RT6254A/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-23-8 (FC), θJA -------------------------------------------------------------------------------------------------------- 52°C/W
TSOT-23-6 (FC), θJC -------------------------------------------------------------------------------------------------------- 5°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
4.5
3.9
--
--
18
4.3
--
V
V
V
Vin Under-Voltage Lockout
Threshold-Rising
VUVLO
VIN rising
4.1
0.3
VIN Under-Voltage Lockout
Threshold-Hysteresis
VUVLO
Supply Current
Shutdown Current
ISHDN
IQ
VEN = 0
OUT = 0
VFB = VREF x 105% (no switching)
--
--
3
--
--
A
A
I
Quiescent Current
115
Soft-Start
Soft-Start Time
tSS
--
1.5
--
ms
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is a registered trademark of Richtek Technology Corporation.
DS6254A/B-02 March 2017
www.richtek.com
5
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