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MAX6008B Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX6008B Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 8 page 1µA SOT23 Precision Shunt Voltage Reference 6 _______________________________________________________________________________________ Detailed Description The MAX6006–MAX6009 are precision, two-terminal, series bandgap voltage references. On-chip thin-film resistors are laser trimmed to provide 0.2% output volt- age accuracies. Voltages of +1.25V, +2.048V,+2.5V, and +3.0V are available in the space-saving SOT23 package (2.1mm ✕ 2.7mm). Applications Information Output/Load Capacitance For devices in this family, OUT needs to be bypassed to GND with a 0.01µF or larger capacitor. In applica- tions where the load or the supply can experience step changes, additional capacitance will reduce the amount of overshoot (or undershoot) and assist the cir- cuit’s transient response. Output Voltage Hysteresis Output voltage hysteresis is the change in the output voltage at TA = +25°C before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the bandgap core transistors. The temperature hysteresis value is typically less than 200ppm. Turn-On Time The output capacitance and bias current of the MAX6006–MAX6009 greatly affects turn-on settling time. In the Typical Operating Characteristics, turn-on time is shown with a 10nF output capacitor and a 1.2µA bias current. Under these conditions, the MAX6006– MAX6009 settle in 40ms. Settling time will linearly decrease in proportion to the circuit’s bias current. Typical Applications In the typical shunt regulator application shown in Figure 1, RBIAS is used to set the current through the load (IL) and the current through the shunt regulator (IRMIN). There are two worst-case situations that RBIAS needs to be sized for: 1) RBIAS must be small enough that when VS (supply voltage) is at its minimum and IL is at its maximum, IRMIN is equal to at least the minimum operating current of the shunt regulator. 2) RBIAS must be large enough that when VS is at its maximum and IL is at its minimum, IRMIN is <2mA. Pin Description PIN NAME FUNCTION SOT23 SO 1 6, 8 OUT Output Voltage. Bias OUT with a pullup resistor to a potential greater than OUT. Bypass OUT to GND with a 0.01 µF or larger capacitor. 24 GND Ground 3 — IC Internally connected test point. Leave this pin unconnected, or connect to GND. — 1, 2, 3, 5, 7 N.C. No connection. Not internally connected. VS IRMIN + IL IL IRMIN RBIAS VOUT VR MAX6006 MAX6007 MAX6008 MAX6009 RBIAS = VS - VR IL + IRMIN Figure 1. Typical Application Circuit |
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Similar Description - MAX6008B |
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