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AIC1633CS Datasheet(PDF) 6 Page - Analog Intergrations Corporation |
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AIC1633CS Datasheet(HTML) 6 Page - Analog Intergrations Corporation |
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6 / 10 page  AIC1633 6 PIN DESCRIPTIONS AIC1633-30/ AIC1633-33 / AIC1633-50 PIN 1: ILIM/SD- 1. Connected to VIN pin through a resistor to set the switch peak current. It serves to protect IC and inductor, as well as to improve efficiency and output ripples. However, the current limit resistor limits supply capability of the AIC1633. (See typical performance characteristics). The ILIM/SD pin should be shorted to VIN pin if limiting on switch peak current is not intended. 2. The AIC1633 goes in shutdown mode and consumes less than 10 µA when ILIM/SD pin is pulled to ground. PIN 2: VIN - Input supply. PIN 3: SW - Drain of the power switch, to be connected to inductor/ diode. PIN 4:SGND - Ground connected to source of power switch. PIN 5:CGND - Ground for control circuits of the IC. It should be separated from SGND to avoid the interference. PIN 6:LBO - Open drain output of the battery low detector, with 45 Ω “ON resistance” at VIN=2V. It is pulled low when the voltage on LBI pin is below 1.22V. PIN 7:LBI - The noninverting input of the battery low detector, of which the inverting input is internally connects to 1.22V voltage reference. PIN 8:VOUT - The output voltage feedbacks to the IC through this pin. AIC1633A PIN 1:ILIM/SD- 1. Connected to VIN pin through a resistor to set the switch peak current. It serves to protect IC and inductor, as well as to improve efficiency and output ripples. However, the current limit resistor limits supply capability of the AIC1633A. (See typical performance characteristics). The ILIM/SD pin should be shorted to VIN pin if limiting on switch peak current is not intended. 2. The AIC1633A goes in shutdown mode and consumes less than 10 µA when ILIM/SD pin is pulled to ground. PIN 2: VIN - Input supply. PIN 3: SW - Drain of the power switch, to be connected to inductor/ diode. PIN 4: GND - Ground. PIN 5: FB - Output voltage can either be internally set to 5 volt by grounding FB pin, or be externally set to an arbitrary voltage by applying to FB pin the divider voltage of two divider resistors. VOUT voltage is given by the following equation: 1 0.617 V R2 R1 OUT − = where R1 = Resistor connected between FB pin and VOUT pin. R2 = Resistor connected between FB pin and ground. VOUT=Output voltage to be set. PIN 6: LBO - Open drain output of the battery low detector, with 45 Ω “ON resistance” at VIN=2V. It is pulled low when the voltage on LBI pin is below 1.22V. |
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