RT6551A/B
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, TON to GND------------------------------------------------------------------------------------ −0.3V to 32V
BOOT to PHASE ---------------------------------------------------------------------------------------------------------- −0.3V to 6V
PHASE to GND
DC----------------------------------------------------------------------------------------------------------------------------- −0.3V to 32V
< 20ns ----------------------------------------------------------------------------------------------------------------------- −8V to 38V
LGATE toGND
DC----------------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
< 20ns ----------------------------------------------------------------------------------------------------------------------- −2.5V to 7.5V
UGATE to PHASE
DC----------------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
< 20ns ----------------------------------------------------------------------------------------------------------------------- −5V to 7.5V
VDD, CS, S3, S5, VTTSNS, VDDQ, VID, VTTREF, VTT, VLDOIN, FB, PGOOD to GND---------------- −0.3V to 6V
PGND, VTTGNDtoGND ------------------------------------------------------------------------------------------------- −0.3V to 0.3V
Other Pins------------------------------------------------------------------------------------------------------------------- −0.3V to 6.5V
PowerDissipation, PD @ TA = 25°C
WQFN-20L 3x3 ------------------------------------------------------------------------------------------------------------ 3.33W
Package Thermal Resistance (Note 2)
WQFN-20L 3x3, θJA ------------------------------------------------------------------------------------------------------- 30°C/W
WQFN-20L 3x3, θJC ------------------------------------------------------------------------------------------------------ 7.5°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)
Input Voltage, VIN --------------------------------------------------------------------------------------------------------- 4.5V to 26V
Control Voltage, VDD ----------------------------------------------------------------------------------------------------- 4.5V to 5.5V
Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range-------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD = 5V, VIN = 12V, RTON = 620kΩ, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
PWM Controller
FB Forced above the Regulation Point,
Quiescent Supply Current
--
135
--
A
V
S5 = 5V, VS3 = 0V, Not Switching
TON Operating Current
IVLDOIN BIAS Current
IVLDOIN Standby Current
RTON = 620k, VIN = 12V
--
--
--
19
1
--
--
A
A
A
VS5 = VS3 = 5V, VTT = No Load
VS5 = 5V, VS3 = 0, VTT = No Load
0.1
10
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is a registered trademark of Richtek Technology Corporation.
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6
DS6551A/B-00 May 2015
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