RT7263B
Absolute Maximum Ratings
(Note 1)
Supply Input 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 ------------------------------------------------------------------------------------------------ 1.667W
Package Thermal Resistance (Note 2)
WDFN-14L 4x3,
θ
JA
------------------------------------------------------------------------------------------ 60°C/W
WDFN-14L 4x3,
θ
JC
------------------------------------------------------------------------------------------ 7°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, 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
Short Circuit Frequency
Maximum Duty Cycle
Minimum On Time
Feedback Voltage
Feedback Current
EN Voltage
Logic-High
Logic-Low
Symbol
I
SHDN
I
Q
R
DS(ON)1
R
DS(ON)2
I
LEAK
I
LIMIT
f
SW
D
MAX
t
ON
V
FB
I
FB
V
IH
V
IL
V
EN
= 2V
V
EN
= 0V
V
EN
= 0
Test Conditions
Min
--
--
--
--
Typ
0
0.7
120
40
0
6.5
500
150
90
100
Max
1
--
--
--
10
--
575
--
--
--
Unit
μA
mA
mΩ
mΩ
μA
A
kHz
kHz
%
ns
V
nA
V
μA
V
EN
= 2V, V
FB
= 1V
V
EN
= 0V, V
SW
= 0V or 12V
V
BOOT
−
V
SW
= 4.8V
V
FB
= 0.75V
V
FB
= 0V
V
FB
= 0.8V
4.5V
≤
V
IN
≤
21V
--
5.4
425
--
--
--
0.593 0.603 0.613
--
2
--
--
--
10
--
--
1
0
50
5.5
0.4
--
--
Enable Current
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7263B-01
September 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
