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MCP1601 Datasheet(PDF) 9 Page - Microchip Technology |
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MCP1601 Datasheet(HTML) 9 Page - Microchip Technology |
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9 / 24 page  2003-2013 Microchip Technology Inc. DS21762B-page 9 MCP1601 3.0 PIN FUNCTIONS TABLE 3-1: PIN FUNCTION TABLE 3.1 Input Voltage (VIN) Connect the unregulated input voltage source to VIN. If the input voltage source is located more than several inches away, or is a battery, a typical input capacitor of 10 µF is recommended. 3.2 Shutdown Input (SHDN) Connect SHDN to a logic low input to force the device into a shutdown low quiescent current mode. When in shutdown, both the P-Channel and N-Channel switches are turned off, in addition to the internal oscil- lator and other circuitry. When connected to a logic high input, the device will operate in the selected mode. 3.3 Feedback Input (FB) Connect FB to an external resistor divider to set output voltage regulation. The feedback pin is typically equal to 0.8V. See Section 5.0, “Applications Information”, for details in selecting feedback resistors. 3.4 Analog Ground Return (AGND) Tie all small signal ground returns to AGND. (See Section 5.6, “Printed Circuit Board Layout”, for details). 3.5 Oscillator Synchronization or PWM/ PFM Select Mode Input (SYNC/PWM) Connect an external oscillator to SYNC/PWM to syn- chronize. With an external oscillator present, the device is forced into a PWM-only mode of operation. For inter- nal oscillator operation, the SYNC/PWM pin is tied high to operate in a forced PWM-only mode and low for a PWM/PFM mode of operation. 3.6 Output Voltage Sense (VOUT) Connect the output voltage directly to VOUT for sensing. 3.7 Power Ground Return (PGND) Connect all large signal ground returns to PGND. (See Section 5.6, “Printed Circuit Board Layout”, for details). 3.8 BUCK Inductor Connection (LX) Connect LX directly to the BUCK inductor. This pin car- ries large signal-level currents and all connections should be as short and wide as possible. (See Section 5.6, “Printed Circuit Board Layout”, for details). Pin Name Function 1VIN Input Voltage 2SHDN Shutdown Input 3 FB Feedback Input 4AGND Analog Ground Return 5 SYNC/ PWM Oscillator Synchronization or PWM/ PFM Select Mode Input 6VOUT Sensed Output Voltage Input 7PGND Power Ground Return 8LX BUCK Inductor Output |
Similar Part No. - MCP1601_13 |
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Similar Description - MCP1601_13 |
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