RT7278
Absolute Maximum Ratings
(Note 1)
Supply Voltage, VIN -----------------------------------------------------------------------------------------------
−0.3V
to 21V
Switch Voltage, SW -----------------------------------------------------------------------------------------------
−0.8V
to (V
IN
+ 0.3V)
<10ns -----------------------------------------------------------------------------------------------------------------
−5V
to 25V
BOOT to SW, PVCC ----------------------------------------------------------------------------------------------
−0.3V
to 6V
Other Pins Voltage -------------------------------------------------------------------------------------------------
−0.3V
to 21V
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
Junction Temperature Range ------------------------------------------------------------------------------------- 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 Voltage, VIN ----------------------------------------------------------------------------------------------- 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, T
A
= 25°C, unless otherwise specified)
Parameter
Supply Current
Shutdown Current
Quiescent Current
Logic Threshold
EN Input Voltage
Logic-High
Logic-Low
Symbol
I
SHDN
I
Q
Test Conditions
V
EN
= 0V
V
EN
= 3V, V
FB
= 1V
Min
--
--
2
--
Typ
1.5
0.7
--
--
0.765
0
5.1
--
--
110
Max
10
--
18
0.4
0.773
0.1
5.5
20
100
--
Unit
μA
mA
V
V
FB
Voltage and Discharge Resistance
Feedback Threshold Voltage
Feedback Input Current
V
PVCC
Output
V
PVCC
Output Voltage
Line Regulation
Load Regulation
Output Current
I
PVCC
V
PVCC
6V
≤
V
IN
≤
18V, 0 < I
PVCC
<
5mA
6V
≤
V
IN
≤
18V, I
PVCC
= 5mA
0
<
I
PVCC
<
5mA
V
IN
= 6V, V
PVCC
= 4V
4.7
--
--
--
V
mV
mV
mA
V
FB
I
FB
4.5V
≤
V
IN
≤
18V
V
FB
= 0.8V
0.757
−0.1
V
μA
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7278-00 January 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
