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 to GND
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, VTTGND to GND -------------------------------------------------------------------------------------------------
−0.3V
to 0.3V
Other Pins -------------------------------------------------------------------------------------------------------------------
−0.3V
to 6.5V
Power Dissipation, P
D
@ T
A
= 25°C
WQFN-20L 3x3 ------------------------------------------------------------------------------------------------------------ 3.33W
Package Thermal Resistance (Note 2)
WQFN-20L 3x3,
θ
JA
-------------------------------------------------------------------------------------------------------
WQFN-20L 3x3,
θ
JC
------------------------------------------------------------------------------------------------------
Junction Temperature -----------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------
Storage Temperature Range --------------------------------------------------------------------------------------------
ESD Susceptibility (Note 3)
HBM (Human Body Model) ----------------------------------------------------------------------------------------------
(Note 4)
4.5V to 26V
4.5V to 5.5V
−40°C
to 125°C
−40°C
to 85°C
30°C/W
7.5°C/W
150°C
260°C
−65°C
to 150°C
2kV
Recommended Operating Conditions
Input Voltage, VIN ---------------------------------------------------------------------------------------------------------
Control Voltage, VDD -----------------------------------------------------------------------------------------------------
Junction Temperature Range --------------------------------------------------------------------------------------------
Ambient Temperature Range --------------------------------------------------------------------------------------------
Electrical Characteristics
(V
DD
= 5V, V
IN
= 12V, R
TON
= 620kΩ, T
A
= 25°C, unless otherwise specified)
Parameter
PWM Controller
Quiescent Supply Current
TON Operating Current
I
VLDOIN
BIAS Current
I
VLDOIN
Standby Current
Symbol
Test Conditions
FB Forced abov e the Regulation Point,
V
S5
= 5V, V
S3
= 0V, Not Switching
R
TON
= 620k, V
IN
= 12V
V
S5
= V
S3
= 5V, VTT = No Load
V
S5
= 5V, V
S3
= 0, VTT = No Load
Min
Typ
Max
Unit
--
--
--
--
135
19
1
0.1
--
--
--
10
A
A
A
A
Copyright
©
2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS6551A/B-00 May 2015
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
