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DS6257A Datasheet, PDF (5/15 Pages) Richtek Technology Corporation – 6A, 18V, 500kHz, ACOTTM Step-Down Converter | |||
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RT6257A/B
Absolute Maximum Ratings (Note 1)
ï¬ Supply Input Voltage and EN Voltage, VIN, EN ---------------------------------------------------------------- â0.3V to 20V
ï¬ Switch Voltage, LX ---------------------------------------------------------------------------------------------------- â0.3V to 20V
<20ns -------------------------------------------------------------------------------------------------------------------- â5V to 27V
ï¬ BOOT to LX, VBOOT â VLX ------------------------------------------------------------------------------------------------------------------------------------ â0.3V to 6V
ï¬ Other Pins --------------------------------------------------------------------------------------------------------------- â0.3V to 6V
ï¬ Power Dissipation, PD @ TA = 25°C
TSOT-23-6 (FC) --------------------------------------------------------------------------------------------------------- 2.12W
ï¬ Package Thermal Resistance (Note 2)
TSOT-23-6 (FC), θJA --------------------------------------------------------------------------------------------------- 47°C/W
TSOT-23-6 (FC), θJC --------------------------------------------------------------------------------------------------- 2°C/W
ï¬ Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
ï¬ Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
ï¬ Storage Temperature Range ----------------------------------------------------------------------------------------- â65°C to 150°C
ï¬ ESD Susceptibility (Note 3)
HBM (Human Body Model) ------------------------------------------------------------------------------------------ 2kV
Recommended Operating Conditions (Note 4)
ï¬ Supply Input Voltage -------------------------------------------------------------------------------------------------- 4.5V to 18V
ï¬ Junction Temperature Range ---------------------------------------------------------------------------------------- â40°C to 125°C
ï¬ Ambient Temperature Range ---------------------------------------------------------------------------------------- â40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Conditions
Min Typ Max Unit
Supply Voltage
VIN Supply Input Operating
Voltage
VIN
4.5
--
18
V
VIN Under-Voltage Lockout
Threshold-Rising
VUVLO
VIN rising
3.9 4.1 4.3 V
VIN Under-Voltage Lockout
Threshold-Hysteresis
ïVUVLO
-- 0.3 --
V
Supply Current
Supply Current (Shutdown)
Supply Current (Quiescent)
ISHDN
IQ
VEN = 0
--
3
-- ïA
IOUT = 0
VFB = VREF x 105%, not switching
--
115 --
ïA
Soft-Start
Soft-Start Time
tSS
-- 1.5 -- ms
Enable Voltage
EN Input High Voltage
EN Input Low Voltage
VEN_H
VEN_L
1.5 --
--
V
--
-- 0.4 V
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS6257A/B-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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