RT7262E
Absolute Maximum Ratings
(Note 1)
Supply Voltage, VIN -------------------------------------------------------------------------------------------
−0.3V
to 26V
Switch Voltage, SW -------------------------------------------------------------------------------------------
−0.3V
to (V
IN
+ 0.3V)
Boot Voltage, BOOT ------------------------------------------------------------------------------------------- (SW
−
0.3V) to (SW + 6V)
Other Pins --------------------------------------------------------------------------------------------------------
−0.3V
to 6V
Power Dissipation, P
D
@ T
A
= 25°C
WDFN-14L 4x3 ------------------------------------------------------------------------------------------------- 3.33W
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------- 1.63W
Package Thermal Resistance (Note 2)
WDFN-14L 4x3,
θ
JA
------------------------------------------------------------------------------------------- 30°C/W
WDFN-14L 4x3,
θ
JC
------------------------------------------------------------------------------------------- 7.5°C/W
SOP-8 (Exposed Pad),
θ
JA
---------------------------------------------------------------------------------- 61.2°C/W
SOP-8 (Exposed Pad),
θ
JC
--------------------------------------------------------------------------------- 6.5°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 Range, VIN --------------------------------------------------------------------------- 4.5V to 21V
Junction Temperature Range ---------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range ---------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(V
IN
= 12V, T
A
= 25°C, unless otherwise specified)
Parameter
Shutdown Current
Quiescent Current
Upper Switch On Resistance
Lower Switch On Resistance
Switch Leakage
Current Limit
Oscillator Frequency
SYNC Threshold
Voltage
Logic-High
Logic-Low
Symbol
I
SHDN
I
Q
R
DS(ON)1
R
DS(ON)2
I
LEAK
I
LIM
f
SW
V
SYNCH
V
SYNCL
f
SYNC
I
SYNC
Test Conditions
V
EN
= 0
V
EN
= 2V, V
FB
= 1V
Min
--
--
--
--
Typ
0
0.7
150
60
0
5.5
500
--
--
--
1.5
90
70
--
Max
1
--
--
--
10
--
575
--
0.4
2
2.5
--
--
0.4
Unit
μA
mA
mΩ
mΩ
μA
A
kHz
V
MHz
μA
%
%
V
V
EN
= 0V, V
SW
= 0V or 12V
V
BOOT
−
V
SW
= 4.8V
V
FB
= 0.75V
--
3.9
425
1.8
--
0.3
SYNC Frequency Range
SYNC Input Current
Power Good Rising Threshold
Power Good Falling Threshold
Power Good Sink Current
Capability
V
SYNC
= 6V
--
--
--
Sink 4mA
--
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7262E-00
November 2012
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
