MCP1632-BAESLASHMS datasheet(12/34 Pages) MICROCHIP

12 / 34 page

MCP1632

DS20005254A-page 12

 2013 Microchip Technology Inc.

3.7

Input Bias (VIN)

VIN is the input voltage pin. Connect the input voltage

source to the VIN pin. For normal operation, the voltage

on the VIN pin should range from +3.0V to +5.5V. A

bypass capacitor of at least 0.1 µF should be

connected between the VIN pin and the GND pin. This

decoupling capacitor must be located as close as

possible to the controller package.

3.8

Reference Voltage Input/Internal

Constant Current Generator

Output (VREF)

This pin is the output of the internal Constant Current

Generator (50 µA typical). An external resistor must be

connected between this pin and GND. The current

flowing in this resistor will set the reference voltage.

Optionally, a capacitor may also be connected between

this pin and GND to set the soft start ramp behavior.

This pin may be overdriven by an external voltage

source, enabling the reference voltage to be controlled

externally. Refer to Section 4.7 “Reference Voltage

Generator”

for details.

MCP1632-BAE/MS 数据表(PDF) 12 Page - Microchip Technology