RT7257A Просмотр технического описания (PDF) - Richtek Technology
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RT7257A Datasheet PDF : 14 Pages
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RT7257A
Parameter
Symbol
EN Input Threshold
Voltage
Logic-High
Logic-Low
Input Under Voltage Lockout Threshold
Input Under Voltage Lockout Hysteresis
Soft-Start Current
Soft-Start Period
Thermal Shutdown
VIH
VIL
VUVLO
ΔVUVLO
ISS
tSS
TSD
Test Conditions
VIN Rising
VSS = 0V
CSS = 0.1μF
Min Typ Max Unit
2.7
--
18
V
--
--
0.4
3.8 4.2 4.5
V
-- 320 --
mV
--
6
--
μA
-- 13.5 --
ms
-- 150 --
°C
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS7257A-02 September 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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