RT7273
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VIN1, VIN2, VIN3, VINR -----------------------------------------------------------
−0.3V
to 21V
Switch Node Voltage, LX1, LX2, LX3 ------------------------------------------------------------------------
−0.3V
to (VINx + 0.3V)
< 10ns ---------------------------------------------------------------------------------------------------------------
−5V
to 25V
BOOTx to LXx -----------------------------------------------------------------------------------------------------
−0.3V
to 6V
Other Pins ---------------------------------------------------------------------------------------------------------
−0.3V
to 6V
Power Dissipation, P
D
@ T
A
= 25°C
WQFN-40L 6x6 --------------------------------------------------------------------------------------------------- 3.52W
Package Thermal Resistance (Note 2)
WQFN-40L 6x6,
θ
JA
---------------------------------------------------------------------------------------------- 28.4°C/W
WQFN-40L 6x6,
θ
JC
--------------------------------------------------------------------------------------------- 5.3°C/W
Lead Temperature (Soldering, 10 sec.) ---------------------------------------------------------------------- 260°C
Junction Temperature -------------------------------------------------------------------------------------------- 150°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
(V
IN
= 12V, f
S
= 800kHz, T
A
= 25°C, unless otherwise specified)
Parameter
Supply Current (Shutdown)
Supply Current (Quiescent)
Supply Current (LOWP
enabled)
VIN Under-Voltage Lockout
VIN Under-Voltage Lockout
Hysteresis
VIN Under-Voltage Lockout
Deglitch
Internal Biasing Supply
Internal Biasing Supply
PVCC Under-Voltage
Lockout
PVCC Under-Voltage
Lockout Hysteresis
Symbol
I
Q_SDN
I
Q
Test Conditions
V
EN
= 0V for All CHs
Converters enabled,
Buck1 = 3.3V, Buck2 = 2.5V,
Buck3 = 7.5V
Converters enabled,
Buck1 = 3.3V, Buck2 = 2.5V,
Buck3 = 7.5V
V
IN
Rising
V
IN
Falling
Min
--
--
Typ
1.3
20
Max
--
--
Unit
mA
mA
Input Supply UVLO and Internal Supply Voltage
I
Q_LOWP
V
VIN_UVLO
--
--
--
--
1.5
4.2
200
100
5
4.6
3.8
250
--
--
--
--
--
--
--
--
mA
V
mV
s
V
V
V
mV
V
PVCC
V
VCC
V
PVCC_UVLO
PVCC Rising
--
--
--
--
Copyright
©
2014 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS7273-04
October 2014
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
