DC2177A-B

DC2177A-B demonstration circuit features LT®3062, a micropower, low noise and low dropout voltage linear regulator. The input voltage ranges from 2.1 to 45V and the maximum output current is 200mA. A resistor divider determines the output voltage, and a jumper adjusts the divider to set the output voltage to either 1.2V, 1.5V, 1.8V, 2V, 2.5V, 3.3V, 5V or a voltage that is user-programmed but requires the installation of a resistor. The output uses a 10µF ceramic capacitor and the internal reference is bypassed with a 10nF capacitor to reduce output noise and program the soft-start. There is also a 10nF feedforward capacitor to improve load transient response and decrease noise at higher output voltages. The position of the VOUTEN jumper either pulls up the (active low)SHDN pin to the input supply through a 100K resistor, shorts (active low)SHDN to the ground or floats the (active low)SHDN pin so it can be driven directly by a signal applied to the (active low)SHDN terminal.

• Minimum input voltage (VIN) is 2.1V (max) at VIN – VOUT ≥ 360mV
• Maximum input voltage, VIN is 45V(min)
• 200mA (min) maximum output current (IOUT) at VIN = 2.3V, VOUT = 1.8V

附註

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