RT6255A/B
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, VIN ------------------------------------------------------------------------------------------- −0.3V to 20V
Enable Pin Voltage, EN ---------------------------------------------------------------------------------------------- −0.3V to 20V
Switch Node Voltage, LX --------------------------------------------------------------------------------------------- −0.3V to 20V
<20ns -------------------------------------------------------------------------------------------------------------------- −5V to 27V
BOOT to LX, VBOOT − VLX -------------------------------------------------------------------------------------------- −0.3V to 6V
Other Pins --------------------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
TSOT-23-6 (FC) -------------------------------------------------------------------------------------------------------- 1.923W
TSOT-23-8 (FC) -------------------------------------------------------------------------------------------------------- 1.923W
Package Thermal Resistance (Note 2)
TSOT-23-6 (FC), θJA --------------------------------------------------------------------------------------------------- 52°C/W
TSOT-23-6 (FC), θJC --------------------------------------------------------------------------------------------------------------------------------------------- 5°C/W
TSOT-23-8 (FC), θJA --------------------------------------------------------------------------------------------------- 52°C/W
TSOT-23-8 (FC), θJC -------------------------------------------------------------------------------------------------- 5°C/W
Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
Storage Temperature Range----------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ----------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Input Voltage-------------------------------------------------------------------------------------------------- 4.5V to 18V
Junction Temperature Range---------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range---------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Supply Voltage
Symbol
Test Conditions
Min
Typ
Max
Unit
VIN Supply Input Operating Voltage VIN
VIN Under-Voltage Lockout
4.5
3.9
--
18
V
V
VUVLO
VIN rising
4.1
4.3
Threshold-Rising
VIN Under-Voltage Lockout
Threshold-Hysteresis
VUVLO
--
0.3
--
V
Supply current
Supply Current (Shutdown)
ISHDN
IQ
VEN = 0
IOUT = 0
--
--
3
--
--
A
A
Supply Current (Quiescent)
VFB = VREF x 105%
115
(not switching)
Soft-Start
Soft-Start Time
tSS
--
1.5
--
ms
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is a registered trademark of Richtek Technology Corporation.
DS6255A/B-02 March 2017
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7
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