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

номер детали MCP1630-E/MS
подробное описание детали  High-Speed, Microcontroller-Adaptable, Pulse Width Modulator
PDF  26 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1630-E/MS датащи(HTML) 13 Page - Microchip Technology

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© 2005 Microchip Technology Inc.
DS21896B-page 13
MCP1630/MCP1630V
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
Ω pull-down resis-
tor 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.



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