RT7272A
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VIN -----------------------------------------------------------------------------------------
−0.3V
to 40V
Switch Voltage, SW ------------------------------------------------------------------------------------------------
−0.3V
to (V
IN
+ 0.3V)
V
BOOT
−
V
SW
----------------------------------------------------------------------------------------------------------
−0.3V
to 6V
Other Pins Voltage --------------------------------------------------------------------------------------------------
−0.3V
to 40V
Power Dissipation, P
D
@ T
A
= 25°C
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------------- 2.041W
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad),
θ
JA
---------------------------------------------------------------------------------------- 49°C/W
SOP-8 (Exposed Pad),
θ
JC
--------------------------------------------------------------------------------------- 15°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, VIN ----------------------------------------------------------------------------------------- 4.5V to 36V
Junction Temperature Range --------------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(V
IN
= 12V, C
IN
= 20μF, T
A
= 25°C, unless otherwise specified)
Parameter
Shutdown Supply Current
Quiescent Current
Feedback Reference
Voltage
High Side Switch
On-Resistance
Low Side Switch
On-Resistance
High Side Switch Leakage
Current
Upper Switch Current Limit
Range
Upper Switch Current Limit
Lower Switch Current Limit
Symbol
V
EN
= 0V
I
Q
V
REF
R
DS(ON)1
R
DS(ON)2
Test Conditions
Min
--
--
0.788
--
--
Typ
0.5
0.9
0.8
150
80
0
--
2.5
3.5
5.5
1.5
Max
3
1.2
0.812
--
--
10
6.3
3.1
4.2
6.5
--
Unit
μA
mA
V
mΩ
mΩ
μA
A
V
EN
= 3V, V
FB
= 0.9V
4.5V
≤
V
IN
≤
36V
V
EN
= 0V, V
SW
= 0V
U
OC
U
OC
(Note 5)
Min. Duty Cycle, R
LIM
= 57.6kΩ
Min. Duty Cycle, R
LIM
= 84.5kΩ
Min. Duty Cycle, R
LIM
= 137kΩ
From Drain to Source
--
2
1.9
2.7
4.5
--
A
A
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7272A-01 January 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
