MCP1630-ESLASHMS datasheet(13/30 Pages) MICROCHIP

No de pièce	MCP1630-E/MS

Description	High-Speed, Microcontroller-Adaptable, Pulse Width Modulator

PDF	30 Pages

Scroll/Zoom	100%

Fabricant	MICROCHIP [Microchip Technology]

Site Internet	http://www.microchip.com

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DS20001896D-page 13

MCP1630/MCP1630V

comparator, allowing narrow pulse widths at VEXT.

4.6

Undervoltage Lockout (UVLO)

When the input voltage (VIN) is less than the UVLO

threshold, the VEXT is held in the low state. This will

ensure that, if the voltage is not adequate to operate

the MCP1630/V, the main power supply switch will be

held in the off state. When the UVLO threshold is

exceeded, there is some hysteresis in the input voltage

prior to the UVLO off threshold being reached. The

typical hysteresis is 75 mV. Typically, the MCP1630 will

not start operating until the input voltage at VIN is

between 3.0V and 3.1V.

4.7

Overtemperature Protection

To protect the VEXT output if shorted to VIN or GND, the

MCP1630/V VEXT output will be high-impedance if the

junction temperature is above the thermal shutdown

threshold. There is an internal 100 k

 pull-down

resistor connected from VEXT to ground to provide

some pull-down during overtemperature conditions.

The protection is set to 150°C (typ.), with a hysteresis

of 18°C.

MCP1630-E/MS Fiches technique(PDF) 13 Page - Microchip Technology