
Normally Connected to Ground. be configured so that the LT6106 supply current is or is not monitored along with the system load current. To
–IN (Pin 3):
The internal sense amplifier will drive –IN to monitor only the system load current, connect V+ to the the same potential as +IN. A resistor (RIN) tied from V+ more positive side of the sense resistor. To monitor the to –IN sets the output current I OUT = VSENSE/RIN. VSENSE total current, including that of the LT6106, connect V+ to is the voltage developed across RSENSE. the more negative side of the sense resistor.
+IN (Pin 4):
Must be tied to the system load end of the sense resistor, either directly or through a resistor.
BLOCK DIAGRAM
ILOAD VSENSE – + VBATTERY RSENSE 5 L RIN V+ O A D –IN 14k – 3 +IN 14k + 4 IOUT OUT R 1 V OUT V– OUT = VSENSE • RIN 2 R 6106 F01 OUT
Figure 1. LT6106 Block Diagram and Typical Connection
6106fb 6 For more information www.linear.com/LT6106