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MIC2230-GWYML Datasheet(PDF) 3 Page - Micrel Semiconductor |
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MIC2230-GWYML Datasheet(HTML) 3 Page - Micrel Semiconductor |
3 / 18 page Micrel, Inc. MIC2230 April 2010 3 M9999-040810-C Pin Description Pin Number Adjustable Pin Number Fixed Pin Name Pin Name 1 – FB2 Feedback 2: For adjustable voltage options connect the external resistor divider network to FB2 to set the output voltage of regulator 2. Nominal value is 0.8V. 2 2 EN2 Enable 2 input. Logic low powers down regulator 2. Logic high powers up regulator 2. MIC2230 features built-in soft- start circuitry that reduces in-rush current and prevents the output voltage from overshooting at start up. 3 3 AVIN Analog Supply Voltage: Supply voltage for the analog control circuitry. Requires bypass capacitor to GND. 4 4 SW2 Switch node for regulator 2, connected to external inductor. 5 5 AGND Analog (signal) ground. 6 6 PGND Power ground. 7 7 /FPWM Forced PWM Mode Bar. Grounding this pin forces the device to stay in constant frequency PWM mode only. Pulling this pin high enables automatic Trickle Mode TM operation. 8 8 SW1 Switch node for regulator 1, connected to external inductor. 9 9 VIN Supply Voltage: Supply voltage for the internal switches and drivers. 10 10 PGOOD Power Good Output. This output is pulled down unless the regulator 1 output voltage is within +6.25% and -8.5% of regulation. After the output voltage is in regulation, the output starts to go high with an internal 5µA current source. A delay time could be programmed by tying a capacitor to this pin. 11 11 EN1 Enable 1 input. Logic low powers down regulator 1. Logic high powers up regulator 1. MIC2230 features built-in soft- start circuitry that reduces in-rush current and prevents the output voltage from overshooting at start up. 12 – FB1 Feedback 1: For adjustable voltage options connect to the external resistor divider network to FB1 to set the output voltage of regulator 1. Nominal value is 0.8V. – 1 OUT2 Output Voltage 2. For fixed output voltage options connect OUT2 to the output voltage of regulator 2. – 12 OUT1 Output Voltage 1. For fixed output voltage options connect OUT1 to the output voltage of regulator 1. EP EP EP Back-side pad. |
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